diff options
Diffstat (limited to 'exec_cmd.c')
| -rw-r--r-- | exec_cmd.c | 44 |
1 files changed, 44 insertions, 0 deletions
@@ -9,12 +9,56 @@ static const char *argv0_path; const char *system_path(const char *path) { +#ifdef RUNTIME_PREFIX + static const char *prefix; +#else static const char *prefix = PREFIX; +#endif struct strbuf d = STRBUF_INIT; if (is_absolute_path(path)) return path; +#ifdef RUNTIME_PREFIX + assert(argv0_path); + assert(is_absolute_path(argv0_path)); + + if (!prefix) { + const char *strip[] = { + GIT_EXEC_PATH, + BINDIR, + 0 + }; + const char **s; + + for (s = strip; *s; s++) { + const char *sargv = argv0_path + strlen(argv0_path); + const char *ss = *s + strlen(*s); + while (argv0_path < sargv && *s < ss + && (*sargv == *ss || + (is_dir_sep(*sargv) && is_dir_sep(*ss)))) { + sargv--; + ss--; + } + if (*s == ss) { + struct strbuf d = STRBUF_INIT; + /* We also skip the trailing directory separator. */ + assert(sargv - argv0_path - 1 >= 0); + strbuf_add(&d, argv0_path, sargv - argv0_path - 1); + prefix = strbuf_detach(&d, NULL); + break; + } + } + } + + if (!prefix) { + prefix = PREFIX; + fprintf(stderr, "RUNTIME_PREFIX requested, " + "but prefix computation failed. " + "Using static fallback '%s'.\n", prefix); + } +#endif + strbuf_addf(&d, "%s/%s", prefix, path); path = strbuf_detach(&d, NULL); return path; |