diff options
| -rw-r--r-- | Documentation/repository-layout.txt | 5 | ||||
| -rw-r--r-- | cache.h | 1 | ||||
| -rw-r--r-- | environment.c | 2 | ||||
| -rw-r--r-- | setup.c | 47 | ||||
| -rwxr-xr-x | t/t0002-gitfile.sh | 103 |
5 files changed, 157 insertions, 1 deletions
diff --git a/Documentation/repository-layout.txt b/Documentation/repository-layout.txt index 6939130094..bbaed2e129 100644 --- a/Documentation/repository-layout.txt +++ b/Documentation/repository-layout.txt @@ -3,7 +3,10 @@ git repository layout You may find these things in your git repository (`.git` directory for a repository associated with your working tree, or -`'project'.git` directory for a public 'bare' repository). +`'project'.git` directory for a public 'bare' repository. It is +also possible to have a working tree where `.git` is a plain +ascii file containing `gitdir: <path>`, i.e. the path to the +real git repository). objects:: Object store associated with this repository. Usually @@ -311,6 +311,7 @@ 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_work_tree(void); +extern const char *read_gitfile_gently(const char *path); #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" diff --git a/environment.c b/environment.c index 6739a3f417..fcd1ee5ef8 100644 --- a/environment.c +++ b/environment.c @@ -50,6 +50,8 @@ static void setup_git_env(void) { git_dir = getenv(GIT_DIR_ENVIRONMENT); if (!git_dir) + git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); + if (!git_dir) git_dir = DEFAULT_GIT_DIR_ENVIRONMENT; git_object_dir = getenv(DB_ENVIRONMENT); if (!git_object_dir) { @@ -315,6 +315,44 @@ static int check_repository_format_gently(int *nongit_ok) } /* + * 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) +{ + char *buf; + struct stat st; + int fd; + size_t len; + + if (stat(path, &st)) + return NULL; + if (!S_ISREG(st.st_mode)) + return NULL; + fd = open(path, O_RDONLY); + if (fd < 0) + die("Error opening %s: %s", path, strerror(errno)); + buf = xmalloc(st.st_size + 1); + len = read_in_full(fd, buf, st.st_size); + close(fd); + if (len != st.st_size) + die("Error reading %s", path); + buf[len] = '\0'; + if (prefixcmp(buf, "gitdir: ")) + die("Invalid gitfile format: %s", path); + while (buf[len - 1] == '\n' || buf[len - 1] == '\r') + len--; + if (len < 9) + die("No path in gitfile: %s", path); + buf[len] = '\0'; + if (!is_git_directory(buf + 8)) + die("Not a git repository: %s", buf + 8); + path = make_absolute_path(buf + 8); + free(buf); + return path; +} + +/* * We cannot decide in this function whether we are in the work tree or * not, since the config can only be read _after_ this function was called. */ @@ -323,6 +361,7 @@ const char *setup_git_directory_gently(int *nongit_ok) const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); static char cwd[PATH_MAX+1]; const char *gitdirenv; + const char *gitfile_dir; int len, offset; /* @@ -377,8 +416,10 @@ const char *setup_git_directory_gently(int *nongit_ok) /* * Test in the following order (relative to the cwd): + * - .git (file containing "gitdir: <path>") * - .git/ * - ./ (bare) + * - ../.git * - ../.git/ * - ../ (bare) * - ../../.git/ @@ -386,6 +427,12 @@ const char *setup_git_directory_gently(int *nongit_ok) */ offset = len = strlen(cwd); for (;;) { + gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); + if (gitfile_dir) { + if (set_git_dir(gitfile_dir)) + die("Repository setup failed"); + break; + } if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) break; if (is_git_directory(".")) { diff --git a/t/t0002-gitfile.sh b/t/t0002-gitfile.sh new file mode 100755 index 0000000000..c5dbc724b6 --- /dev/null +++ b/t/t0002-gitfile.sh @@ -0,0 +1,103 @@ +#!/bin/sh + +test_description='.git file + +Verify that plumbing commands work when .git is a file +' +. ./test-lib.sh + +objpath() { + echo "$1" | sed -e 's|\(..\)|\1/|' +} + +objck() { + p=$(objpath "$1") + if test ! -f "$REAL/objects/$p" + then + echo "Object not found: $REAL/objects/$p" + false + fi +} + + +test_expect_success 'initial setup' ' + REAL="$(pwd)/.real" && + mv .git "$REAL" +' + +test_expect_success 'bad setup: invalid .git file format' ' + echo "gitdir $REAL" >.git && + if git rev-parse 2>.err + then + echo "git rev-parse accepted an invalid .git file" + false + fi && + if ! grep -qe "Invalid gitfile format" .err + then + echo "git rev-parse returned wrong error" + false + fi +' + +test_expect_success 'bad setup: invalid .git file path' ' + echo "gitdir: $REAL.not" >.git && + if git rev-parse 2>.err + then + echo "git rev-parse accepted an invalid .git file path" + false + fi && + if ! grep -qe "Not a git repository" .err + then + echo "git rev-parse returned wrong error" + false + fi +' + +test_expect_success 'final setup + check rev-parse --git-dir' ' + echo "gitdir: $REAL" >.git && + test "$REAL" = "$(git rev-parse --git-dir)" +' + +test_expect_success 'check hash-object' ' + echo "foo" >bar && + SHA=$(cat bar | git hash-object -w --stdin) && + objck $SHA +' + +test_expect_success 'check cat-file' ' + git cat-file blob $SHA >actual && + diff -u bar actual +' + +test_expect_success 'check update-index' ' + if test -f "$REAL/index" + then + echo "Hmm, $REAL/index exists?" + false + fi && + rm -f "$REAL/objects/$(objpath $SHA)" && + git update-index --add bar && + if ! test -f "$REAL/index" + then + echo "$REAL/index not found" + false + fi && + objck $SHA +' + +test_expect_success 'check write-tree' ' + SHA=$(git write-tree) && + objck $SHA +' + +test_expect_success 'check commit-tree' ' + SHA=$(echo "commit bar" | git commit-tree $SHA) && + objck $SHA +' + +test_expect_success 'check rev-list' ' + echo $SHA >"$REAL/HEAD" && + test "$SHA" = "$(git rev-list HEAD)" +' + +test_done |