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Add <sys/_null.h> for the definition of NULL:
[dragonfly.git] / usr.bin / make / parse.c
blobaa5bafb4954112587d569a00e05e736495ce284b
1 /*-
2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1989 by Berkeley Softworks
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Adam de Boor.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)parse.c 8.3 (Berkeley) 3/19/94
39 * $FreeBSD: src/usr.bin/make/parse.c,v 1.75 2005/02/07 11:27:47 harti Exp $
40 * $DragonFly: src/usr.bin/make/parse.c,v 1.99 2005/11/13 10:55:36 corecode Exp $
41 */
42
43 /*-
44 * parse.c --
45 * Functions to parse a makefile.
46 *
47 * Most important structures are kept in Lsts. Directories for
48 * the #include "..." function are kept in the 'parseIncPath' Lst, while
49 * those for the #include <...> are kept in the 'sysIncPath' Lst. The
50 * targets currently being defined are kept in the 'targets' Lst.
51 *
52 * Interface:
53 *
54 * Parse_File Function used to parse a makefile. It must
55 * be given the name of the file, which should
56 * already have been opened, and a function
57 * to call to read a character from the file.
58 *
59 * Parse_IsVar Returns true if the given line is a
60 * variable assignment. Used by MainParseArgs
61 * to determine if an argument is a target
62 * or a variable assignment. Used internally
63 * for pretty much the same thing...
64 *
65 * Parse_Error Function called when an error occurs in
66 * parsing. Used by the variable and
67 * conditional modules.
68 *
69 * Parse_MainName Returns a Lst of the main target to create.
70 */
71
72 #include <assert.h>
73 #include <ctype.h>
74 #include <stdarg.h>
75 #include <string.h>
76 #include <stdlib.h>
77 #include <err.h>
78
79 #include "arch.h"
80 #include "buf.h"
81 #include "cond.h"
82 #include "config.h"
83 #include "dir.h"
84 #include "for.h"
85 #include "globals.h"
86 #include "GNode.h"
87 #include "hash_tables.h"
88 #include "job.h"
89 #include "make.h"
90 #include "parse.h"
91 #include "pathnames.h"
92 #include "shell.h"
93 #include "str.h"
94 #include "suff.h"
95 #include "targ.h"
96 #include "util.h"
97 #include "var.h"
98
99 /*
100 * These values are returned by ParsePopInput to tell Parse_File whether to
101 * CONTINUE parsing, i.e. it had only reached the end of an include file,
102 * or if it's DONE.
103 */
104 #define CONTINUE 1
105 #define DONE 0
106
107 /* targets we're working on */
108 static Lst targets = Lst_Initializer(targets);
109
110 /* true if currently in a dependency line or its commands */
111 static bool inLine;
112
113 static int fatals = 0;
114
115 /*
116 * The main target to create. This is the first target on the
117 * first dependency line in the first makefile.
118 */
119 static GNode *mainNode;
120
121 /*
122 * Definitions for handling #include specifications
123 */
124 struct IFile {
125 char *fname; /* name of previous file */
126 int lineno; /* saved line number */
127 FILE *F; /* the open stream */
128 char *str; /* the string when parsing a string */
129 char *ptr; /* the current pointer when parsing a string */
130 TAILQ_ENTRY(IFile) link;/* stack the files */
131 };
132
133 /* stack of IFiles generated by * #includes */
134 static TAILQ_HEAD(, IFile) includes = TAILQ_HEAD_INITIALIZER(includes);
135
136 /* access current file */
137 #define CURFILE (TAILQ_FIRST(&includes))
138
139 /*
140 * specType contains the SPECial TYPE of the current target. It is
141 * Not if the target is unspecial. If it *is* special, however, the children
142 * are linked as children of the parent but not vice versa. This variable is
143 * set in ParseDoDependency
144 */
145 typedef enum {
146 Begin, /* .BEGIN */
147 Default, /* .DEFAULT */
148 End, /* .END */
149 ExportVar, /* .EXPORTVAR */
150 Ignore, /* .IGNORE */
151 Includes, /* .INCLUDES */
152 Interrupt, /* .INTERRUPT */
153 Libs, /* .LIBS */
154 MFlags, /* .MFLAGS or .MAKEFLAGS */
155 Main, /* .MAIN and we don't have anyth. user-spec. to make */
156 Not, /* Not special */
157 NotParallel, /* .NOTPARALELL */
158 Null, /* .NULL */
159 Order, /* .ORDER */
160 Parallel, /* .PARALLEL */
161 ExPath, /* .PATH */
162 Phony, /* .PHONY */
163 Posix, /* .POSIX */
164 Precious, /* .PRECIOUS */
165 ExShell, /* .SHELL */
166 Silent, /* .SILENT */
167 SingleShell, /* .SINGLESHELL */
168 Suffixes, /* .SUFFIXES */
169 Wait, /* .WAIT */
170 Warn, /* .WARN */
171 Attribute /* Generic attribute */
172 } ParseSpecial;
173
174 static ParseSpecial specType;
175 static int waiting;
176
177 /*
178 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER
179 * seen, then set to each successive source on the line.
180 */
181 static GNode *predecessor;
182
183 /*
184 * The parseKeywords table is searched using binary search when deciding
185 * if a target or source is special. The 'spec' field is the ParseSpecial
186 * type of the keyword ("Not" if the keyword isn't special as a target) while
187 * the 'op' field is the operator to apply to the list of targets if the
188 * keyword is used as a source ("0" if the keyword isn't special as a source)
189 */
190 static const struct keyword {
191 const char *name; /* Name of keyword */
192 ParseSpecial spec; /* Type when used as a target */
193 int op; /* Operator when used as a source */
194 } parseKeywords[] = {
195 /* KEYWORD-START-TAG */
196 { ".BEGIN", Begin, 0 },
197 { ".DEFAULT", Default, 0 },
198 { ".END", End, 0 },
199 { ".EXEC", Attribute, OP_EXEC },
200 { ".EXPORTVAR", ExportVar, 0 },
201 { ".IGNORE", Ignore, OP_IGNORE },
202 { ".INCLUDES", Includes, 0 },
203 { ".INTERRUPT", Interrupt, 0 },
204 { ".INVISIBLE", Attribute, OP_INVISIBLE },
205 { ".JOIN", Attribute, OP_JOIN },
206 { ".LIBS", Libs, 0 },
207 { ".MAIN", Main, 0 },
208 { ".MAKE", Attribute, OP_MAKE },
209 { ".MAKEFLAGS", MFlags, 0 },
210 { ".MFLAGS", MFlags, 0 },
211 { ".NOTMAIN", Attribute, OP_NOTMAIN },
212 { ".NOTPARALLEL", NotParallel, 0 },
213 { ".NO_PARALLEL", NotParallel, 0 },
214 { ".NULL", Null, 0 },
215 { ".OPTIONAL", Attribute, OP_OPTIONAL },
216 { ".ORDER", Order, 0 },
217 { ".PARALLEL", Parallel, 0 },
218 { ".PATH", ExPath, 0 },
219 { ".PHONY", Phony, OP_PHONY },
220 { ".POSIX", Posix, 0 },
221 { ".PRECIOUS", Precious, OP_PRECIOUS },
222 { ".RECURSIVE", Attribute, OP_MAKE },
223 { ".SHELL", ExShell, 0 },
224 { ".SILENT", Silent, OP_SILENT },
225 { ".SINGLESHELL", SingleShell, 0 },
226 { ".SUFFIXES", Suffixes, 0 },
227 { ".USE", Attribute, OP_USE },
228 { ".WAIT", Wait, 0 },
229 { ".WARN", Warn, 0 },
230 /* KEYWORD-END-TAG */
231 };
232 #define NKEYWORDS (sizeof(parseKeywords) / sizeof(parseKeywords[0]))
233
234 static DirectiveHandler parse_include;
235 static DirectiveHandler parse_message;
236 static DirectiveHandler parse_makeenv;
237 static DirectiveHandler parse_undef;
238 static DirectiveHandler parse_for;
239 static DirectiveHandler parse_endfor;
240
241 static const struct directive {
242 const char *name;
243 int code;
244 bool skip_flag; /* execute even when skipped */
245 DirectiveHandler *func;
246 } directives[] = {
247 /* DIRECTIVES-START-TAG */
248 { "elif", COND_ELIF, true, Cond_If },
249 { "elifdef", COND_ELIFDEF, true, Cond_If },
250 { "elifmake", COND_ELIFMAKE, true, Cond_If },
251 { "elifndef", COND_ELIFNDEF, true, Cond_If },
252 { "elifnmake", COND_ELIFNMAKE, true, Cond_If },
253 { "else", COND_ELSE, true, Cond_Else },
254 { "endfor", 0, false, parse_endfor },
255 { "endif", COND_ENDIF, true, Cond_Endif },
256 { "error", 1, false, parse_message },
257 { "for", 0, false, parse_for },
258 { "if", COND_IF, true, Cond_If },
259 { "ifdef", COND_IFDEF, true, Cond_If },
260 { "ifmake", COND_IFMAKE, true, Cond_If },
261 { "ifndef", COND_IFNDEF, true, Cond_If },
262 { "ifnmake", COND_IFNMAKE, true, Cond_If },
263 { "include", 0, false, parse_include },
264 { "makeenv", 0, false, parse_makeenv },
265 { "undef", 0, false, parse_undef },
266 { "warning", 0, false, parse_message },
267 /* DIRECTIVES-END-TAG */
268 };
269 #define NDIRECTS (sizeof(directives) / sizeof(directives[0]))
270
271 /*-
272 * ParseFindKeyword
273 * Look in the table of keywords for one matching the given string.
274 *
275 * Results:
276 * The pointer to keyword table entry or NULL.
277 */
278 static const struct keyword *
279 ParseFindKeyword(const char *str)
280 {
281 int kw;
282
283 kw = keyword_hash((const unsigned char *)str, strlen(str));
284 if (kw < 0 || kw >= (int)NKEYWORDS ||
285 strcmp(str, parseKeywords[kw].name) != 0)
286 return (NULL);
287 return (&parseKeywords[kw]);
288 }
289
290 /*-
291 * Parse_Error --
292 * Error message abort function for parsing. Prints out the context
293 * of the error (line number and file) as well as the message with
294 * two optional arguments.
295 *
296 * Results:
297 * None
298 *
299 * Side Effects:
300 * "fatals" is incremented if the level is PARSE_FATAL.
301 */
302 /* VARARGS */
303 void
304 Parse_Error(int type, const char *fmt, ...)
305 {
306 va_list ap;
307
308 va_start(ap, fmt);
309 if (CURFILE != NULL)
310 fprintf(stderr, "\"%s\", line %d: ",
311 CURFILE->fname, CURFILE->lineno);
312 if (type == PARSE_WARNING)
313 fprintf(stderr, "warning: ");
314 vfprintf(stderr, fmt, ap);
315 va_end(ap);
316 fprintf(stderr, "\n");
317 fflush(stderr);
318 if (type == PARSE_FATAL)
319 fatals += 1;
320 }
321
322 /**
323 * ParsePushInput
324 *
325 * Push a new input source onto the input stack. If ptr is NULL
326 * the fullname is used to fopen the file. If it is not NULL,
327 * ptr is assumed to point to the string to be parsed. If opening the
328 * file fails, the fullname is freed.
329 */
330 static void
331 ParsePushInput(char *fullname, FILE *fp, char *ptr, int lineno)
332 {
333 struct IFile *nf;
334
335 nf = emalloc(sizeof(*nf));
336 nf->fname = fullname;
337 nf->lineno = lineno;
338
339 if (ptr == NULL) {
340 /* the input source is a file */
341 if ((nf->F = fp) == NULL) {
342 nf->F = fopen(fullname, "r");
343 if (nf->F == NULL) {
344 Parse_Error(PARSE_FATAL, "Cannot open %s",
345 fullname);
346 free(fullname);
347 free(nf);
348 return;
349 }
350 }
351 nf->str = nf->ptr = NULL;
352 Var_Append(".MAKEFILE_LIST", fullname, VAR_GLOBAL);
353 } else {
354 nf->str = nf->ptr = ptr;
355 nf->F = NULL;
356 }
357 TAILQ_INSERT_HEAD(&includes, nf, link);
358 }
359
360 /**
361 * ParsePopInput
362 * Called when EOF is reached in the current file. If we were reading
363 * an include file, the includes stack is popped and things set up
364 * to go back to reading the previous file at the previous location.
365 *
366 * Results:
367 * CONTINUE if there's more to do. DONE if not.
368 *
369 * Side Effects:
370 * The old curFile.F is closed, but only if it was not a top-level
371 * file. The includes list is shortened. curFile.lineno, curFile.F,
372 * and curFile.fname are changed if CONTINUE is returned.
373 */
374 static int
375 ParsePopInput(void)
376 {
377 struct IFile *ifile; /* the state on the top of the includes stack */
378
379 assert(!TAILQ_EMPTY(&includes));
380
381 ifile = TAILQ_FIRST(&includes);
382 TAILQ_REMOVE(&includes, ifile, link);
383
384 free(ifile->fname);
385 if (ifile->F != NULL) {
386 /* Don't close the top-level file */
387 if (!TAILQ_EMPTY(&includes))
388 fclose(ifile->F);
389 Var_Append(".MAKEFILE_LIST", "..", VAR_GLOBAL);
390 }
391 if (ifile->str != NULL) {
392 free(ifile->str);
393 }
394 free(ifile);
395
396 return (TAILQ_EMPTY(&includes) ? DONE : CONTINUE);
397 }
398
399 /**
400 * parse_warn
401 * Parse the .WARN pseudo-target.
402 */
403 static void
404 parse_warn(const char line[])
405 {
406 ArgArray aa;
407 int i;
408
409 brk_string(&aa, line, true);
410
411 for (i = 1; i < aa.argc; i++)
412 Main_ParseWarn(aa.argv[i], 0);
413 }
414
415 /*-
416 *---------------------------------------------------------------------
417 * ParseLinkSrc --
418 * Link the parent nodes to their new child. Used by
419 * ParseDoDependency. If the specType isn't 'Not', the parent
420 * isn't linked as a parent of the child.
421 *
422 * Side Effects:
423 * New elements are added to the parents lists of cgn and the
424 * children list of cgn. the unmade field of pgn is updated
425 * to reflect the additional child.
426 *---------------------------------------------------------------------
427 */
428 static void
429 ParseLinkSrc(Lst *parents, GNode *cgn)
430 {
431 LstNode *ln;
432 GNode *pgn;
433
434 LST_FOREACH(ln, parents) {
435 pgn = Lst_Datum(ln);
436 if (Lst_Member(&pgn->children, cgn) == NULL) {
437 Lst_AtEnd(&pgn->children, cgn);
438 if (specType == Not) {
439 Lst_AtEnd(&cgn->parents, pgn);
440 }
441 pgn->unmade += 1;
442 }
443 }
444 }
445
446 /*-
447 *---------------------------------------------------------------------
448 * ParseDoOp --
449 * Apply the parsed operator to all target nodes. Used in
450 * ParseDoDependency once all targets have been found and their
451 * operator parsed. If the previous and new operators are incompatible,
452 * a major error is taken.
453 *
454 * Side Effects:
455 * The type field of the node is altered to reflect any new bits in
456 * the op.
457 *---------------------------------------------------------------------
458 */
459 static void
460 ParseDoOp(int op)
461 {
462 GNode *cohort;
463 LstNode *ln;
464 GNode *gn;
465
466 LST_FOREACH(ln, &targets) {
467 gn = Lst_Datum(ln);
468
469 /*
470 * If the dependency mask of the operator and the node don't
471 * match and the node has actually had an operator applied to
472 * it before, and the operator actually has some dependency
473 * information in it, complain.
474 */
475 if ((op & OP_OPMASK) != (gn->type & OP_OPMASK) &&
476 !OP_NOP(gn->type) && !OP_NOP(op)) {
477 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s",
478 gn->name);
479 return;
480 }
481
482 if (op == OP_DOUBLEDEP &&
483 (gn->type & OP_OPMASK) == OP_DOUBLEDEP) {
484 /*
485 * If the node was the object of a :: operator, we need
486 * to create a new instance of it for the children and
487 * commands on this dependency line. The new instance
488 * is placed on the 'cohorts' list of the initial one
489 * (note the initial one is not on its own cohorts list)
490 * and the new instance is linked to all parents of the
491 * initial instance.
492 */
493 cohort = Targ_NewGN(gn->name);
494
495 /*
496 * Duplicate links to parents so graph traversal is
497 * simple. Perhaps some type bits should be duplicated?
498 *
499 * Make the cohort invisible as well to avoid
500 * duplicating it into other variables. True, parents
501 * of this target won't tend to do anything with their
502 * local variables, but better safe than sorry.
503 */
504 ParseLinkSrc(&gn->parents, cohort);
505 cohort->type = OP_DOUBLEDEP|OP_INVISIBLE;
506 Lst_AtEnd(&gn->cohorts, cohort);
507
508 /*
509 * Replace the node in the targets list with the
510 * new copy
511 */
512 Lst_Replace(ln, cohort);
513 gn = cohort;
514 }
515 /*
516 * We don't want to nuke any previous flags (whatever they were)
517 * so we just OR the new operator into the old
518 */
519 gn->type |= op;
520 }
521 }
522
523 /*-
524 *---------------------------------------------------------------------
525 * ParseDoSrc --
526 * Given the name of a source, figure out if it is an attribute
527 * and apply it to the targets if it is. Else decide if there is
528 * some attribute which should be applied *to* the source because
529 * of some special target and apply it if so. Otherwise, make the
530 * source be a child of the targets in the list 'targets'
531 *
532 * Results:
533 * None
534 *
535 * Side Effects:
536 * Operator bits may be added to the list of targets or to the source.
537 * The targets may have a new source added to their lists of children.
538 *---------------------------------------------------------------------
539 */
540 static void
541 ParseDoSrc(Parser *parser, int tOp, char *src, Lst *allsrc)
542 {
543 GNode *gn = NULL;
544 const struct keyword *kw;
545
546 if (src[0] == '.' && isupper ((unsigned char)src[1])) {
547 if ((kw = ParseFindKeyword(src)) != NULL) {
548 if (kw->op != 0) {
549 ParseDoOp(kw->op);
550 return;
551 }
552 if (kw->spec == Wait) {
553 waiting++;
554 return;
555 }
556 }
557 }
558
559 switch (specType) {
560 case Main:
561 /*
562 * If we have noted the existence of a .MAIN, it means we need
563 * to add the sources of said target to the list of things
564 * to create. The string 'src' is likely to be free, so we
565 * must make a new copy of it. Note that this will only be
566 * invoked if the user didn't specify a target on the command
567 * line. This is to allow #ifmake's to succeed, or something...
568 */
569 Lst_AtEnd(parser->create, estrdup(src));
570 /*
571 * Add the name to the .TARGETS variable as well, so the user
572 * can employ that, if desired.
573 */
574 Var_Append(".TARGETS", src, VAR_GLOBAL);
575 return;
576
577 case Order:
578 /*
579 * Create proper predecessor/successor links between the
580 * previous source and the current one.
581 */
582 gn = Targ_FindNode(src, TARG_CREATE);
583 if (predecessor != NULL) {
584 Lst_AtEnd(&predecessor->successors, gn);
585 Lst_AtEnd(&gn->preds, predecessor);
586 }
587 /*
588 * The current source now becomes the predecessor for the next
589 * one.
590 */
591 predecessor = gn;
592 break;
593
594 default:
595 /*
596 * If the source is not an attribute, we need to find/create
597 * a node for it. After that we can apply any operator to it
598 * from a special target or link it to its parents, as
599 * appropriate.
600 *
601 * In the case of a source that was the object of a :: operator,
602 * the attribute is applied to all of its instances (as kept in
603 * the 'cohorts' list of the node) or all the cohorts are linked
604 * to all the targets.
605 */
606 gn = Targ_FindNode(src, TARG_CREATE);
607 if (tOp) {
608 gn->type |= tOp;
609 } else {
610 ParseLinkSrc(&targets, gn);
611 }
612 if ((gn->type & OP_OPMASK) == OP_DOUBLEDEP) {
613 GNode *cohort;
614 LstNode *ln;
615
616 for (ln = Lst_First(&gn->cohorts); ln != NULL;
617 ln = Lst_Succ(ln)) {
618 cohort = Lst_Datum(ln);
619 if (tOp) {
620 cohort->type |= tOp;
621 } else {
622 ParseLinkSrc(&targets, cohort);
623 }
624 }
625 }
626 break;
627 }
628
629 gn->order = waiting;
630 Lst_AtEnd(allsrc, gn);
631 if (waiting) {
632 LstNode *ln;
633 GNode *p;
634
635 /*
636 * Check if GNodes needs to be synchronized.
637 * This has to be when two nodes are on different sides of a
638 * .WAIT directive.
639 */
640 LST_FOREACH(ln, allsrc) {
641 p = Lst_Datum(ln);
642
643 if (p->order >= gn->order)
644 break;
645 /*
646 * XXX: This can cause loops, and loops can cause
647 * unmade targets, but checking is tedious, and the
648 * debugging output can show the problem
649 */
650 Lst_AtEnd(&p->successors, gn);
651 Lst_AtEnd(&gn->preds, p);
652 }
653 }
654 }
655
656
657 /*-
658 *---------------------------------------------------------------------
659 * ParseDoDependency --
660 * Parse the dependency line in line.
661 *
662 * Results:
663 * None
664 *
665 * Side Effects:
666 * The nodes of the sources are linked as children to the nodes of the
667 * targets. Some nodes may be created.
668 *
669 * We parse a dependency line by first extracting words from the line and
670 * finding nodes in the list of all targets with that name. This is done
671 * until a character is encountered which is an operator character. Currently
672 * these are only ! and :. At this point the operator is parsed and the
673 * pointer into the line advanced until the first source is encountered.
674 * The parsed operator is applied to each node in the 'targets' list,
675 * which is where the nodes found for the targets are kept, by means of
676 * the ParseDoOp function.
677 * The sources are read in much the same way as the targets were except
678 * that now they are expanded using the wildcarding scheme of the C-Shell
679 * and all instances of the resulting words in the list of all targets
680 * are found. Each of the resulting nodes is then linked to each of the
681 * targets as one of its children.
682 * Certain targets are handled specially. These are the ones detailed
683 * by the specType variable.
684 * The storing of transformation rules is also taken care of here.
685 * A target is recognized as a transformation rule by calling
686 * Suff_IsTransform. If it is a transformation rule, its node is gotten
687 * from the suffix module via Suff_AddTransform rather than the standard
688 * Targ_FindNode in the target module.
689 *---------------------------------------------------------------------
690 */
691 static void
692 ParseDoDependency(Parser *parser, struct CLI *cli, char line[])
693 {
694 char *cp; /* our current position */
695 GNode *gn; /* a general purpose temporary node */
696 int op; /* the operator on the line */
697 char savec; /* a place to save a character */
698 Lst paths; /* Search paths to alter when parsing .PATH targets */
699 int tOp; /* operator from special target */
700 LstNode *ln;
701 const struct keyword *kw;
702
703 tOp = 0;
704
705 specType = Not;
706 waiting = 0;
707 Lst_Init(&paths);
708
709 do {
710 for (cp = line;
711 *cp && !isspace((unsigned char)*cp) && *cp != OPEN_PAREN;
712 cp++) {
713 if (*cp == '$') {
714 /*
715 * Must be a dynamic source (would have been
716 * expanded otherwise), so call the Var module
717 * to parse the puppy so we can safely advance
718 * beyond it...There should be no errors in this
719 * as they would have been discovered in the
720 * initial Var_Subst and we wouldn't be here.
721 */
722 size_t length = 0;
723 bool freeIt;
724 char *result;
725
726 result = Var_Parse(cp, VAR_CMD, true,
727 &length, &freeIt);
728
729 if (freeIt) {
730 free(result);
731 }
732 cp += length - 1;
733
734 } else if (*cp == '!' || *cp == ':') {
735 /*
736 * We don't want to end a word on ':' or '!' if
737 * there is a better match later on in the
738 * string (greedy matching).
739 * This allows the user to have targets like:
740 * fie::fi:fo: fum
741 * foo::bar:
742 * where "fie::fi:fo" and "foo::bar" are the
743 * targets. In real life this is used for perl5
744 * library man pages where "::" separates an
745 * object from its class. Ie:
746 * "File::Spec::Unix". This behaviour is also
747 * consistent with other versions of make.
748 */
749 char *p = cp + 1;
750
751 if (*cp == ':' && *p == ':')
752 p++;
753
754 /* Found the best match already. */
755 if (*p == '\0' || isspace((unsigned char)*p))
756 break;
757
758 p += strcspn(p, "!:");
759
760 /* No better match later on... */
761 if (*p == '\0')
762 break;
763 }
764 continue;
765 }
766 if (*cp == OPEN_PAREN) {
767 /*
768 * Archives must be handled specially to make sure the
769 * OP_ARCHV flag is set in their 'type' field, for one
770 * thing, and because things like "archive(file1.o
771 * file2.o file3.o)" are permissible. Arch_ParseArchive
772 * will set 'line' to be the first non-blank after the
773 * archive-spec. It creates/finds nodes for the members
774 * and places them on the given list, returning true
775 * if all went well and false if there was an error in
776 * the specification. On error, line should remain
777 * untouched.
778 */
779 if (!Arch_ParseArchive(&line, &targets, VAR_CMD)) {
780 Parse_Error(PARSE_FATAL,
781 "Error in archive specification: \"%s\"",
782 line);
783 return;
784 } else {
785 cp = line;
786 continue;
787 }
788 }
789 savec = *cp;
790
791 if (!*cp) {
792 /*
793 * Ending a dependency line without an operator is a * Bozo no-no. As a heuristic, this is also often
794 * triggered by undetected conflicts from cvs/rcs
795 * merges.
796 */
797 if (strncmp(line, "<<<<<<", 6) == 0 ||
798 strncmp(line, "======", 6) == 0 ||
799 strncmp(line, ">>>>>>", 6) == 0) {
800 Parse_Error(PARSE_FATAL, "Makefile appears to "
801 "contain unresolved cvs/rcs/??? merge "
802 "conflicts");
803 } else
804 Parse_Error(PARSE_FATAL, "Need an operator");
805 return;
806 }
807 *cp = '\0';
808 /*
809 * Have a word in line. See if it's a special target and set
810 * specType to match it.
811 */
812 if (*line == '.' && isupper((unsigned char)line[1])) {
813 /*
814 * See if the target is a special target that must have
815 * it or its sources handled specially.
816 */
817 if ((kw = ParseFindKeyword(line)) != NULL) {
818 if (specType == ExPath && kw->spec != ExPath) {
819 Parse_Error(PARSE_FATAL,
820 "Mismatched special targets");
821 return;
822 }
823
824 specType = kw->spec;
825 tOp = kw->op;
826
827 /*
828 * Certain special targets have special
829 * semantics:
830 * .PATH Have to set the dirSearchPath
831 * variable too
832 * .MAIN Its sources are only used if
833 * nothing has been specified to
834 * create.
835 * .DEFAULT Need to create a node to hang
836 * commands on, but we don't want
837 * it in the graph, nor do we want
838 * it to be the Main Target, so we
839 * create it, set OP_NOTMAIN and
840 * add it to the list, setting
841 * DEFAULT to the new node for
842 * later use. We claim the node is
843 * A transformation rule to make
844 * life easier later, when we'll
845 * use Make_HandleUse to actually
846 * apply the .DEFAULT commands.
847 * .PHONY The list of targets
848 * .BEGIN
849 * .END
850 * .INTERRUPT Are not to be considered the
851 * main target.
852 * .NOTPARALLEL Make only one target at a time.
853 * .SINGLESHELL Create a shell for each
854 * command.
855 * .ORDER Must set initial predecessor
856 * to NULL
857 */
858 switch (specType) {
859 case ExPath:
860 Lst_AtEnd(&paths, &dirSearchPath);
861 break;
862 case Main:
863 if (!Lst_IsEmpty(parser->create)) {
864 specType = Not;
865 }
866 break;
867 case Begin:
868 case End:
869 case Interrupt:
870 gn = Targ_FindNode(line, TARG_CREATE);
871 gn->type |= OP_NOTMAIN;
872 Lst_AtEnd(&targets, gn);
873 break;
874 case Default:
875 gn = Targ_NewGN(".DEFAULT");
876 gn->type |= (OP_NOTMAIN|OP_TRANSFORM);
877 Lst_AtEnd(&targets, gn);
878 DEFAULT = gn;
879 break;
880 case NotParallel:
881 jobLimit = 1;
882 break;
883 case SingleShell:
884 compatMake = 1;
885 break;
886 case Order:
887 predecessor = NULL;
888 break;
889 default:
890 break;
891 }
892
893 } else if (strncmp(line, ".PATH", 5) == 0) {
894 /*
895 * .PATH<suffix> has to be handled specially.
896 * Call on the suffix module to give us a path
897 * to modify.
898 */
899 struct Path *path;
900
901 specType = ExPath;
902 path = Suff_GetPath(&line[5]);
903 if (path == NULL) {
904 Parse_Error(PARSE_FATAL, "Suffix '%s' "
905 "not defined (yet)", &line[5]);
906 return;
907 } else
908 Lst_AtEnd(&paths, path);
909 }
910 }
911
912 /*
913 * Have word in line. Get or create its node and stick it at
914 * the end of the targets list
915 */
916 if (specType == Not && *line != '\0') {
917
918 /* target names to be found and added to targets list */
919 Lst curTargs = Lst_Initializer(curTargs);
920
921 if (Dir_HasWildcards(line)) {
922 /*
923 * Targets are to be sought only in the current
924 * directory, so create an empty path for the
925 * thing. Note we need to use Path_Clear in the
926 * destruction of the path as the Dir module
927 * could have added a directory to the path...
928 */
929 struct Path emptyPath =
930 TAILQ_HEAD_INITIALIZER(emptyPath);
931
932 Path_Expand(line, &emptyPath, &curTargs);
933 Path_Clear(&emptyPath);
934
935 } else {
936 /*
937 * No wildcards, but we want to avoid code
938 * duplication, so create a list with the word
939 * on it.
940 */
941 Lst_AtEnd(&curTargs, line);
942 }
943
944 while (!Lst_IsEmpty(&curTargs)) {
945 char *targName = Lst_DeQueue(&curTargs);
946
947 if (!Suff_IsTransform (targName)) {
948 gn = Targ_FindNode(targName,
949 TARG_CREATE);
950 } else {
951 gn = Suff_AddTransform(targName);
952 }
953
954 Lst_AtEnd(&targets, gn);
955 }
956 } else if (specType == ExPath && *line != '.' && *line != '\0'){
957 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored",
958 line);
959 }
960
961 *cp = savec;
962 /*
963 * If it is a special type and not .PATH, it's the only
964 * target we allow on this line...
965 */
966 if (specType != Not && specType != ExPath) {
967 bool warnFlag = false;
968
969 while (*cp != '!' && *cp != ':' && *cp) {
970 if (*cp != ' ' && *cp != '\t') {
971 warnFlag = true;
972 }
973 cp++;
974 }
975 if (warnFlag) {
976 Parse_Error(PARSE_WARNING,
977 "Extra target ignored");
978 }
979 } else {
980 while (*cp && isspace((unsigned char)*cp)) {
981 cp++;
982 }
983 }
984 line = cp;
985 } while (*line != '!' && *line != ':' && *line);
986
987 if (!Lst_IsEmpty(&targets)) {
988 switch (specType) {
989 default:
990 Parse_Error(PARSE_WARNING, "Special and mundane "
991 "targets don't mix. Mundane ones ignored");
992 break;
993 case Default:
994 case Begin:
995 case End:
996 case Interrupt:
997 /*
998 * These four create nodes on which to hang commands, so
999 * targets shouldn't be empty...
1000 */
1001 case Not:
1002 /*
1003 * Nothing special here -- targets can be empty if it
1004 * wants.
1005 */
1006 break;
1007 }
1008 }
1009
1010 /*
1011 * Have now parsed all the target names. Must parse the operator next.
1012 * The result is left in op.
1013 */
1014 if (*cp == '!') {
1015 op = OP_FORCE;
1016 } else if (*cp == ':') {
1017 if (cp[1] == ':') {
1018 op = OP_DOUBLEDEP;
1019 cp++;
1020 } else {
1021 op = OP_DEPENDS;
1022 }
1023 } else {
1024 Parse_Error(PARSE_FATAL, "Missing dependency operator");
1025 return;
1026 }
1027
1028 cp++; /* Advance beyond operator */
1029
1030 ParseDoOp(op);
1031
1032 /*
1033 * Get to the first source
1034 */
1035 while (*cp && isspace((unsigned char)*cp)) {
1036 cp++;
1037 }
1038 line = cp;
1039
1040 /*
1041 * Several special targets take different actions if present with no
1042 * sources:
1043 * a .SUFFIXES line with no sources clears out all old suffixes
1044 * a .PRECIOUS line makes all targets precious
1045 * a .IGNORE line ignores errors for all targets
1046 * a .SILENT line creates silence when making all targets
1047 * a .PATH removes all directories from the search path(s).
1048 */
1049 if (!*line) {
1050 switch (specType) {
1051 case Suffixes:
1052 Suff_ClearSuffixes();
1053 break;
1054 case Precious:
1055 allPrecious = true;
1056 break;
1057 case Ignore:
1058 ignoreErrors = true;
1059 break;
1060 case Silent:
1061 beSilent = true;
1062 break;
1063 case ExPath:
1064 LST_FOREACH(ln, &paths)
1065 Path_Clear(Lst_Datum(ln));
1066 break;
1067 case Posix:
1068 Var_SetGlobal("%POSIX", "1003.2");
1069 break;
1070 default:
1071 break;
1072 }
1073
1074 } else if (specType == MFlags) {
1075 /*
1076 * Call on functions in main.c to deal with these arguments and
1077 * set the initial character to a null-character so the loop to
1078 * get sources won't get anything
1079 */
1080 Main_ParseArgLine(cli, line, 0);
1081 *line = '\0';
1082
1083 } else if (specType == Warn) {
1084 parse_warn(line);
1085 *line = '\0';
1086
1087 } else if (specType == ExShell) {
1088 Shell *shell;
1089
1090 if ((shell = Shell_Parse(line)) == NULL) {
1091 Parse_Error(PARSE_FATAL,
1092 "improper shell specification");
1093 return;
1094 }
1095 commandShell = shell;
1096 *line = '\0';
1097
1098 } else if (specType == NotParallel || specType == SingleShell) {
1099 *line = '\0';
1100 }
1101
1102 /*
1103 * NOW GO FOR THE SOURCES
1104 */
1105 if (specType == Suffixes || specType == ExPath ||
1106 specType == Includes || specType == Libs ||
1107 specType == Null) {
1108 while (*line) {
1109 /*
1110 * If the target was one that doesn't take files as its
1111 * sources but takes something like suffixes, we take
1112 * each space-separated word on the line as a something
1113 * and deal with it accordingly.
1114 *
1115 * If the target was .SUFFIXES, we take each source as
1116 * a suffix and add it to the list of suffixes
1117 * maintained by the Suff module.
1118 *
1119 * If the target was a .PATH, we add the source as a
1120 * directory to search on the search path.
1121 *
1122 * If it was .INCLUDES, the source is taken to be the
1123 * suffix of files which will be #included and whose
1124 * search path should be present in the .INCLUDES
1125 * variable.
1126 *
1127 * If it was .LIBS, the source is taken to be the
1128 * suffix of files which are considered libraries and
1129 * whose search path should be present in the .LIBS
1130 * variable.
1131 *
1132 * If it was .NULL, the source is the suffix to use
1133 * when a file has no valid suffix.
1134 */
1135 char savech;
1136 while (*cp && !isspace((unsigned char)*cp)) {
1137 cp++;
1138 }
1139 savech = *cp;
1140 *cp = '\0';
1141 switch (specType) {
1142 case Suffixes:
1143 Suff_AddSuffix(line);
1144 break;
1145 case ExPath:
1146 LST_FOREACH(ln, &paths)
1147 Path_AddDir(Lst_Datum(ln), line);
1148 break;
1149 case Includes:
1150 Suff_AddInclude(line);
1151 break;
1152 case Libs:
1153 Suff_AddLib(line);
1154 break;
1155 case Null:
1156 Suff_SetNull(line);
1157 break;
1158 default:
1159 break;
1160 }
1161 *cp = savech;
1162 if (savech != '\0') {
1163 cp++;
1164 }
1165 while (*cp && isspace((unsigned char)*cp)) {
1166 cp++;
1167 }
1168 line = cp;
1169 }
1170 Lst_Destroy(&paths, NOFREE);
1171
1172 } else if (specType == ExportVar) {
1173 Var_SetEnv(line, VAR_GLOBAL);
1174
1175 } else {
1176 /* list of sources in order */
1177 Lst curSrcs = Lst_Initializer(curSrc);
1178
1179 while (*line) {
1180 /*
1181 * The targets take real sources, so we must beware of
1182 * archive specifications (i.e. things with left
1183 * parentheses in them) and handle them accordingly.
1184 */
1185 while (*cp && !isspace((unsigned char)*cp)) {
1186 if (*cp == OPEN_PAREN && cp > line && cp[-1] != '$') {
1187 /*
1188 * Only stop for a left parenthesis if
1189 * it isn't at the start of a word
1190 * (that'll be for variable changes
1191 * later) and isn't preceded by a dollar
1192 * sign (a dynamic source).
1193 */
1194 break;
1195 } else {
1196 cp++;
1197 }
1198 }
1199
1200 if (*cp == OPEN_PAREN) {
1201 GNode *gnp;
1202
1203 /* list of archive source names after exp. */
1204 Lst sources = Lst_Initializer(sources);
1205
1206 if (!Arch_ParseArchive(&line, &sources,
1207 VAR_CMD)) {
1208 Parse_Error(PARSE_FATAL, "Error in "
1209 "source archive spec \"%s\"", line);
1210 return;
1211 }
1212
1213 while (!Lst_IsEmpty(&sources)) {
1214 gnp = Lst_DeQueue(&sources);
1215 ParseDoSrc(parser, tOp, gnp->name, &curSrcs);
1216 }
1217 cp = line;
1218 } else {
1219 if (*cp) {
1220 *cp = '\0';
1221 cp += 1;
1222 }
1223
1224 ParseDoSrc(parser, tOp, line, &curSrcs);
1225 }
1226 while (*cp && isspace((unsigned char)*cp)) {
1227 cp++;
1228 }
1229 line = cp;
1230 }
1231 Lst_Destroy(&curSrcs, NOFREE);
1232 }
1233
1234 if (mainNode == NULL) {
1235 /*
1236 * If we have yet to decide on a main target to make, in the
1237 * absence of any user input, we want the first target on
1238 * the first dependency line that is actually a real target
1239 * (i.e. isn't a .USE or .EXEC rule) to be made.
1240 */
1241 LST_FOREACH(ln, &targets) {
1242 gn = Lst_Datum(ln);
1243 if ((gn->type & (OP_NOTMAIN | OP_USE |
1244 OP_EXEC | OP_TRANSFORM)) == 0) {
1245 mainNode = gn;
1246 Targ_SetMain(gn);
1247 break;
1248 }
1249 }
1250 }
1251 }
1252
1253 /*-
1254 *---------------------------------------------------------------------
1255 * Parse_IsVar --
1256 * Return true if the passed line is a variable assignment. A variable
1257 * assignment consists of a single word followed by optional whitespace
1258 * followed by either a += or an = operator.
1259 * This function is used both by the Parse_File function and main when
1260 * parsing the command-line arguments.
1261 *
1262 * Results:
1263 * true if it is. false if it ain't
1264 *
1265 * Side Effects:
1266 * none
1267 *---------------------------------------------------------------------
1268 */
1269 bool
1270 Parse_IsVar(char *line)
1271 {
1272 bool wasSpace = false; /* set true if found a space */
1273 bool haveName = false; /* Set true if have a variable name */
1274
1275 int level = 0;
1276 #define ISEQOPERATOR(c) \
1277 ((c) == '+' || (c) == ':' || (c) == '?' || (c) == '!')
1278
1279 /*
1280 * Skip to variable name
1281 */
1282 for (; *line == ' ' || *line == '\t'; line++)
1283 continue;
1284
1285 for (; *line != '=' || level != 0; line++) {
1286 switch (*line) {
1287 case '\0':
1288 /*
1289 * end-of-line -- can't be a variable assignment.
1290 */
1291 return (false);
1292
1293 case ' ':
1294 case '\t':
1295 /*
1296 * there can be as much white space as desired so long
1297 * as there is only one word before the operator
1298 */
1299 wasSpace = true;
1300 break;
1301
1302 case OPEN_PAREN:
1303 case OPEN_BRACE:
1304 level++;
1305 break;
1306
1307 case CLOSE_BRACE:
1308 case CLOSE_PAREN:
1309 level--;
1310 break;
1311
1312 default:
1313 if (wasSpace && haveName) {
1314 if (ISEQOPERATOR(*line)) {
1315 /*
1316 * We must have a finished word
1317 */
1318 if (level != 0)
1319 return (false);
1320
1321 /*
1322 * When an = operator [+?!:] is found,
1323 * the next character must be an = or
1324 * it ain't a valid assignment.
1325 */
1326 if (line[1] == '=')
1327 return (haveName);
1328 #ifdef SUNSHCMD
1329 /*
1330 * This is a shell command
1331 */
1332 if (strncmp(line, ":sh", 3) == 0)
1333 return (haveName);
1334 #endif
1335 }
1336 /*
1337 * This is the start of another word, so not
1338 * assignment.
1339 */
1340 return (false);
1341
1342 } else {
1343 haveName = true;
1344 wasSpace = false;
1345 }
1346 break;
1347 }
1348 }
1349
1350 return (haveName);
1351 }
1352
1353 /*-
1354 *---------------------------------------------------------------------
1355 * Parse_DoVar --
1356 * Take the variable assignment in the passed line and do it in the
1357 * global context.
1358 *
1359 * Note: There is a lexical ambiguity with assignment modifier characters
1360 * in variable names. This routine interprets the character before the =
1361 * as a modifier. Therefore, an assignment like
1362 * C++=/usr/bin/CC
1363 * is interpreted as "C+ +=" instead of "C++ =".
1364 *
1365 * Results:
1366 * none
1367 *
1368 * Side Effects:
1369 * the variable structure of the given variable name is altered in the
1370 * global context.
1371 *---------------------------------------------------------------------
1372 */
1373 void
1374 Parse_DoVar(char *line, GNode *ctxt)
1375 {
1376 char *cp; /* pointer into line */
1377 enum {
1378 VAR_SUBST,
1379 VAR_APPEND,
1380 VAR_SHELL,
1381 VAR_NORMAL
1382 } type; /* Type of assignment */
1383 char *opc; /* ptr to operator character to
1384 * null-terminate the variable name */
1385
1386 /*
1387 * Skip to variable name
1388 */
1389 while (*line == ' ' || *line == '\t') {
1390 line++;
1391 }
1392
1393 /*
1394 * Skip to operator character, nulling out whitespace as we go
1395 */
1396 for (cp = line + 1; *cp != '='; cp++) {
1397 if (isspace((unsigned char)*cp)) {
1398 *cp = '\0';
1399 }
1400 }
1401 opc = cp - 1; /* operator is the previous character */
1402 *cp++ = '\0'; /* nuke the = */
1403
1404 /*
1405 * Check operator type
1406 */
1407 switch (*opc) {
1408 case '+':
1409 type = VAR_APPEND;
1410 *opc = '\0';
1411 break;
1412
1413 case '?':
1414 /*
1415 * If the variable already has a value, we don't do anything.
1416 */
1417 *opc = '\0';
1418 if (Var_Value(line, ctxt) != NULL) {
1419 return;
1420 } else {
1421 type = VAR_NORMAL;
1422 }
1423 break;
1424
1425 case ':':
1426 type = VAR_SUBST;
1427 *opc = '\0';
1428 break;
1429
1430 case '!':
1431 type = VAR_SHELL;
1432 *opc = '\0';
1433 break;
1434
1435 default:
1436 #ifdef SUNSHCMD
1437 while (*opc != ':') {
1438 if (opc == line)
1439 break;
1440 else
1441 --opc;
1442 }
1443
1444 if (strncmp(opc, ":sh", 3) == 0) {
1445 type = VAR_SHELL;
1446 *opc = '\0';
1447 break;
1448 }
1449 #endif
1450 type = VAR_NORMAL;
1451 break;
1452 }
1453
1454 while (isspace((unsigned char)*cp)) {
1455 cp++;
1456 }
1457
1458 if (type == VAR_APPEND) {
1459 Var_Append(line, cp, ctxt);
1460
1461 } else if (type == VAR_SUBST) {
1462 /*
1463 * Allow variables in the old value to be undefined, but leave
1464 * their invocation alone -- this is done by forcing oldVars
1465 * to be false.
1466 * XXX: This can cause recursive variables, but that's not
1467 * hard to do, and this allows someone to do something like
1468 *
1469 * CFLAGS = $(.INCLUDES)
1470 * CFLAGS := -I.. $(CFLAGS)
1471 *
1472 * And not get an error.
1473 */
1474 bool oldOldVars = oldVars;
1475
1476 oldVars = false;
1477
1478 /*
1479 * make sure that we set the variable the first time to nothing
1480 * so that it gets substituted!
1481 */
1482 if (Var_Value(line, ctxt) == NULL)
1483 Var_Set(line, "", ctxt);
1484
1485 cp = Buf_Peel(Var_Subst(cp, ctxt, false));
1486
1487 oldVars = oldOldVars;
1488
1489 Var_Set(line, cp, ctxt);
1490 free(cp);
1491
1492 } else if (type == VAR_SHELL) {
1493 /*
1494 * true if the command needs to be freed, i.e.
1495 * if any variable expansion was performed
1496 */
1497 bool freeCmd = false;
1498 Buffer *buf;
1499 const char *error;
1500
1501 if (strchr(cp, '$') != NULL) {
1502 /*
1503 * There's a dollar sign in the command, so perform
1504 * variable expansion on the whole thing. The
1505 * resulting string will need freeing when we're done,
1506 * so set freeCmd to true.
1507 */
1508 cp = Buf_Peel(Var_Subst(cp, VAR_CMD, true));
1509 freeCmd = true;
1510 }
1511
1512 buf = Cmd_Exec(cp, &error);
1513 Var_Set(line, Buf_Data(buf), ctxt);
1514 Buf_Destroy(buf, true);
1515
1516 if (error)
1517 Parse_Error(PARSE_WARNING, error, cp);
1518
1519 if (freeCmd)
1520 free(cp);
1521
1522 } else {
1523 /*
1524 * Normal assignment -- just do it.
1525 */
1526 Var_Set(line, cp, ctxt);
1527 }
1528 }
1529
1530 /*-
1531 *-----------------------------------------------------------------------
1532 * ParseHasCommands --
1533 * Callback procedure for Parse_File when destroying the list of
1534 * targets on the last dependency line. Marks a target as already
1535 * having commands if it does, to keep from having shell commands
1536 * on multiple dependency lines.
1537 *
1538 * Results:
1539 * None
1540 *
1541 * Side Effects:
1542 * OP_HAS_COMMANDS may be set for the target.
1543 *
1544 *-----------------------------------------------------------------------
1545 */
1546 static void
1547 ParseHasCommands(void *gnp)
1548 {
1549 GNode *gn = gnp;
1550
1551 if (!Lst_IsEmpty(&gn->commands)) {
1552 gn->type |= OP_HAS_COMMANDS;
1553 }
1554 }
1555
1556 /*-
1557 *---------------------------------------------------------------------
1558 * Parse_FromString --
1559 * Start Parsing from the given string
1560 *
1561 * Results:
1562 * None
1563 *
1564 * Side Effects:
1565 * A structure is added to the includes Lst and readProc, curFile.lineno,
1566 * curFile.fname and curFile.F are altered for the new file
1567 *---------------------------------------------------------------------
1568 */
1569 void
1570 Parse_FromString(char *str, int lineno)
1571 {
1572
1573 DEBUGF(FOR, ("%s\n---- at line %d\n", str, lineno));
1574
1575 ParsePushInput(estrdup(CURFILE->fname), NULL, str, lineno);
1576 }
1577
1578 #ifdef SYSVINCLUDE
1579 /*-
1580 *---------------------------------------------------------------------
1581 * ParseTraditionalInclude --
1582 * Push to another file.
1583 *
1584 * The input is the line minus the "include". The file name is
1585 * the string following the "include".
1586 *
1587 * Results:
1588 * None
1589 *
1590 * Side Effects:
1591 * A structure is added to the includes Lst and readProc, curFile.lineno,
1592 * curFile.fname and curFile.F are altered for the new file
1593 *---------------------------------------------------------------------
1594 */
1595 static void
1596 ParseTraditionalInclude(Parser *parser, char *file)
1597 {
1598 char *fullname; /* full pathname of file */
1599 char *cp; /* current position in file spec */
1600
1601 /*
1602 * Skip over whitespace
1603 */
1604 while (*file == ' ' || *file == '\t') {
1605 file++;
1606 }
1607
1608 if (*file == '\0') {
1609 Parse_Error(PARSE_FATAL, "Filename missing from \"include\"");
1610 return;
1611 }
1612
1613 /*
1614 * Skip to end of line or next whitespace
1615 */
1616 for (cp = file; *cp && *cp != '\n' && *cp != '\t' && *cp != ' '; cp++) {
1617 continue;
1618 }
1619
1620 *cp = '\0';
1621
1622 /*
1623 * Substitute for any variables in the file name before trying to
1624 * find the thing.
1625 */
1626 file = Buf_Peel(Var_Subst(file, VAR_CMD, false));
1627
1628 /*
1629 * Now we know the file's name, we attempt to find the durn thing.
1630 * Search for it first on the -I search path, then on the .PATH
1631 * search path, if not found in a -I directory.
1632 */
1633 fullname = Path_FindFile(file, parser->parseIncPath);
1634 if (fullname == NULL) {
1635 fullname = Path_FindFile(file, &dirSearchPath);
1636 }
1637
1638 if (fullname == NULL) {
1639 /*
1640 * Still haven't found the makefile. Look for it on the system
1641 * path as a last resort.
1642 */
1643 fullname = Path_FindFile(file, parser->sysIncPath);
1644 }
1645
1646 if (fullname == NULL) {
1647 Parse_Error(PARSE_FATAL, "Could not find %s", file);
1648 /* XXXHB free(file) */
1649 return;
1650 }
1651
1652 /* XXXHB free(file) */
1653
1654 /*
1655 * We set up the name of the file to be the absolute
1656 * name of the include file so error messages refer to the right
1657 * place.
1658 */
1659 ParsePushInput(fullname, NULL, NULL, 0);
1660 }
1661 #endif
1662
1663 /*-
1664 *---------------------------------------------------------------------
1665 * ParseReadc --
1666 * Read a character from the current file
1667 *
1668 * Results:
1669 * The character that was read
1670 *
1671 * Side Effects:
1672 *---------------------------------------------------------------------
1673 */
1674 static int
1675 ParseReadc(void)
1676 {
1677
1678 if (CURFILE->F != NULL)
1679 return (fgetc(CURFILE->F));
1680
1681 if (CURFILE->str != NULL && *CURFILE->ptr != '\0')
1682 return (*CURFILE->ptr++);
1683
1684 return (EOF);
1685 }
1686
1687
1688 /*-
1689 *---------------------------------------------------------------------
1690 * ParseUnreadc --
1691 * Put back a character to the current file
1692 *
1693 * Results:
1694 * None.
1695 *
1696 * Side Effects:
1697 *---------------------------------------------------------------------
1698 */
1699 static void
1700 ParseUnreadc(int c)
1701 {
1702
1703 if (CURFILE->F != NULL) {
1704 ungetc(c, CURFILE->F);
1705 return;
1706 }
1707 if (CURFILE->str != NULL) {
1708 *--(CURFILE->ptr) = c;
1709 return;
1710 }
1711 }
1712
1713 /* ParseSkipLine():
1714 * Grab the next line unless it begins with a dot (`.') and we're told to
1715 * ignore such lines.
1716 */
1717 static char *
1718 ParseSkipLine(int skip, int keep_newline)
1719 {
1720 char *line;
1721 int c, lastc;
1722 Buffer *buf;
1723
1724 buf = Buf_Init(MAKE_BSIZE);
1725
1726 do {
1727 Buf_Clear(buf);
1728 lastc = '\0';
1729
1730 while (((c = ParseReadc()) != '\n' || lastc == '\\')
1731 && c != EOF) {
1732 if (skip && c == '#' && lastc != '\\') {
1733 /*
1734 * let a comment be terminated even by an
1735 * escaped \n. This is consistent to comment
1736 * handling in ParseReadLine
1737 */
1738 while ((c = ParseReadc()) != '\n' && c != EOF)
1739 ;
1740 break;
1741 }
1742 if (c == '\n') {
1743 if (keep_newline)
1744 Buf_AddByte(buf, c);
1745 else
1746 Buf_ReplaceLastByte(buf, ' ');
1747 CURFILE->lineno++;
1748
1749 while ((c = ParseReadc()) == ' ' || c == '\t')
1750 continue;
1751
1752 if (c == EOF)
1753 break;
1754 }
1755
1756 Buf_AddByte(buf, c);
1757 lastc = c;
1758 }
1759
1760 if (c == EOF) {
1761 Parse_Error(PARSE_FATAL,
1762 "Unclosed conditional/for loop");
1763 Buf_Destroy(buf, true);
1764 return (NULL);
1765 }
1766
1767 CURFILE->lineno++;
1768 Buf_AddByte(buf, '\0');
1769 line = Buf_Data(buf);
1770 } while (skip == 1 && line[0] != '.');
1771
1772 Buf_Destroy(buf, false);
1773 return (line);
1774 }
1775
1776 /*-
1777 *---------------------------------------------------------------------
1778 * ParseReadLine --
1779 * Read an entire line from the input file. Called only by Parse_File.
1780 * To facilitate escaped newlines and what have you, a character is
1781 * buffered in 'lastc', which is '\0' when no characters have been
1782 * read. When we break out of the loop, c holds the terminating
1783 * character and lastc holds a character that should be added to
1784 * the line (unless we don't read anything but a terminator).
1785 *
1786 * Results:
1787 * A line w/o its newline
1788 *
1789 * Side Effects:
1790 * Only those associated with reading a character
1791 *---------------------------------------------------------------------
1792 */
1793 static char *
1794 ParseReadLine(void)
1795 {
1796 Buffer *buf; /* Buffer for current line */
1797 int c; /* the current character */
1798 int lastc; /* The most-recent character */
1799 bool semiNL; /* treat semi-colons as newlines */
1800 bool ignDepOp; /* true if should ignore dependency operators
1801 * for the purposes of setting semiNL */
1802 bool ignComment; /* true if should ignore comments (in a
1803 * shell command */
1804 char *line; /* Result */
1805 char *ep; /* to strip trailing blanks */
1806
1807 again:
1808 semiNL = false;
1809 ignDepOp = false;
1810 ignComment = false;
1811
1812 lastc = '\0';
1813
1814 /*
1815 * Handle tab at the beginning of the line. A leading tab (shell
1816 * command) forces us to ignore comments and dependency operators and
1817 * treat semi-colons as semi-colons (by leaving semiNL false).
1818 * This also discards completely blank lines.
1819 */
1820 for (;;) {
1821 c = ParseReadc();
1822 if (c == EOF) {
1823 if (ParsePopInput() == DONE) {
1824 /* End of all inputs - return NULL */
1825 return (NULL);
1826 }
1827 continue;
1828 }
1829
1830 if (c == '\t') {
1831 ignComment = ignDepOp = true;
1832 lastc = c;
1833 break;
1834 }
1835 if (c != '\n') {
1836 ParseUnreadc(c);
1837 break;
1838 }
1839 CURFILE->lineno++;
1840 }
1841
1842 buf = Buf_Init(MAKE_BSIZE);
1843
1844 while (((c = ParseReadc()) != '\n' || lastc == '\\') && c != EOF) {
1845 test_char:
1846 switch (c) {
1847 case '\n':
1848 /*
1849 * Escaped newline: read characters until a
1850 * non-space or an unescaped newline and
1851 * replace them all by a single space. This is
1852 * done by storing the space over the backslash
1853 * and dropping through with the next nonspace.
1854 * If it is a semi-colon and semiNL is true,
1855 * it will be recognized as a newline in the
1856 * code below this...
1857 */
1858 CURFILE->lineno++;
1859 lastc = ' ';
1860 while ((c = ParseReadc()) == ' ' || c == '\t') {
1861 continue;
1862 }
1863 if (c == EOF || c == '\n') {
1864 goto line_read;
1865 } else {
1866 /*
1867 * Check for comments, semiNL's, etc. --
1868 * easier than ParseUnreadc(c);
1869 * continue;
1870 */
1871 goto test_char;
1872 }
1873 /*NOTREACHED*/
1874 break;
1875
1876 case ';':
1877 /*
1878 * Semi-colon: Need to see if it should be
1879 * interpreted as a newline
1880 */
1881 if (semiNL) {
1882 /*
1883 * To make sure the command that may
1884 * be following this semi-colon begins
1885 * with a tab, we push one back into the
1886 * input stream. This will overwrite the
1887 * semi-colon in the buffer. If there is
1888 * no command following, this does no
1889 * harm, since the newline remains in
1890 * the buffer and the
1891 * whole line is ignored.
1892 */
1893 ParseUnreadc('\t');
1894 goto line_read;
1895 }
1896 break;
1897 case '=':
1898 if (!semiNL) {
1899 /*
1900 * Haven't seen a dependency operator
1901 * before this, so this must be a
1902 * variable assignment -- don't pay
1903 * attention to dependency operators
1904 * after this.
1905 */
1906 ignDepOp = true;
1907 } else if (lastc == ':' || lastc == '!') {
1908 /*
1909 * Well, we've seen a dependency
1910 * operator already, but it was the
1911 * previous character, so this is really
1912 * just an expanded variable assignment.
1913 * Revert semi-colons to being just
1914 * semi-colons again and ignore any more
1915 * dependency operators.
1916 *
1917 * XXX: Note that a line like
1918 * "foo : a:=b" will blow up, but who'd
1919 * write a line like that anyway?
1920 */
1921 ignDepOp = true;
1922 semiNL = false;
1923 }
1924 break;
1925 case '#':
1926 if (!ignComment) {
1927 if (lastc != '\\') {
1928 /*
1929 * If the character is a hash
1930 * mark and it isn't escaped
1931 * (or we're being compatible),
1932 * the thing is a comment.
1933 * Skip to the end of the line.
1934 */
1935 do {
1936 c = ParseReadc();
1937 } while (c != '\n' && c != EOF);
1938 goto line_read;
1939 } else {
1940 /*
1941 * Don't add the backslash.
1942 * Just let the # get copied
1943 * over.
1944 */
1945 lastc = c;
1946 continue;
1947 }
1948 }
1949 break;
1950
1951 case ':':
1952 case '!':
1953 if (!ignDepOp) {
1954 /*
1955 * A semi-colon is recognized as a
1956 * newline only on dependency lines.
1957 * Dependency lines are lines with a
1958 * colon or an exclamation point.
1959 * Ergo...
1960 */
1961 semiNL = true;
1962 }
1963 break;
1964
1965 default:
1966 break;
1967 }
1968 /*
1969 * Copy in the previous character (there may be none if this
1970 * was the first character) and save this one in
1971 * lastc.
1972 */
1973 if (lastc != '\0')
1974 Buf_AddByte(buf, lastc);
1975 lastc = c;
1976 }
1977 line_read:
1978 CURFILE->lineno++;
1979
1980 if (lastc != '\0') {
1981 Buf_AddByte(buf, lastc);
1982 }
1983 Buf_AddByte(buf, '\0');
1984 line = Buf_Peel(buf);
1985
1986 /*
1987 * Strip trailing blanks and tabs from the line.
1988 * Do not strip a blank or tab that is preceded by
1989 * a '\'
1990 */
1991 ep = line;
1992 while (*ep)
1993 ++ep;
1994 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) {
1995 if (ep > line + 1 && ep[-2] == '\\')
1996 break;
1997 --ep;
1998 }
1999 *ep = 0;
2000
2001 if (line[0] == '\0') {
2002 /* empty line - just ignore */
2003 free(line);
2004 goto again;
2005 }
2006
2007 return (line);
2008 }
2009
2010 /*-
2011 *-----------------------------------------------------------------------
2012 * ParseFinishLine --
2013 * Handle the end of a dependency group.
2014 *
2015 * Results:
2016 * Nothing.
2017 *
2018 * Side Effects:
2019 * inLine set false. 'targets' list destroyed.
2020 *
2021 *-----------------------------------------------------------------------
2022 */
2023 static void
2024 ParseFinishLine(void)
2025 {
2026 const LstNode *ln;
2027
2028 if (inLine) {
2029 LST_FOREACH(ln, &targets) {
2030 if (((const GNode *)Lst_Datum(ln))->type & OP_TRANSFORM)
2031 Suff_EndTransform(Lst_Datum(ln));
2032 }
2033 Lst_Destroy(&targets, ParseHasCommands);
2034 inLine = false;
2035 }
2036 }
2037
2038 /**
2039 * parse_include
2040 * Parse an .include directive and push the file onto the input stack.
2041 * The input is the line minus the .include. A file spec is a string
2042 * enclosed in <> or "". The former is looked for only in sysIncPath.
2043 * The latter in . and the directories specified by -I command line
2044 * options
2045 */
2046 static void
2047 parse_include(Parser *parser __unused, char *file, int code __unused, int lineno __unused)
2048 {
2049 char *fullname; /* full pathname of file */
2050 char endc; /* the character which ends the file spec */
2051 char *cp; /* current position in file spec */
2052 bool isSystem; /* true if makefile is a system makefile */
2053 char *prefEnd, *Fname;
2054 char *newName;
2055
2056 /*
2057 * Skip to delimiter character so we know where to look
2058 */
2059 while (*file == ' ' || *file == '\t') {
2060 file++;
2061 }
2062
2063 if (*file != '"' && *file != '<') {
2064 Parse_Error(PARSE_FATAL,
2065 ".include filename must be delimited by '\"' or '<'");
2066 return;
2067 }
2068
2069 /*
2070 * Set the search path on which to find the include file based on the
2071 * characters which bracket its name. Angle-brackets imply it's
2072 * a system Makefile while double-quotes imply it's a user makefile
2073 */
2074 if (*file == '<') {
2075 isSystem = true;
2076 endc = '>';
2077 } else {
2078 isSystem = false;
2079 endc = '"';
2080 }
2081
2082 /*
2083 * Skip to matching delimiter
2084 */
2085 for (cp = ++file; *cp != endc; cp++) {
2086 if (*cp == '\0') {
2087 Parse_Error(PARSE_FATAL,
2088 "Unclosed .include filename. '%c' expected", endc);
2089 return;
2090 }
2091 }
2092 *cp = '\0';
2093
2094 /*
2095 * Substitute for any variables in the file name before trying to
2096 * find the thing.
2097 */
2098 file = Buf_Peel(Var_Subst(file, VAR_CMD, false));
2099
2100 /*
2101 * Now we know the file's name and its search path, we attempt to
2102 * find the durn thing. A return of NULL indicates the file don't
2103 * exist.
2104 */
2105 if (!isSystem) {
2106 /*
2107 * Include files contained in double-quotes are first searched
2108 * for relative to the including file's location. We don't want
2109 * to cd there, of course, so we just tack on the old file's
2110 * leading path components and call Dir_FindFile to see if
2111 * we can locate the beast.
2112 */
2113
2114 /* Make a temporary copy of this, to be safe. */
2115 Fname = estrdup(CURFILE->fname);
2116
2117 prefEnd = strrchr(Fname, '/');
2118 if (prefEnd != NULL) {
2119 *prefEnd = '\0';
2120 if (file[0] == '/')
2121 newName = estrdup(file);
2122 else
2123 newName = str_concat(Fname, '/', file);
2124 fullname = Path_FindFile(newName, parser->parseIncPath);
2125 if (fullname == NULL) {
2126 fullname = Path_FindFile(newName,
2127 &dirSearchPath);
2128 }
2129 free(newName);
2130 *prefEnd = '/';
2131 } else {
2132 fullname = NULL;
2133 }
2134 free(Fname);
2135 } else {
2136 fullname = NULL;
2137 }
2138
2139 if (fullname == NULL) {
2140 /*
2141 * System makefile or makefile wasn't found in same directory as
2142 * included makefile. Search for it first on the -I search path,
2143 * then on the .PATH search path, if not found in a -I
2144 * directory.
2145 * XXX: Suffix specific?
2146 */
2147 fullname = Path_FindFile(file, parser->parseIncPath);
2148 if (fullname == NULL) {
2149 fullname = Path_FindFile(file, &dirSearchPath);
2150 }
2151 }
2152
2153 if (fullname == NULL) {
2154 /*
2155 * Still haven't found the makefile. Look for it on the system
2156 * path as a last resort.
2157 */
2158 fullname = Path_FindFile(file, parser->sysIncPath);
2159 }
2160
2161 if (fullname == NULL) {
2162 *cp = endc;
2163 Parse_Error(PARSE_FATAL, "Could not find %s", file);
2164 free(file);
2165 return;
2166 }
2167 free(file);
2168
2169 /*
2170 * We set up the name of the file to be the absolute
2171 * name of the include file so error messages refer to the right
2172 * place.
2173 */
2174 ParsePushInput(fullname, NULL, NULL, 0);
2175 }
2176
2177 /**
2178 * parse_message
2179 * Parse a .warning or .error directive
2180 *
2181 * The input is the line minus the ".error"/".warning". We substitute
2182 * variables, print the message and exit(1) (for .error) or just print
2183 * a warning if the directive is malformed.
2184 */
2185 static void
2186 parse_message(Parser *parser __unused, char *line, int iserror, int lineno __unused)
2187 {
2188
2189 if (!isspace((u_char)*line)) {
2190 Parse_Error(PARSE_WARNING, "invalid syntax: .%s%s",
2191 iserror ? "error" : "warning", line);
2192 return;
2193 }
2194
2195 while (isspace((u_char)*line))
2196 line++;
2197
2198 line = Buf_Peel(Var_Subst(line, VAR_GLOBAL, false));
2199 Parse_Error(iserror ? PARSE_FATAL : PARSE_WARNING, "%s", line);
2200 free(line);
2201
2202 if (iserror) {
2203 /* Terminate immediately. */
2204 exit(1);
2205 }
2206 }
2207
2208 /**
2209 * parse_undef
2210 * Parse an .undef directive.
2211 */
2212 static void
2213 parse_undef(Parser *parser __unused, char *line, int code __unused, int lineno __unused)
2214 {
2215 char *cp;
2216
2217 while (isspace((u_char)*line))
2218 line++;
2219
2220 for (cp = line; !isspace((u_char)*cp) && *cp != '\0'; cp++) {
2221 ;
2222 }
2223 *cp = '\0';
2224
2225 cp = Buf_Peel(Var_Subst(line, VAR_CMD, false));
2226 Var_Delete(cp, VAR_GLOBAL);
2227 free(cp);
2228 }
2229
2230 /**
2231 * parse_makeenv
2232 * Parse an .makeenv directive.
2233 */
2234 static void
2235 parse_makeenv(Parser *parser __unused, char *line, int code __unused, int lineno __unused)
2236 {
2237 char *cp;
2238
2239 while (isspace((u_char)*line))
2240 line++;
2241
2242 for (cp = line; !isspace((u_char)*cp) && *cp != '\0'; cp++) {
2243 ;
2244 }
2245 *cp = '\0';
2246
2247 cp = Buf_Peel(Var_Subst(line, VAR_CMD, false));
2248 Var_SetEnv(cp, VAR_GLOBAL);
2249 free(cp);
2250 }
2251
2252 /**
2253 * parse_for
2254 * Parse a .for directive.
2255 */
2256 static void
2257 parse_for(Parser *parser __unused, char *line, int code __unused, int lineno)
2258 {
2259
2260 if (!For_For(line)) {
2261 /* syntax error */
2262 return;
2263 }
2264 line = NULL;
2265
2266 /*
2267 * Skip after the matching endfor.
2268 */
2269 do {
2270 free(line);
2271 line = ParseSkipLine(0, 1);
2272 if (line == NULL) {
2273 Parse_Error(PARSE_FATAL,
2274 "Unexpected end of file in for loop.\n");
2275 return;
2276 }
2277 } while (For_Eval(line));
2278 free(line);
2279
2280 /* execute */
2281 For_Run(lineno);
2282 }
2283
2284 /**
2285 * parse_endfor
2286 * Parse endfor. This may only happen if there was no matching .for.
2287 */
2288 static void
2289 parse_endfor(Parser *parser __unused, char *line __unused, int code __unused, int lineno __unused)
2290 {
2291
2292 Parse_Error(PARSE_FATAL, "for-less endfor");
2293 }
2294
2295 /**
2296 * parse_directive
2297 * Got a line starting with a '.'. Check if this is a directive
2298 * and parse it.
2299 *
2300 * return:
2301 * true if line was a directive, false otherwise.
2302 */
2303 static bool
2304 parse_directive(Parser *parser, char *line)
2305 {
2306 char *start;
2307 char *cp;
2308 int dir;
2309
2310 /*
2311 * Get the keyword:
2312 * .[[:space:]]*\([[:alpha:]][[:alnum:]_]*\).*
2313 * \1 is the keyword.
2314 */
2315 for (start = line; isspace((u_char)*start); start++) {
2316 ;
2317 }
2318
2319 if (!isalpha((u_char)*start)) {
2320 return (false);
2321 }
2322
2323 cp = start + 1;
2324 while (isalnum((u_char)*cp) || *cp == '_') {
2325 cp++;
2326 }
2327
2328 dir = directive_hash((const unsigned char *)start, cp - start);
2329 if (dir < 0 || dir >= (int)NDIRECTS ||
2330 (size_t)(cp - start) != strlen(directives[dir].name) ||
2331 strncmp(start, directives[dir].name, cp - start) != 0) {
2332 /* not actually matched */
2333 return (false);
2334 }
2335
2336 if (!skipLine || directives[dir].skip_flag)
2337 (*directives[dir].func)(parser, cp, directives[dir].code,
2338 CURFILE->lineno);
2339 return (true);
2340 }
2341
2342 /**
2343 * Parse a file into its component parts, incorporating it into the
2344 * current dependency graph. This is the main function and controls
2345 * almost every other function in this module
2346 *
2347 * Results:
2348 * None
2349 *
2350 * Side Effects:
2351 * Loads. Nodes are added to the list of all targets, nodes and links
2352 * are added to the dependency graph. etc. etc. etc.
2353 */
2354 void
2355 Parse_File(Parser *parser, struct CLI *cli, const char name[], FILE *stream)
2356 {
2357 char *cp; /* pointer into the line */
2358 char *line; /* the line we're working on */
2359
2360 inLine = false;
2361 fatals = 0;
2362
2363 ParsePushInput(estrdup(name), stream, NULL, 0);
2364
2365 while ((line = ParseReadLine()) != NULL) {
2366 if (*line == '.' && parse_directive(parser, line + 1)) {
2367 /* directive consumed */
2368 goto nextLine;
2369 }
2370 if (skipLine || *line == '#') {
2371 /* Skipping .if block or comment. */
2372 goto nextLine;
2373 }
2374
2375 if (*line == '\t') {
2376 /*
2377 * If a line starts with a tab, it can only
2378 * hope to be a creation command.
2379 */
2380 for (cp = line + 1; isspace((unsigned char)*cp); cp++) {
2381 continue;
2382 }
2383 if (*cp) {
2384 if (inLine) {
2385 LstNode *ln;
2386 GNode *gn;
2387
2388 /*
2389 * So long as it's not a blank
2390 * line and we're actually in a
2391 * dependency spec, add the
2392 * command to the list of
2393 * commands of all targets in
2394 * the dependency spec.
2395 */
2396 LST_FOREACH(ln, &targets) {
2397 gn = Lst_Datum(ln);
2398
2399 /*
2400 * if target already
2401 * supplied, ignore
2402 * commands
2403 */
2404 if (!(gn->type & OP_HAS_COMMANDS))
2405 Lst_AtEnd(&gn->commands, cp);
2406 else
2407 Parse_Error(PARSE_WARNING, "duplicate script "
2408 "for target \"%s\" ignored", gn->name);
2409 }
2410 continue;
2411 } else {
2412 Parse_Error(PARSE_FATAL,
2413 "Unassociated shell command \"%s\"",
2414 cp);
2415 }
2416 }
2417 #ifdef SYSVINCLUDE
2418 } else if (strncmp(line, "include", 7) == 0 &&
2419 isspace((unsigned char)line[7]) &&
2420 strchr(line, ':') == NULL) {
2421 /*
2422 * It's an S3/S5-style "include".
2423 */
2424 ParseTraditionalInclude(parser, line + 7);
2425 goto nextLine;
2426 #endif
2427 } else if (Parse_IsVar(line)) {
2428 ParseFinishLine();
2429 Parse_DoVar(line, VAR_GLOBAL);
2430
2431 } else {
2432 /*
2433 * We now know it's a dependency line so it
2434 * needs to have all variables expanded before
2435 * being parsed. Tell the variable module to
2436 * complain if some variable is undefined...
2437 * To make life easier on novices, if the line
2438 * is indented we first make sure the line has
2439 * a dependency operator in it. If it doesn't
2440 * have an operator and we're in a dependency
2441 * line's script, we assume it's actually a
2442 * shell command and add it to the current
2443 * list of targets. XXX this comment seems wrong.
2444 */
2445 cp = line;
2446 if (isspace((unsigned char)line[0])) {
2447 while (*cp != '\0' &&
2448 isspace((unsigned char)*cp)) {
2449 cp++;
2450 }
2451 if (*cp == '\0') {
2452 goto nextLine;
2453 }
2454 }
2455
2456 ParseFinishLine();
2457
2458 cp = Buf_Peel(Var_Subst(line, VAR_CMD, true));
2459
2460 free(line);
2461 line = cp;
2462
2463 /*
2464 * Need a non-circular list for the target nodes
2465 */
2466 Lst_Destroy(&targets, NOFREE);
2467 inLine = true;
2468
2469 ParseDoDependency(parser, cli, line);
2470 }
2471
2472 nextLine:
2473 free(line);
2474 }
2475
2476 ParseFinishLine();
2477
2478 /*
2479 * Make sure conditionals are clean
2480 */
2481 Cond_End(parser, NULL, 0, 0);
2482
2483 if (fatals)
2484 errx(1, "fatal errors encountered -- cannot continue");
2485 }
2486
2487 /*-
2488 *-----------------------------------------------------------------------
2489 * Parse_MainName --
2490 * Return a Lst of the main target to create for main()'s sake. If
2491 * no such target exists, we Punt with an obnoxious error message.
2492 *
2493 * Results:
2494 * A Lst of the single node to create.
2495 *
2496 * Side Effects:
2497 * None.
2498 *
2499 *-----------------------------------------------------------------------
2500 */
2501 void
2502 Parse_MainName(Lst *listmain)
2503 {
2504
2505 if (mainNode == NULL) {
2506 Punt("no target to make.");
2507 /*NOTREACHED*/
2508 } else if (mainNode->type & OP_DOUBLEDEP) {
2509 Lst_AtEnd(listmain, mainNode);
2510 Lst_Concat(listmain, &mainNode->cohorts, LST_CONCNEW);
2511 } else
2512 Lst_AtEnd(listmain, mainNode);
2513 }
DragonFly BSD