diff options
Diffstat (limited to 'setup.c')
-rw-r--r-- | setup.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/setup.c b/setup.c new file mode 100644 index 0000000000..453bddbb17 --- /dev/null +++ b/setup.c @@ -0,0 +1,110 @@ +#include "cache.h" + +const char **get_pathspec(const char *prefix, char **pathspec) +{ + char *entry = *pathspec; + char **p; + int prefixlen; + + if (!prefix) { + char **p; + if (!entry) + return NULL; + p = pathspec; + do { + if (*entry != '.') + continue; + /* fixup ? */ + } while ((entry = *++p) != NULL); + return (const char **) pathspec; + } + + if (!entry) { + static const char *spec[2]; + spec[0] = prefix; + spec[1] = NULL; + return spec; + } + + /* Otherwise we have to re-write the entries.. */ + prefixlen = strlen(prefix); + p = pathspec; + do { + int speclen, len = prefixlen; + char *n; + + for (;;) { + if (!strcmp(entry, ".")) { + entry++; + break; + } + if (!strncmp(entry, "./", 2)) { + entry += 2; + continue; + } + if (!strncmp(entry, "../", 3)) { + do { + if (!len) + die("'%s' is outside repository", *p); + len--; + } while (len && prefix[len-1] != '/'); + entry += 3; + continue; + } + break; + } + speclen = strlen(entry); + n = xmalloc(speclen + len + 1); + + memcpy(n, prefix, len); + memcpy(n + len, entry, speclen+1); + *p = n; + } while ((entry = *++p) != NULL); + return (const char **) pathspec; +} + +const char *setup_git_directory(void) +{ + static char cwd[PATH_MAX+1]; + int len, offset; + + /* + * If GIT_DIR is set explicitly, we're not going + * to do any discovery + */ + if (gitenv(GIT_DIR_ENVIRONMENT)) + return NULL; + + if (!getcwd(cwd, sizeof(cwd)) || cwd[0] != '/') + die("Unable to read current working directory"); + + offset = len = strlen(cwd); + for (;;) { + /* + * We always want to see a .git/HEAD and a .git/refs/ + * subdirectory + */ + if (!access(".git/HEAD", R_OK) && !access(".git/refs/", X_OK)) { + /* + * Then we need either a GIT_OBJECT_DIRECTORY define + * or a .git/objects/ directory + */ + if (gitenv(DB_ENVIRONMENT) || !access(".git/objects/", X_OK)) + break; + } + chdir(".."); + do { + if (!offset) + die("Not a git repository"); + } while (cwd[--offset] != '/'); + } + + if (offset == len) + return NULL; + + /* Make "offset" point to past the '/', and add a '/' at the end */ + offset++; + cwd[len++] = '/'; + cwd[len] = 0; + return cwd + offset; +} |