From: Johannes Schindelin <johannes.schindelin@gmx.de>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>, Jeff King <peff@peff.net>,
Duy Nguyen <pclouds@gmail.com>,
Brandon Williams <bmwill@google.com>
Subject: [PATCH v5 05/11] Introduce the discover_git_directory() function
Date: Thu, 9 Mar 2017 23:24:45 +0100 (CET) [thread overview]
Message-ID: <81afe73dd398d24127683a57953ea34c7d9b92c6.1489098170.git.johannes.schindelin@gmx.de> (raw)
In-Reply-To: <cover.1489098170.git.johannes.schindelin@gmx.de>
We modified the setup_git_directory_gently_1() function earlier to make
it possible to discover the GIT_DIR without changing global state.
However, it is still a bit cumbersome to use if you only need to figure
out the (possibly absolute) path of the .git/ directory. Let's just
provide a convenient wrapper function with an easier signature that
*just* discovers the .git/ directory.
We will use it in a subsequent patch to fix the early config.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
cache.h | 7 +++++++
setup.c | 43 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+)
diff --git a/cache.h b/cache.h
index 80b6372cf76..5218726cf88 100644
--- a/cache.h
+++ b/cache.h
@@ -518,6 +518,13 @@ extern void set_git_work_tree(const char *tree);
#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
extern void setup_work_tree(void);
+/*
+ * Find GIT_DIR of the repository that contains the current working directory,
+ * without changing the working directory or other global state. The result is
+ * appended to gitdir. The return value is either NULL if no repository was
+ * found, or pointing to the path inside gitdir's buffer.
+ */
+extern const char *discover_git_directory(struct strbuf *gitdir);
extern const char *setup_git_directory_gently(int *);
extern const char *setup_git_directory(void);
extern char *prefix_path(const char *prefix, int len, const char *path);
diff --git a/setup.c b/setup.c
index a7bb09608c0..43f522fa996 100644
--- a/setup.c
+++ b/setup.c
@@ -924,6 +924,49 @@ static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir,
}
}
+const char *discover_git_directory(struct strbuf *gitdir)
+{
+ struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT;
+ size_t gitdir_offset = gitdir->len, cwd_len;
+ struct repository_format candidate;
+
+ if (strbuf_getcwd(&dir))
+ return NULL;
+
+ cwd_len = dir.len;
+ if (setup_git_directory_gently_1(&dir, gitdir) <= 0) {
+ strbuf_release(&dir);
+ return NULL;
+ }
+
+ /*
+ * The returned gitdir is relative to dir, and if dir does not reflect
+ * the current working directory, we simply make the gitdir absolute.
+ */
+ if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) {
+ /* Avoid a trailing "/." */
+ if (!strcmp(".", gitdir->buf + gitdir_offset))
+ strbuf_setlen(gitdir, gitdir_offset);
+ else
+ strbuf_addch(&dir, '/');
+ strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len);
+ }
+
+ strbuf_reset(&dir);
+ strbuf_addf(&dir, "%s/config", gitdir->buf + gitdir_offset);
+ read_repository_format(&candidate, dir.buf);
+ strbuf_release(&dir);
+
+ if (verify_repository_format(&candidate, &err) < 0) {
+ warning("ignoring git dir '%s': %s",
+ gitdir->buf + gitdir_offset, err.buf);
+ strbuf_release(&err);
+ return NULL;
+ }
+
+ return gitdir->buf + gitdir_offset;
+}
+
const char *setup_git_directory_gently(int *nongit_ok)
{
static struct strbuf cwd = STRBUF_INIT;
--
2.12.0.windows.1.7.g94dafc3b124
next prev parent reply other threads:[~2017-03-09 22:25 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-08 15:35 [PATCH/RFC 0/7] Pie-in-the-sky attempt to fix the early config Johannes Schindelin
2016-12-08 15:36 ` [PATCH/RFC 1/7] Make read_early_config() reusable Johannes Schindelin
2016-12-08 15:36 ` [PATCH/RFC 2/7] read_early_config(): avoid .git/config hack when unneeded Johannes Schindelin
2016-12-08 15:36 ` [PATCH/RFC 3/7] Mark builtins that create .git/ directories Johannes Schindelin
2016-12-08 15:36 ` [PATCH/RFC 4/7] read_early_config(): special-case `init` and `clone` Johannes Schindelin
2016-12-08 15:36 ` [PATCH/RFC 5/7] read_early_config(): really discover .git/ Johannes Schindelin
2016-12-08 15:36 ` [PATCH/RFC 6/7] WIP read_config_early(): respect ceiling directories Johannes Schindelin
2016-12-08 15:36 ` [PATCH/RFC 7/7] WIP: read_early_config(): add tests Johannes Schindelin
2016-12-08 17:26 ` [PATCH/RFC 0/7] Pie-in-the-sky attempt to fix the early config Jeff King
2016-12-09 17:28 ` Johannes Schindelin
2016-12-09 17:55 ` Jeff King
2016-12-09 12:42 ` Duy Nguyen
2016-12-09 16:52 ` Johannes Schindelin
2017-03-03 2:03 ` [PATCH v2 0/9] Fix " Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 1/9] t7006: replace dubious test Johannes Schindelin
2017-03-03 3:36 ` Jeff King
2017-03-03 11:10 ` Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 2/9] setup_git_directory(): use is_dir_sep() helper Johannes Schindelin
2017-03-03 3:37 ` Jeff King
2017-03-03 11:16 ` Johannes Schindelin
2017-03-03 11:26 ` Jeff King
2017-03-03 15:35 ` Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 3/9] setup_git_directory(): avoid changing global state during discovery Johannes Schindelin
2017-03-03 4:24 ` Jeff King
2017-03-03 13:54 ` Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 4/9] Export the discover_git_directory() function Johannes Schindelin
2017-03-03 4:45 ` Jeff King
2017-03-03 14:49 ` Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 5/9] Make read_early_config() reusable Johannes Schindelin
2017-03-03 4:46 ` Jeff King
2017-03-03 14:11 ` Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 6/9] read_early_config(): special-case builtins that create a repository Johannes Schindelin
2017-03-03 4:51 ` Jeff King
2017-03-03 15:11 ` Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 7/9] read_early_config(): avoid .git/config hack when unneeded Johannes Schindelin
2017-03-03 4:51 ` Jeff King
2017-03-03 2:04 ` [PATCH v2 8/9] read_early_config(): really discover .git/ Johannes Schindelin
2017-03-03 5:06 ` Jeff King
2017-03-03 15:26 ` Johannes Schindelin
2017-03-03 2:04 ` [PATCH v2 9/9] Test read_early_config() Johannes Schindelin
2017-03-03 5:07 ` Jeff King
2017-03-03 15:04 ` Johannes Schindelin
2017-03-03 5:14 ` [PATCH v2 0/9] Fix the early config Jeff King
2017-03-03 15:31 ` Johannes Schindelin
2017-03-03 17:31 ` [PATCH v3 " Johannes Schindelin
2017-03-03 17:32 ` [PATCH v3 1/9] t7006: replace dubious test Johannes Schindelin
2017-03-03 17:32 ` [PATCH v3 2/9] setup_git_directory(): use is_dir_sep() helper Johannes Schindelin
2017-03-03 17:32 ` [PATCH v3 3/9] Prepare setup_discovered_git_directory() the root directory Johannes Schindelin
2017-03-03 17:32 ` [PATCH v3 4/9] setup_git_directory_1(): avoid changing global state Johannes Schindelin
2017-03-03 17:33 ` [PATCH v3 5/9] Export the discover_git_directory() function Johannes Schindelin
2017-03-03 17:33 ` [PATCH v3 6/9] Make read_early_config() reusable Johannes Schindelin
2017-03-03 17:33 ` [PATCH v3 7/9] read_early_config(): avoid .git/config hack when unneeded Johannes Schindelin
2017-03-03 17:33 ` [PATCH v3 8/9] read_early_config(): really discover .git/ Johannes Schindelin
2017-03-03 17:33 ` [PATCH v3 9/9] Test read_early_config() Johannes Schindelin
2017-03-03 21:35 ` [PATCH v3 0/9] Fix the early config Junio C Hamano
2017-03-07 11:55 ` Johannes Schindelin
2017-03-07 15:18 ` Johannes Schindelin
2017-03-04 7:39 ` Jeff King
2017-03-05 3:36 ` Junio C Hamano
2017-03-07 14:31 ` Johannes Schindelin
2017-03-08 7:30 ` Jeff King
2017-03-08 16:18 ` Johannes Schindelin
2017-03-08 16:29 ` Jeff King
2017-03-08 17:09 ` Junio C Hamano
2017-03-08 17:42 ` Jeff King
2017-03-08 22:43 ` Junio C Hamano
2017-03-09 11:51 ` Johannes Schindelin
2017-03-09 12:16 ` Jeff King
2017-03-10 16:39 ` Junio C Hamano
2017-03-07 14:32 ` [PATCH v4 00/10] " Johannes Schindelin
2017-03-07 14:32 ` [PATCH v4 01/10] t7006: replace dubious test Johannes Schindelin
2017-03-07 14:32 ` [PATCH v4 02/10] setup_git_directory(): use is_dir_sep() helper Johannes Schindelin
2017-03-07 14:32 ` [PATCH v4 03/10] Prepare setup_discovered_git_directory() the root directory Johannes Schindelin
2017-03-07 14:32 ` [PATCH v4 04/10] setup_git_directory_1(): avoid changing global state Johannes Schindelin
2017-03-07 23:24 ` Junio C Hamano
2017-03-07 23:35 ` Brandon Williams
2017-03-08 0:57 ` Johannes Schindelin
2017-03-08 2:10 ` Brandon Williams
2017-03-07 14:33 ` [PATCH v4 05/10] Introduce the discover_git_directory() function Johannes Schindelin
2017-03-07 14:33 ` [PATCH v4 06/10] Make read_early_config() reusable Johannes Schindelin
2017-03-07 14:33 ` [PATCH v4 07/10] read_early_config(): avoid .git/config hack when unneeded Johannes Schindelin
2017-03-07 14:33 ` [PATCH v4 08/10] read_early_config(): really discover .git/ Johannes Schindelin
2017-03-07 14:33 ` [PATCH v4 09/10] Test read_early_config() Johannes Schindelin
2017-03-07 14:33 ` [PATCH v4 10/10] setup_git_directory_gently_1(): avoid die()ing Johannes Schindelin
2017-03-09 22:23 ` [PATCH v5 00/11] Fix the early config Johannes Schindelin
2017-03-09 22:23 ` [PATCH v5 01/11] t7006: replace dubious test Johannes Schindelin
2017-03-09 22:23 ` [PATCH v5 02/11] setup_git_directory(): use is_dir_sep() helper Johannes Schindelin
2017-03-09 22:23 ` [PATCH v5 03/11] Prepare setup_discovered_git_directory() the root directory Johannes Schindelin
2017-03-09 22:24 ` [PATCH v5 04/11] setup_git_directory_1(): avoid changing global state Johannes Schindelin
2017-03-10 19:34 ` Junio C Hamano
2017-03-09 22:24 ` Johannes Schindelin [this message]
2017-03-09 22:24 ` [PATCH v5 06/11] Make read_early_config() reusable Johannes Schindelin
2017-03-09 22:24 ` [PATCH v5 07/11] read_early_config(): avoid .git/config hack when unneeded Johannes Schindelin
2017-03-09 22:25 ` [PATCH v5 08/11] read_early_config(): really discover .git/ Johannes Schindelin
2017-03-09 22:25 ` [PATCH v5 09/11] Test read_early_config() Johannes Schindelin
2017-03-10 19:02 ` Junio C Hamano
2017-03-13 17:19 ` Johannes Schindelin
2017-03-13 17:32 ` Junio C Hamano
2017-03-09 22:25 ` [PATCH v5 10/11] setup_git_directory_gently_1(): avoid die()ing Johannes Schindelin
2017-03-10 18:58 ` Junio C Hamano
2017-03-13 19:38 ` Johannes Schindelin
2017-03-13 19:47 ` Junio C Hamano
2017-03-13 20:20 ` Junio C Hamano
2017-03-13 21:46 ` Johannes Schindelin
2017-03-13 23:31 ` Junio C Hamano
2017-03-09 22:25 ` [PATCH v5 11/11] t1309: document cases where we would want early config not to die() Johannes Schindelin
2017-03-13 20:09 ` [PATCH v6 00/12] Fix the early config Johannes Schindelin
2017-03-13 20:09 ` [PATCH v6 01/12] t7006: replace dubious test Johannes Schindelin
2017-03-13 20:09 ` [PATCH v6 02/12] setup_git_directory(): use is_dir_sep() helper Johannes Schindelin
2017-03-13 20:09 ` [PATCH v6 03/12] Prepare setup_discovered_git_directory() the root directory Johannes Schindelin
2017-03-13 20:34 ` Junio C Hamano
2017-03-13 21:44 ` Johannes Schindelin
2017-03-13 20:10 ` [PATCH v6 04/12] setup_git_directory_1(): avoid changing global state Johannes Schindelin
2017-03-13 20:10 ` [PATCH v6 05/12] Introduce the discover_git_directory() function Johannes Schindelin
2017-03-13 20:11 ` [PATCH v6 06/12] Make read_early_config() reusable Johannes Schindelin
2017-03-13 20:11 ` [PATCH v6 07/12] read_early_config(): avoid .git/config hack when unneeded Johannes Schindelin
2017-03-13 20:11 ` [PATCH v6 08/12] read_early_config(): really discover .git/ Johannes Schindelin
2017-03-13 20:11 ` [PATCH v6 09/12] Add t1309 to test read_early_config() Johannes Schindelin
2017-03-13 20:11 ` [PATCH v6 10/12] setup_git_directory_gently_1(): avoid die()ing Johannes Schindelin
2017-03-13 20:11 ` [PATCH v6 11/12] t1309: document cases where we would want early config not to die() Johannes Schindelin
2017-03-13 20:12 ` [PATCH v6 12/12] setup.c: mention unresolved problems Johannes Schindelin
2017-03-13 22:31 ` [PATCH v6 00/12] Fix the early config Junio C Hamano
2017-03-14 18:01 ` Jeff King
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