stash: teach 'push' (and 'create_stash') to honor pathspec
[git.git] / userdiff.c
blob2125d6da26dbdc01f7397415ef1f67616e6f2a71
1 #include "cache.h"
2 #include "userdiff.h"
3 #include "attr.h"
5 static struct userdiff_driver *drivers;
6 static int ndrivers;
7 static int drivers_alloc;
9 #define PATTERNS(name, pattern, word_regex) \
10 { name, NULL, -1, { pattern, REG_EXTENDED }, \
11 word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
12 #define IPATTERN(name, pattern, word_regex) \
13 { name, NULL, -1, { pattern, REG_EXTENDED | REG_ICASE }, \
14 word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
15 static struct userdiff_driver builtin_drivers[] = {
16 IPATTERN("ada",
17 "!^(.*[ \t])?(is[ \t]+new|renames|is[ \t]+separate)([ \t].*)?$\n"
18 "!^[ \t]*with[ \t].*$\n"
19 "^[ \t]*((procedure|function)[ \t]+.*)$\n"
20 "^[ \t]*((package|protected|task)[ \t]+.*)$",
21 /* -- */
22 "[a-zA-Z][a-zA-Z0-9_]*"
23 "|[-+]?[0-9][0-9#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
24 "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
25 IPATTERN("fortran",
26 "!^([C*]|[ \t]*!)\n"
27 "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
28 "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA"
29 "|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$",
30 /* -- */
31 "[a-zA-Z][a-zA-Z0-9_]*"
32 "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
33 /* numbers and format statements like 2E14.4, or ES12.6, 9X.
34 * Don't worry about format statements without leading digits since
35 * they would have been matched above as a variable anyway. */
36 "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
37 "|//|\\*\\*|::|[/<>=]="),
38 IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
39 "[^ \t-]+"),
40 PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
41 "[^<>= \t]+"),
42 PATTERNS("java",
43 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
44 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
45 /* -- */
46 "[a-zA-Z_][a-zA-Z0-9_]*"
47 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
48 "|[-+*/<>%&^|=!]="
49 "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
50 PATTERNS("matlab",
51 "^[[:space:]]*((classdef|function)[[:space:]].*)$|^%%[[:space:]].*$",
52 "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
53 PATTERNS("objc",
54 /* Negate C statements that can look like functions */
55 "!^[ \t]*(do|for|if|else|return|switch|while)\n"
56 /* Objective-C methods */
57 "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
58 /* C functions */
59 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
60 /* Objective-C class/protocol definitions */
61 "^(@(implementation|interface|protocol)[ \t].*)$",
62 /* -- */
63 "[a-zA-Z_][a-zA-Z0-9_]*"
64 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
65 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
66 PATTERNS("pascal",
67 "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|"
68 "implementation|initialization|finalization)[ \t]*.*)$"
69 "\n"
70 "^(.*=[ \t]*(class|record).*)$",
71 /* -- */
72 "[a-zA-Z_][a-zA-Z0-9_]*"
73 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
74 "|<>|<=|>=|:=|\\.\\."),
75 PATTERNS("perl",
76 "^package .*\n"
77 "^sub [[:alnum:]_':]+[ \t]*"
78 "(\\([^)]*\\)[ \t]*)?" /* prototype */
80 * Attributes. A regex can't count nested parentheses,
81 * so just slurp up whatever we see, taking care not
82 * to accept lines like "sub foo; # defined elsewhere".
84 * An attribute could contain a semicolon, but at that
85 * point it seems reasonable enough to give up.
87 "(:[^;#]*)?"
88 "(\\{[ \t]*)?" /* brace can come here or on the next line */
89 "(#.*)?$\n" /* comment */
90 "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
91 "(\\{[ \t]*)?" /* brace can come here or on the next line */
92 "(#.*)?$\n"
93 "^=head[0-9] .*", /* POD */
94 /* -- */
95 "[[:alpha:]_'][[:alnum:]_']*"
96 "|0[xb]?[0-9a-fA-F_]*"
97 /* taking care not to interpret 3..5 as (3.)(.5) */
98 "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
99 "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
100 "|&&=|\\|\\|=|//=|\\*\\*="
101 "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
102 "|[-+*/%.^&<>=!|]="
103 "|=~|!~"
104 "|<<|<>|<=>|>>"),
105 PATTERNS("php",
106 "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
107 "^[\t ]*(class.*)$",
108 /* -- */
109 "[a-zA-Z_][a-zA-Z0-9_]*"
110 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
111 "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
112 PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
113 /* -- */
114 "[a-zA-Z_][a-zA-Z0-9_]*"
115 "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
116 "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
117 /* -- */
118 PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
119 /* -- */
120 "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
121 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
122 "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
123 PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
124 "[={}\"]|[^={}\" \t]+"),
125 PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
126 "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
127 PATTERNS("cpp",
128 /* Jump targets or access declarations */
129 "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
130 /* functions/methods, variables, and compounds at top level */
131 "^((::[[:space:]]*)?[A-Za-z_].*)$",
132 /* -- */
133 "[a-zA-Z_][a-zA-Z0-9_]*"
134 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
135 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
136 PATTERNS("csharp",
137 /* Keywords */
138 "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
139 /* Methods and constructors */
140 "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
141 /* Properties */
142 "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
143 /* Type definitions */
144 "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
145 /* Namespace */
146 "^[ \t]*(namespace[ \t]+.*)$",
147 /* -- */
148 "[a-zA-Z_][a-zA-Z0-9_]*"
149 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
150 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
151 IPATTERN("css",
152 "![:;][[:space:]]*$\n"
153 "^[_a-z0-9].*$",
154 /* -- */
156 * This regex comes from W3C CSS specs. Should theoretically also
157 * allow ISO 10646 characters U+00A0 and higher,
158 * but they are not handled in this regex.
160 "-?[_a-zA-Z][-_a-zA-Z0-9]*" /* identifiers */
161 "|-?[0-9]+|\\#[0-9a-fA-F]+" /* numbers */
163 { "default", NULL, -1, { NULL, 0 } },
165 #undef PATTERNS
166 #undef IPATTERN
168 static struct userdiff_driver driver_true = {
169 "diff=true",
170 NULL,
172 { NULL, 0 }
175 static struct userdiff_driver driver_false = {
176 "!diff",
177 NULL,
179 { NULL, 0 }
182 static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
184 int i;
185 for (i = 0; i < ndrivers; i++) {
186 struct userdiff_driver *drv = drivers + i;
187 if (!strncmp(drv->name, k, len) && !drv->name[len])
188 return drv;
190 for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
191 struct userdiff_driver *drv = builtin_drivers + i;
192 if (!strncmp(drv->name, k, len) && !drv->name[len])
193 return drv;
195 return NULL;
198 static int parse_funcname(struct userdiff_funcname *f, const char *k,
199 const char *v, int cflags)
201 if (git_config_string(&f->pattern, k, v) < 0)
202 return -1;
203 f->cflags = cflags;
204 return 0;
207 static int parse_tristate(int *b, const char *k, const char *v)
209 if (v && !strcasecmp(v, "auto"))
210 *b = -1;
211 else
212 *b = git_config_bool(k, v);
213 return 0;
216 static int parse_bool(int *b, const char *k, const char *v)
218 *b = git_config_bool(k, v);
219 return 0;
222 int userdiff_config(const char *k, const char *v)
224 struct userdiff_driver *drv;
225 const char *name, *type;
226 int namelen;
228 if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
229 return 0;
231 drv = userdiff_find_by_namelen(name, namelen);
232 if (!drv) {
233 ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
234 drv = &drivers[ndrivers++];
235 memset(drv, 0, sizeof(*drv));
236 drv->name = xmemdupz(name, namelen);
237 drv->binary = -1;
240 if (!strcmp(type, "funcname"))
241 return parse_funcname(&drv->funcname, k, v, 0);
242 if (!strcmp(type, "xfuncname"))
243 return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
244 if (!strcmp(type, "binary"))
245 return parse_tristate(&drv->binary, k, v);
246 if (!strcmp(type, "command"))
247 return git_config_string(&drv->external, k, v);
248 if (!strcmp(type, "textconv"))
249 return git_config_string(&drv->textconv, k, v);
250 if (!strcmp(type, "cachetextconv"))
251 return parse_bool(&drv->textconv_want_cache, k, v);
252 if (!strcmp(type, "wordregex"))
253 return git_config_string(&drv->word_regex, k, v);
255 return 0;
258 struct userdiff_driver *userdiff_find_by_name(const char *name) {
259 int len = strlen(name);
260 return userdiff_find_by_namelen(name, len);
263 struct userdiff_driver *userdiff_find_by_path(const char *path)
265 static struct git_attr *attr;
266 struct git_attr_check check;
268 if (!attr)
269 attr = git_attr("diff");
270 check.attr = attr;
272 if (!path)
273 return NULL;
274 if (git_check_attr(path, 1, &check))
275 return NULL;
277 if (ATTR_TRUE(check.value))
278 return &driver_true;
279 if (ATTR_FALSE(check.value))
280 return &driver_false;
281 if (ATTR_UNSET(check.value))
282 return NULL;
283 return userdiff_find_by_name(check.value);
286 struct userdiff_driver *userdiff_get_textconv(struct userdiff_driver *driver)
288 if (!driver->textconv)
289 return NULL;
291 if (driver->textconv_want_cache && !driver->textconv_cache) {
292 struct notes_cache *c = xmalloc(sizeof(*c));
293 struct strbuf name = STRBUF_INIT;
295 strbuf_addf(&name, "textconv/%s", driver->name);
296 notes_cache_init(c, name.buf, driver->textconv);
297 driver->textconv_cache = c;
300 return driver;