From: Junio C Hamano Date: Mon, 10 Oct 2011 22:56:17 +0000 (-0700) Subject: Merge branch 'cb/common-prefix-unification' X-Git-Tag: v1.7.8-rc0~112 X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/ca3ef81ad78dcbaecd2bf03e22a5bb9d1fa5eff4?ds=sidebyside;hp=-c Merge branch 'cb/common-prefix-unification' * cb/common-prefix-unification: rename pathspec_prefix() to common_prefix() and move to dir.[ch] consolidate pathspec_prefix and common_prefix remove prefix argument from pathspec_prefix --- ca3ef81ad78dcbaecd2bf03e22a5bb9d1fa5eff4 diff --combined builtin/commit.c index cbc9613ec6,1e8e0acb53..b9ab5ef314 --- a/builtin/commit.c +++ b/builtin/commit.c @@@ -62,6 -62,8 +62,6 @@@ N_("The previous cherry-pick is now emp "\n" "Otherwise, please use 'git reset'\n"); -static unsigned char head_sha1[20]; - static const char *use_message_buffer; static const char commit_editmsg[] = "COMMIT_EDITMSG"; static struct lock_file index_lock; /* real index */ @@@ -100,7 -102,7 +100,7 @@@ static enum static char *cleanup_arg; static enum commit_whence whence; -static int use_editor = 1, initial_commit, include_status = 1; +static int use_editor = 1, include_status = 1; static int show_ignored_in_status; static const char *only_include_assumed; static struct strbuf message; @@@ -255,8 -257,9 +255,9 @@@ static int list_paths(struct string_lis m = xcalloc(1, i); if (with_tree) { - const char *max_prefix = pathspec_prefix(prefix, pattern); - overlay_tree_on_cache(with_tree, max_prefix); + char *max_prefix = common_prefix(pattern); + overlay_tree_on_cache(with_tree, max_prefix ? max_prefix : prefix); + free(max_prefix); } for (i = 0; i < active_nr; i++) { @@@ -272,7 -275,7 +273,7 @@@ item->util = item; /* better a valid pointer than a fake one */ } - return report_path_error(m, pattern, prefix ? strlen(prefix) : 0); + return report_path_error(m, pattern, prefix); } static void add_remove_files(struct string_list *list) @@@ -294,13 -297,13 +295,13 @@@ } } -static void create_base_index(void) +static void create_base_index(const struct commit *current_head) { struct tree *tree; struct unpack_trees_options opts; struct tree_desc t; - if (initial_commit) { + if (!current_head) { discard_cache(); return; } @@@ -313,7 -316,7 +314,7 @@@ opts.dst_index = &the_index; opts.fn = oneway_merge; - tree = parse_tree_indirect(head_sha1); + tree = parse_tree_indirect(current_head->object.sha1); if (!tree) die(_("failed to unpack HEAD tree object")); parse_tree(tree); @@@ -332,8 -335,7 +333,8 @@@ static void refresh_cache_or_die(int re die_resolve_conflict("commit"); } -static char *prepare_index(int argc, const char **argv, const char *prefix, int is_status) +static char *prepare_index(int argc, const char **argv, const char *prefix, + const struct commit *current_head, int is_status) { int fd; struct string_list partial; @@@ -449,7 -451,7 +450,7 @@@ memset(&partial, 0, sizeof(partial)); partial.strdup_strings = 1; - if (list_paths(&partial, initial_commit ? NULL : "HEAD", prefix, pathspec)) + if (list_paths(&partial, !current_head ? NULL : "HEAD", prefix, pathspec)) exit(1); discard_cache(); @@@ -468,7 -470,7 +469,7 @@@ (uintmax_t) getpid()), LOCK_DIE_ON_ERROR); - create_base_index(); + create_base_index(current_head); add_remove_files(&partial); refresh_cache(REFRESH_QUIET); @@@ -517,9 -519,12 +518,9 @@@ static int run_status(FILE *fp, const c return s->commitable; } -static int is_a_merge(const unsigned char *sha1) +static int is_a_merge(const struct commit *current_head) { - struct commit *commit = lookup_commit(sha1); - if (!commit || parse_commit(commit)) - die(_("could not parse HEAD commit")); - return !!(commit->parents && commit->parents->next); + return !!(current_head->parents && current_head->parents->next); } static const char sign_off_header[] = "Signed-off-by: "; @@@ -623,7 -628,6 +624,7 @@@ static char *cut_ident_timestamp_part(c } static int prepare_to_commit(const char *index_file, const char *prefix, + struct commit *current_head, struct wt_status *s, struct strbuf *author_ident) { @@@ -845,7 -849,7 +846,7 @@@ * empty due to conflict resolution, which the user should okay. */ if (!commitable && whence != FROM_MERGE && !allow_empty && - !(amend && is_a_merge(head_sha1))) { + !(amend && is_a_merge(current_head))) { run_status(stdout, index_file, prefix, 0, s); if (amend) fputs(_(empty_amend_advice), stderr); @@@ -1003,7 -1007,6 +1004,7 @@@ static const char *read_commit_message( static int parse_and_validate_options(int argc, const char *argv[], const char * const usage[], const char *prefix, + struct commit *current_head, struct wt_status *s) { int f = 0; @@@ -1024,8 -1027,11 +1025,8 @@@ if (!use_editor) setenv("GIT_EDITOR", ":", 1); - if (get_sha1("HEAD", head_sha1)) - initial_commit = 1; - /* Sanity check options */ - if (amend && initial_commit) + if (amend && !current_head) die(_("You have nothing to amend.")); if (amend && whence != FROM_COMMIT) die(_("You are in the middle of a %s -- cannot amend."), whence_s()); @@@ -1097,12 -1103,12 +1098,12 @@@ } static int dry_run_commit(int argc, const char **argv, const char *prefix, - struct wt_status *s) + const struct commit *current_head, struct wt_status *s) { int commitable; const char *index_file; - index_file = prepare_index(argc, argv, prefix, 1); + index_file = prepare_index(argc, argv, prefix, current_head, 1); commitable = run_status(stdout, index_file, prefix, 0, s); rollback_index_files(); @@@ -1141,7 -1147,7 +1142,7 @@@ static int git_status_config(const cha return 0; } if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) { - s->use_color = git_config_colorbool(k, v, -1); + s->use_color = git_config_colorbool(k, v); return 0; } if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) { @@@ -1234,6 -1240,10 +1235,6 @@@ int cmd_status(int argc, const char **a if (s.relative_paths) s.prefix = prefix; - if (s.use_color == -1) - s.use_color = git_use_color_default; - if (diff_use_color_default == -1) - diff_use_color_default = git_use_color_default; switch (status_format) { case STATUS_FORMAT_SHORT: @@@ -1251,8 -1261,7 +1252,8 @@@ return 0; } -static void print_summary(const char *prefix, const unsigned char *sha1) +static void print_summary(const char *prefix, const unsigned char *sha1, + int initial_commit) { struct rev_info rev; struct commit *commit; @@@ -1374,13 -1383,12 +1375,13 @@@ int cmd_commit(int argc, const char **a struct strbuf author_ident = STRBUF_INIT; const char *index_file, *reflog_msg; char *nl, *p; - unsigned char commit_sha1[20]; + unsigned char sha1[20]; struct ref_lock *ref_lock; struct commit_list *parents = NULL, **pptr = &parents; struct stat statbuf; int allow_fast_forward = 1; struct wt_status s; + struct commit *current_head = NULL; if (argc == 2 && !strcmp(argv[1], "-h")) usage_with_options(builtin_commit_usage, builtin_commit_options); @@@ -1389,38 -1397,40 +1390,38 @@@ git_config(git_commit_config, &s); determine_whence(&s); - if (s.use_color == -1) - s.use_color = git_use_color_default; - argc = parse_and_validate_options(argc, argv, builtin_commit_usage, - prefix, &s); - if (dry_run) { - if (diff_use_color_default == -1) - diff_use_color_default = git_use_color_default; - return dry_run_commit(argc, argv, prefix, &s); + if (get_sha1("HEAD", sha1)) + current_head = NULL; + else { + current_head = lookup_commit(sha1); + if (!current_head || parse_commit(current_head)) + die(_("could not parse HEAD commit")); } - index_file = prepare_index(argc, argv, prefix, 0); + argc = parse_and_validate_options(argc, argv, builtin_commit_usage, + prefix, current_head, &s); + if (dry_run) + return dry_run_commit(argc, argv, prefix, current_head, &s); + index_file = prepare_index(argc, argv, prefix, current_head, 0); /* Set up everything for writing the commit object. This includes running hooks, writing the trees, and interacting with the user. */ - if (!prepare_to_commit(index_file, prefix, &s, &author_ident)) { + if (!prepare_to_commit(index_file, prefix, + current_head, &s, &author_ident)) { rollback_index_files(); return 1; } /* Determine parents */ reflog_msg = getenv("GIT_REFLOG_ACTION"); - if (initial_commit) { + if (!current_head) { if (!reflog_msg) reflog_msg = "commit (initial)"; } else if (amend) { struct commit_list *c; - struct commit *commit; if (!reflog_msg) reflog_msg = "commit (amend)"; - commit = lookup_commit(head_sha1); - if (!commit || parse_commit(commit)) - die(_("could not parse HEAD commit")); - - for (c = commit->parents; c; c = c->next) + for (c = current_head->parents; c; c = c->next) pptr = &commit_list_insert(c->item, pptr)->next; } else if (whence == FROM_MERGE) { struct strbuf m = STRBUF_INIT; @@@ -1428,7 -1438,7 +1429,7 @@@ if (!reflog_msg) reflog_msg = "commit (merge)"; - pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next; + pptr = &commit_list_insert(current_head, pptr)->next; fp = fopen(git_path("MERGE_HEAD"), "r"); if (fp == NULL) die_errno(_("could not open '%s' for reading"), @@@ -1454,7 -1464,7 +1455,7 @@@ reflog_msg = (whence == FROM_CHERRY_PICK) ? "commit (cherry-pick)" : "commit"; - pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next; + pptr = &commit_list_insert(current_head, pptr)->next; } /* Finally, get the commit message */ @@@ -1480,7 -1490,7 +1481,7 @@@ exit(1); } - if (commit_tree(sb.buf, active_cache_tree->sha1, parents, commit_sha1, + if (commit_tree(sb.buf, active_cache_tree->sha1, parents, sha1, author_ident.buf)) { rollback_index_files(); die(_("failed to write commit object")); @@@ -1488,9 -1498,7 +1489,9 @@@ strbuf_release(&author_ident); ref_lock = lock_any_ref_for_update("HEAD", - initial_commit ? NULL : head_sha1, + !current_head + ? NULL + : current_head->object.sha1, 0); nl = strchr(sb.buf, '\n'); @@@ -1505,7 -1513,7 +1506,7 @@@ rollback_index_files(); die(_("cannot lock HEAD ref")); } - if (write_ref_sha1(ref_lock, commit_sha1, sb.buf) < 0) { + if (write_ref_sha1(ref_lock, sha1, sb.buf) < 0) { rollback_index_files(); die(_("cannot update HEAD ref")); } @@@ -1527,14 -1535,13 +1528,14 @@@ struct notes_rewrite_cfg *cfg; cfg = init_copy_notes_for_rewrite("amend"); if (cfg) { - copy_note_for_rewrite(cfg, head_sha1, commit_sha1); + /* we are amending, so current_head is not NULL */ + copy_note_for_rewrite(cfg, current_head->object.sha1, sha1); finish_copy_notes_for_rewrite(cfg); } - run_rewrite_hook(head_sha1, commit_sha1); + run_rewrite_hook(current_head->object.sha1, sha1); } if (!quiet) - print_summary(prefix, commit_sha1); + print_summary(prefix, sha1, !current_head); return 0; } diff --combined builtin/ls-files.c index e8a800d3ac,0956bb51b9..7cff175745 --- a/builtin/ls-files.c +++ b/builtin/ls-files.c @@@ -353,13 -353,11 +353,13 @@@ void overlay_tree_on_cache(const char * } } -int report_path_error(const char *ps_matched, const char **pathspec, int prefix_len) +int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix) { /* * Make sure all pathspec matched; otherwise it is an error. */ + struct strbuf sb = STRBUF_INIT; + const char *name; int num, errors = 0; for (num = 0; pathspec[num]; num++) { int other, found_dup; @@@ -384,12 -382,10 +384,12 @@@ if (found_dup) continue; + name = quote_path_relative(pathspec[num], -1, &sb, prefix); error("pathspec '%s' did not match any file(s) known to git.", - pathspec[num] + prefix_len); + name); errors++; } + strbuf_release(&sb); return errors; } @@@ -545,7 -541,7 +545,7 @@@ int cmd_ls_files(int argc, const char * strip_trailing_slash_from_submodules(); /* Find common prefix for all pathspec's */ - max_prefix = pathspec_prefix(prefix, pathspec); + max_prefix = common_prefix(pathspec); max_prefix_len = max_prefix ? strlen(max_prefix) : 0; /* Treat unmatching pathspec elements as errors */ @@@ -581,7 -577,7 +581,7 @@@ if (ps_matched) { int bad; - bad = report_path_error(ps_matched, pathspec, prefix_len); + bad = report_path_error(ps_matched, pathspec, prefix); if (bad) fprintf(stderr, "Did you forget to 'git add'?\n"); diff --combined cache.h index c989f79835,e11cf6ab1c..1aa682d83d --- a/cache.h +++ b/cache.h @@@ -6,7 -6,6 +6,7 @@@ #include "hash.h" #include "advice.h" #include "gettext.h" +#include "convert.h" #include SHA1_HEADER #ifndef git_SHA_CTX @@@ -17,27 -16,13 +17,27 @@@ #endif #include -#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200 -#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11) -#endif - -void git_inflate_init(z_streamp strm); -void git_inflate_end(z_streamp strm); -int git_inflate(z_streamp strm, int flush); +typedef struct git_zstream { + z_stream z; + unsigned long avail_in; + unsigned long avail_out; + unsigned long total_in; + unsigned long total_out; + unsigned char *next_in; + unsigned char *next_out; +} git_zstream; + +void git_inflate_init(git_zstream *); +void git_inflate_init_gzip_only(git_zstream *); +void git_inflate_end(git_zstream *); +int git_inflate(git_zstream *, int flush); + +void git_deflate_init(git_zstream *, int level); +void git_deflate_init_gzip(git_zstream *, int level); +void git_deflate_end(git_zstream *); +int git_deflate_end_gently(git_zstream *); +int git_deflate(git_zstream *, int flush); +unsigned long git_deflate_bound(git_zstream *, unsigned long); #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) #define DTYPE(de) ((de)->d_type) @@@ -394,7 -379,6 +394,7 @@@ static inline enum object_type object_t } #define GIT_DIR_ENVIRONMENT "GIT_DIR" +#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE" #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" @@@ -435,17 -419,13 +435,16 @@@ extern char *get_object_directory(void) extern char *get_index_file(void); extern char *get_graft_file(void); extern int set_git_dir(const char *path); +extern const char *get_git_namespace(void); +extern const char *strip_namespace(const char *namespaced_ref); extern const char *get_git_work_tree(void); -extern const char *read_gitfile_gently(const char *path); +extern const char *read_gitfile(const char *path); +extern const char *resolve_gitdir(const char *suspect); extern void set_git_work_tree(const char *tree); #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" extern const char **get_pathspec(const char *prefix, const char **pathspec); - extern const char *pathspec_prefix(const char *prefix, const char **pathspec); extern void setup_work_tree(void); extern const char *setup_git_directory_gently(int *); extern const char *setup_git_directory(void); @@@ -602,6 -582,35 +601,6 @@@ extern int fsync_object_files extern int core_preload_index; extern int core_apply_sparse_checkout; -enum safe_crlf { - SAFE_CRLF_FALSE = 0, - SAFE_CRLF_FAIL = 1, - SAFE_CRLF_WARN = 2 -}; - -extern enum safe_crlf safe_crlf; - -enum auto_crlf { - AUTO_CRLF_FALSE = 0, - AUTO_CRLF_TRUE = 1, - AUTO_CRLF_INPUT = -1 -}; - -extern enum auto_crlf auto_crlf; - -enum eol { - EOL_UNSET, - EOL_CRLF, - EOL_LF, -#ifdef NATIVE_CRLF - EOL_NATIVE = EOL_CRLF -#else - EOL_NATIVE = EOL_LF -#endif -}; - -extern enum eol core_eol; - enum branch_track { BRANCH_TRACK_UNSPECIFIED = -1, BRANCH_TRACK_NEVER = 0, @@@ -738,7 -747,7 +737,7 @@@ extern char *expand_user_path(const cha char *enter_repo(char *path, int strict); static inline int is_absolute_path(const char *path) { - return path[0] == '/' || has_dos_drive_prefix(path); + return is_dir_sep(path[0]) || has_dos_drive_prefix(path); } int is_directory(const char *); const char *real_path(const char *path); @@@ -771,16 -780,10 +770,16 @@@ extern int hash_sha1_file(const void *b extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1); extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *); extern int force_object_loose(const unsigned char *sha1, time_t mtime); +extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size); +extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz); +extern int parse_sha1_header(const char *hdr, unsigned long *sizep); /* global flag to enable extra checks when accessing packed objects */ extern int do_check_packed_object_crc; +/* for development: log offset of pack access */ +extern const char *log_pack_access; + extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); extern int move_temp_to_file(const char *tmpfile, const char *filename); @@@ -1006,7 -1009,7 +1005,7 @@@ extern struct packed_git *find_sha1_pac extern void pack_report(void); extern int open_pack_index(struct packed_git *); extern void close_pack_index(struct packed_git *); -extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *); +extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *); extern void close_pack_windows(struct packed_git *); extern void unuse_pack(struct pack_window **); extern void free_pack_by_name(const char *); @@@ -1018,36 -1021,7 +1017,36 @@@ extern off_t find_pack_entry_one(const extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *); extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep); extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t); -extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *); +extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *); + +struct object_info { + /* Request */ + unsigned long *sizep; + + /* Response */ + enum { + OI_CACHED, + OI_LOOSE, + OI_PACKED, + OI_DBCACHED + } whence; + union { + /* + * struct { + * ... Nothing to expose in this case + * } cached; + * struct { + * ... Nothing to expose in this case + * } loose; + */ + struct { + struct packed_git *pack; + off_t offset; + unsigned int is_delta; + } packed; + } u; +}; +extern int sha1_object_info_extended(const unsigned char *, struct object_info *); /* Dumb servers support */ extern int update_server_info(int); @@@ -1077,11 -1051,9 +1076,11 @@@ extern int git_config_bool(const char * extern int git_config_maybe_bool(const char *, const char *); extern int git_config_string(const char **, const char *, const char *); extern int git_config_pathname(const char **, const char *, const char *); +extern int git_config_set_in_file(const char *, const char *, const char *); extern int git_config_set(const char *, const char *); extern int git_config_parse_key(const char *, char **, int *); extern int git_config_set_multivar(const char *, const char *, const char *, int); +extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int); extern int git_config_rename_section(const char *, const char *); extern const char *git_etc_gitconfig(void); extern int check_repository_format_version(const char *var, const char *value, void *cb); @@@ -1091,8 -1063,6 +1090,8 @@@ extern int config_error_nonbool(const c extern const char *get_log_output_encoding(void); extern const char *get_commit_output_encoding(void); +extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data); + extern const char *config_exclusive_filename; #define MAX_GITNAME (1000) @@@ -1159,6 -1129,13 +1158,6 @@@ extern void trace_strbuf(const char *ke void packet_trace_identity(const char *prog); -/* convert.c */ -/* returns 1 if *dst was used */ -extern int convert_to_git(const char *path, const char *src, size_t len, - struct strbuf *dst, enum safe_crlf checksafe); -extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst); -extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst); - /* add */ /* * return 0 if success, 1 - if addition of a file failed and @@@ -1198,7 -1175,7 +1197,7 @@@ extern int ws_blank_line(const char *li #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK) /* ls-files */ -int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset); +int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix); void overlay_tree_on_cache(const char *tree_name, const char *prefix); char *alias_lookup(const char *alias); diff --combined setup.c index b2b4872b70,ce87900ce3..61c22e6bec --- a/setup.c +++ b/setup.c @@@ -40,6 -40,34 +40,6 @@@ char *prefix_path(const char *prefix, i return sanitized; } -/* - * Unlike prefix_path, this should be used if the named file does - * not have to interact with index entry; i.e. name of a random file - * on the filesystem. - */ -const char *prefix_filename(const char *pfx, int pfx_len, const char *arg) -{ - static char path[PATH_MAX]; -#ifndef WIN32 - if (!pfx_len || is_absolute_path(arg)) - return arg; - memcpy(path, pfx, pfx_len); - strcpy(path + pfx_len, arg); -#else - char *p; - /* don't add prefix to absolute paths, but still replace '\' by '/' */ - if (is_absolute_path(arg)) - pfx_len = 0; - else if (pfx_len) - memcpy(path, pfx, pfx_len); - strcpy(path + pfx_len, arg); - for (p = path + pfx_len; *p; p++) - if (*p == '\\') - *p = '/'; -#endif - return path; -} - int check_filename(const char *prefix, const char *arg) { const char *name; @@@ -236,38 -264,6 +236,6 @@@ const char **get_pathspec(const char *p return pathspec; } - const char *pathspec_prefix(const char *prefix, const char **pathspec) - { - const char **p, *n, *prev; - unsigned long max; - - if (!pathspec) - return prefix ? xmemdupz(prefix, strlen(prefix)) : NULL; - - prev = NULL; - max = PATH_MAX; - for (p = pathspec; (n = *p) != NULL; p++) { - int i, len = 0; - for (i = 0; i < max; i++) { - char c = n[i]; - if (prev && prev[i] != c) - break; - if (!c || c == '*' || c == '?') - break; - if (c == '/') - len = i+1; - } - prev = n; - if (len < max) { - max = len; - if (!max) - break; - } - } - - return max ? xmemdupz(prev, max) : NULL; - } - /* * Test if it looks like we're at a git directory. * We want to see: @@@ -379,7 -375,7 +347,7 @@@ static int check_repository_format_gent * Try to read the location of the git directory from the .git file, * return path to git directory if found. */ -const char *read_gitfile_gently(const char *path) +const char *read_gitfile(const char *path) { char *buf; char *dir; @@@ -441,7 -437,7 +409,7 @@@ static const char *setup_explicit_git_d if (PATH_MAX - 40 < strlen(gitdirenv)) die("'$%s' too big", GIT_DIR_ENVIRONMENT); - gitfile = (char*)read_gitfile_gently(gitdirenv); + gitfile = (char*)read_gitfile(gitdirenv); if (gitfile) { gitfile = xstrdup(gitfile); gitdirenv = gitfile; @@@ -665,7 -661,7 +633,7 @@@ static const char *setup_git_directory_ if (one_filesystem) current_device = get_device_or_die(".", NULL); for (;;) { - gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); + gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); if (gitfile) gitdirenv = gitfile = xstrdup(gitfile); else { @@@ -714,11 -710,6 +682,11 @@@ const char *setup_git_directory_gently( const char *prefix; prefix = setup_git_directory_gently_1(nongit_ok); + if (prefix) + setenv("GIT_PREFIX", prefix, 1); + else + setenv("GIT_PREFIX", "", 1); + if (startup_info) { startup_info->have_repository = !nongit_ok || !*nongit_ok; startup_info->prefix = prefix; @@@ -812,10 -803,3 +780,10 @@@ const char *setup_git_directory(void { return setup_git_directory_gently(NULL); } + +const char *resolve_gitdir(const char *suspect) +{ + if (is_git_directory(suspect)) + return suspect; + return read_gitfile(suspect); +}