lily/relocate.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "relocate.hh"
  21
  22 #include "config.hh"
  23
  24
  25 /* TODO: autoconf support */
  26
  27 #include <sys/types.h>
  28 #include <dirent.h>
  29
  30 #if HAVE_GETTEXT
  31 #include <libintl.h>
  32 #endif
  33
  34 #include "file-name.hh"
  35 #include "file-path.hh"
  36 #include "international.hh"
  37 #include "lily-guile.hh"
  38 #include "lily-version.hh"
  39 #include "main.hh"
  40 #include "version.hh"
  41 #include "warn.hh"
  42
  43 #define FRAMEWORKDIR ".."
  44
  45 int
  46 sane_putenv (char const *key, string value, bool overwrite)
  47 {
  48   if (overwrite || !getenv (key))
  49     {
  50       string combine = string (key) + "=" + value;
  51       char *s = strdup (combine.c_str ());
  52
  53       if (be_verbose_global)
  54         progress_indication (_f ("Setting %s to %s" , key, value.c_str ())
  55                              + "\n");
  56
  57       int retval =  putenv (s);
  58       /*
  59         unfortunately, we can't portably free S here,
  60         due to various bugs in glibc prior to 2.1.1
  61       */
  62       return retval;
  63     }
  64
  65   return -1;
  66 }
  67
  68 static int
  69 set_env_file (char const *key, string value, bool overwrite = false)
  70 {
  71   if (is_file (value))
  72     return sane_putenv (key, value, overwrite);
  73   else if (be_verbose_global)
  74     warning (_f ("no such file: %s for %s", value, key));
  75   return -1;
  76 }
  77
  78 static int
  79 set_env_dir (char const *key, string value)
  80 {
  81   if (is_dir (value))
  82     return sane_putenv (key, value, false);
  83   else if (be_verbose_global)
  84     warning (_f ("no such directory: %s for %s", value, key));
  85   return -1;
  86 }
  87
  88 static int
  89 prepend_env_path (char const *key, string value)
  90 {
  91   if (is_dir (value))
  92     {
  93       if (be_verbose_global)
  94         progress_indication (_f ("%s=%s (prepend)\n", key, value.c_str ()));
  95
  96       if (char const *cur = getenv (key))
  97         value += to_string (PATHSEP) + cur;
  98
  99       return sane_putenv (key, value.c_str (), true);
 100     }
 101   else if (be_verbose_global)
 102     warning (_f ("no such directory: %s for %s", value, key));
 103   return -1;
 104 }
 105
 106 #ifdef __MINGW32__
 107 #include <winbase.h>
 108 #endif
 109
 110 static void
 111 prefix_relocation (string prefix)
 112 {
 113   string bindir = prefix + "/bin";
 114   string datadir = prefix + "/share";
 115   string localedir = datadir + "/locale";
 116   string package_datadir = datadir + "/lilypond/";
 117   string old_lilypond_datadir = lilypond_datadir;
 118
 119   if (is_dir (package_datadir + "/" + TOPLEVEL_VERSION))
 120     lilypond_datadir = package_datadir + "/" + TOPLEVEL_VERSION;
 121   else if (is_dir (package_datadir + "/current"))
 122     lilypond_datadir = package_datadir + "/current";
 123   else
 124     warning (_f ("not relocating, no %s/ or current/ found under %s",
 125                  TOPLEVEL_VERSION, package_datadir.c_str ()));
 126
 127 #if HAVE_GETTEXT
 128   if (is_dir (localedir))
 129     bindtextdomain ("lilypond", localedir.c_str ());
 130 #endif
 131
 132   prepend_env_path ("PATH", bindir);
 133
 134   if (be_verbose_global)
 135     warning (_f ("Relocation: compile datadir=%s, new datadir=%s",
 136                  old_lilypond_datadir.c_str (),
 137                  lilypond_datadir.c_str ()));
 138 }
 139
 140 /*
 141   UGH : this is a complete mess.
 142 */
 143
 144 static void
 145 framework_relocation (string prefix)
 146 {
 147   if (be_verbose_global)
 148     warning (_f ("Relocation: framework_prefix=%s", prefix));
 149
 150   sane_putenv ("INSTALLER_PREFIX", prefix, true);
 151
 152   read_relocation_dir (prefix + "/etc/relocate/");
 153
 154   string bindir = prefix + "/bin";
 155
 156   prepend_env_path ("PATH", bindir);
 157 }
 158
 159 /*
 160   UGH : this is a complete mess.
 161 */
 162 void
 163 setup_paths (char const *argv0_ptr)
 164 {
 165   File_name argv0_filename (argv0_ptr);
 166
 167   if (relocate_binary)
 168     {
 169       string prefix_directory;
 170       if (getenv ("LILYPOND_RELOCATE_PREFIX"))
 171         {
 172           prefix_directory = getenv ("LILYPOND_RELOCATE_PREFIX");
 173 #ifdef __MINGW32__
 174           /* Normalize file name.  */
 175           prefix_directory = File_name (prefix_directory).to_string ();
 176 #endif /* __MINGW32__ */
 177
 178           prefix_relocation (prefix_directory);
 179           string bindir = prefix_directory + "/bin";
 180           framework_relocation (bindir);
 181         }
 182       else if (relocate_binary)
 183         {
 184           string argv0_abs;
 185           if (argv0_filename.is_absolute ())
 186             {
 187               argv0_abs = argv0_filename.to_string ();
 188               if (be_verbose_global)
 189                 warning (_f ("Relocation: is absolute: argv0=%s", argv0_ptr));
 190             }
 191           else if (argv0_filename.dir_.length ())
 192             {
 193               argv0_abs = get_working_directory ()
 194                 + "/" + string (argv0_filename.to_string ());
 195               if (be_verbose_global)
 196                 warning (_f ("Relocation: from cwd: argv0=%s", argv0_ptr));
 197             }
 198           else
 199             {
 200               /* Find absolute ARGV0 name, using PATH.  */
 201               File_path path;
 202               path.parse_path (getenv ("PATH"));
 203
 204               if (be_verbose_global)
 205                 warning (_f ("Relocation: from PATH=%s\nargv0=%s",
 206                              path.to_string ().c_str (), argv0_ptr));
 207
 208 #ifndef __MINGW32__
 209               argv0_abs = path.find (argv0_filename.to_string ());
 210 #else /* __MINGW32__ */
 211               char const *ext[] = {"exe", "", 0 };
 212               argv0_abs = path.find (argv0_filename.to_string (), ext);
 213 #endif /* __MINGW32__ */
 214
 215               if (argv0_abs.empty ())
 216                 programming_error ("cannot find absolute argv0");
 217             }
 218
 219           string bindir = dir_name (argv0_abs);
 220           string argv0_prefix = dir_name (bindir);
 221           string compile_prefix = dir_name (dir_name (dir_name (lilypond_datadir)));
 222           if (argv0_prefix != compile_prefix)
 223             {
 224               prefix_relocation (argv0_prefix);
 225               prefix_directory = argv0_prefix;
 226             }
 227           if (argv0_prefix != compile_prefix || string (FRAMEWORKDIR) != "..")
 228             {
 229               framework_relocation (bindir + "/" + FRAMEWORKDIR);
 230               prefix_directory = bindir + "/" + FRAMEWORKDIR;
 231             }
 232         }
 233
 234       lilypond_datadir = prefix_directory
 235         + "/share/lilypond/" TOPLEVEL_VERSION;
 236     }
 237
 238   if (getenv ("LILYPONDPREFIX"))
 239     error (_ ("LILYPONDPREFIX is obsolete, use LILYPOND_DATADIR"));
 240
 241   if (char const *env = getenv ("LILYPOND_DATADIR"))
 242     {
 243       /* Normalize file name.  */
 244       lilypond_datadir = File_name (env).to_string ();
 245     }
 246
 247   /* When running from build dir, a full LILYPOND_DATADIR is set-up at
 248      $(OUTBASE)/{share, lib}/lilypond/current.  Configure lily using
 249      ./configure --prefix=$(pwd)/out */
 250   string build_datadir_current = dir_name (lilypond_datadir) + "/current";
 251   if (!is_dir (lilypond_datadir.c_str ())
 252       && is_dir (build_datadir_current.c_str ()))
 253     lilypond_datadir = build_datadir_current;
 254
 255
 256   lilypond_datadir = File_name (lilypond_datadir).canonicalized().to_string();
 257
 258   global_path.append ("");
 259
 260   /* Adding mf/out make lilypond unchanged source directory, when setting
 261      LILYPONDPREFIX to lilypond-x.y.z */
 262   char const *suffixes[] = {"ly", "ps", "scm", 0 };
 263
 264   vector<string> dirs;
 265   for (char const **s = suffixes; *s; s++)
 266     {
 267       string path = lilypond_datadir + to_string ('/') + string (*s);
 268       dirs.push_back (path);
 269     }
 270
 271   dirs.push_back (lilypond_datadir + "/fonts/otf/");
 272   dirs.push_back (lilypond_datadir + "/fonts/type1/");
 273   dirs.push_back (lilypond_datadir + "/fonts/svg/");
 274
 275   for (vsize i = 0; i < dirs.size (); i++)
 276     global_path.prepend (dirs[i]);
 277 }
 278
 279 string
 280 expand_environment_variables (string orig)
 281 {
 282   char const *start_ptr = orig.c_str ();
 283   char const *ptr = orig.c_str ();
 284   size_t len = orig.length ();
 285
 286   string out;
 287   while (ptr < start_ptr + len)
 288     {
 289       char const *dollar = strchr (ptr, '$');
 290
 291       if (dollar != NULL)
 292         {
 293           char const *start_var = dollar + 1;
 294           char const *end_var = start_var;
 295           char const *start_next = end_var;
 296
 297           out += string (ptr, dollar - ptr);
 298           ptr = dollar;
 299
 300           if (*start_var == '{')
 301             {
 302               start_var ++;
 303
 304               end_var = strchr (start_var, '}');
 305
 306               if (end_var == NULL)
 307                 {
 308                   end_var = start_var + len;
 309                   start_next = end_var;
 310                 }
 311               else
 312                 {
 313                   start_next = end_var + 1;
 314                 }
 315             }
 316           else
 317             {
 318               /*
 319                 Hmm. what to do for $1 , $~ etc.?
 320               */
 321               do
 322                 {
 323                   end_var ++;
 324                 }
 325               while (isalnum (*end_var) || *end_var == '_');
 326               start_next = end_var;
 327             }
 328
 329           if (start_var < end_var)
 330             {
 331               string var_name (start_var, end_var - start_var);
 332               char const *value = getenv (var_name.c_str ());
 333               if (value != NULL)
 334                 out += string (value);
 335
 336               ptr = start_next;
 337             }
 338         }
 339       else
 340         break;
 341
 342     }
 343
 344   out += ptr;
 345
 346   return out;
 347 }
 348
 349 // Ugh - very inefficient, but safer than fgets.
 350 static string
 351 read_line (FILE *f)
 352 {
 353   string out;
 354
 355   int c = 0;
 356   while ((c = fgetc (f)) != EOF && c != '\n')
 357     out += char(c);
 358
 359   return out;
 360 }
 361
 362 void
 363 read_relocation_file (string filename)
 364 {
 365   if (be_verbose_global)
 366     progress_indication (_f ("Relocation file: %s", filename.c_str ())
 367                          + "\n");
 368
 369   char const *cname = filename.c_str ();
 370   FILE *f = fopen (cname, "r");
 371   if (!f)
 372     error (_f ("cannot open file: `%s'", cname));
 373
 374   while (!feof (f))
 375     {
 376       string line = read_line (f);
 377       size_t idx = line.find (' ');
 378       if (idx == NPOS)
 379         continue;
 380
 381       string command = line.substr (0, idx);
 382       line = line.substr (idx + 1);
 383
 384       if (idx == NPOS)
 385         continue;
 386       idx = line.find ('=');
 387
 388       string variable = line.substr (0, idx);
 389       string value = line.substr (idx + 1);
 390
 391       value = expand_environment_variables (value);
 392
 393       if (command == "set")
 394         sane_putenv (variable.c_str (), value, true);
 395       else if (command == "setdir")
 396         set_env_dir (variable.c_str (), value);
 397       else if (command == "setfile")
 398         set_env_file (variable.c_str (), value);
 399       else if (command == "prependdir")
 400         prepend_env_path (variable.c_str (), value);
 401       else
 402         error (_f ("Unknown relocation command %s", command));
 403     }
 404
 405   fclose (f);
 406 }
 407
 408 void
 409 read_relocation_dir (string dirname)
 410 {
 411   if (DIR *dir = opendir (dirname.c_str ()))
 412     while (struct dirent *ent = readdir (dir))
 413       {
 414         File_name name (ent->d_name);
 415         if (name.ext_ == "reloc")
 416           read_relocation_file (dirname + "/" + name.to_string ());
 417       }
 418 }