diff options
| -rw-r--r-- | Documentation/git-rev-parse.txt | 6 | ||||
| -rw-r--r-- | builtin/rev-parse.c | 7 | ||||
| -rw-r--r-- | submodule.c | 82 | ||||
| -rw-r--r-- | submodule.h | 8 | ||||
| -rwxr-xr-x | t/t1500-rev-parse.sh | 14 |
5 files changed, 117 insertions, 0 deletions
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt index 91c02b8c85..c40c470448 100644 --- a/Documentation/git-rev-parse.txt +++ b/Documentation/git-rev-parse.txt @@ -261,6 +261,12 @@ print a message to stderr and exit with nonzero status. --show-toplevel:: Show the absolute path of the top-level directory. +--show-superproject-working-tree + Show the absolute path of the root of the superproject's + working tree (if exists) that uses the current repository as + its submodule. Outputs nothing if the current repository is + not used as a submodule by any project. + --shared-index-path:: Show the path to the shared index file in split index mode, or empty if not in split-index mode. diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c index e08677e559..2549643267 100644 --- a/builtin/rev-parse.c +++ b/builtin/rev-parse.c @@ -12,6 +12,7 @@ #include "diff.h" #include "revision.h" #include "split-index.h" +#include "submodule.h" #define DO_REVS 1 #define DO_NOREV 2 @@ -779,6 +780,12 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix) puts(work_tree); continue; } + if (!strcmp(arg, "--show-superproject-working-tree")) { + const char *superproject = get_superproject_working_tree(); + if (superproject) + puts(superproject); + continue; + } if (!strcmp(arg, "--show-prefix")) { if (prefix) puts(prefix); diff --git a/submodule.c b/submodule.c index 3b98766a6b..bb405653fd 100644 --- a/submodule.c +++ b/submodule.c @@ -1514,3 +1514,85 @@ void absorb_git_dir_into_superproject(const char *prefix, strbuf_release(&sb); } } + +const char *get_superproject_working_tree(void) +{ + struct child_process cp = CHILD_PROCESS_INIT; + struct strbuf sb = STRBUF_INIT; + const char *one_up = real_path_if_valid("../"); + const char *cwd = xgetcwd(); + const char *ret = NULL; + const char *subpath; + int code; + ssize_t len; + + if (!is_inside_work_tree()) + /* + * FIXME: + * We might have a superproject, but it is harder + * to determine. + */ + return NULL; + + if (!one_up) + return NULL; + + subpath = relative_path(cwd, one_up, &sb); + + prepare_submodule_repo_env(&cp.env_array); + argv_array_pop(&cp.env_array); + + argv_array_pushl(&cp.args, "--literal-pathspecs", "-C", "..", + "ls-files", "-z", "--stage", "--full-name", "--", + subpath, NULL); + strbuf_reset(&sb); + + cp.no_stdin = 1; + cp.no_stderr = 1; + cp.out = -1; + cp.git_cmd = 1; + + if (start_command(&cp)) + die(_("could not start ls-files in ..")); + + len = strbuf_read(&sb, cp.out, PATH_MAX); + close(cp.out); + + if (starts_with(sb.buf, "160000")) { + int super_sub_len; + int cwd_len = strlen(cwd); + char *super_sub, *super_wt; + + /* + * There is a superproject having this repo as a submodule. + * The format is <mode> SP <hash> SP <stage> TAB <full name> \0, + * We're only interested in the name after the tab. + */ + super_sub = strchr(sb.buf, '\t') + 1; + super_sub_len = sb.buf + sb.len - super_sub - 1; + + if (super_sub_len > cwd_len || + strcmp(&cwd[cwd_len - super_sub_len], super_sub)) + die (_("BUG: returned path string doesn't match cwd?")); + + super_wt = xstrdup(cwd); + super_wt[cwd_len - super_sub_len] = '\0'; + + ret = real_path(super_wt); + free(super_wt); + } + strbuf_release(&sb); + + code = finish_command(&cp); + + if (code == 128) + /* '../' is not a git repository */ + return NULL; + if (code == 0 && len == 0) + /* There is an unrelated git repository at '../' */ + return NULL; + if (code) + die(_("ls-tree returned unexpected return code %d"), code); + + return ret; +} diff --git a/submodule.h b/submodule.h index 05ab674f06..c8a0c9cb29 100644 --- a/submodule.h +++ b/submodule.h @@ -93,4 +93,12 @@ extern void prepare_submodule_repo_env(struct argv_array *out); extern void absorb_git_dir_into_superproject(const char *prefix, const char *path, unsigned flags); + +/* + * Return the absolute path of the working tree of the superproject, which this + * project is a submodule of. If this repository is not a submodule of + * another repository, return NULL. + */ +extern const char *get_superproject_working_tree(void); + #endif diff --git a/t/t1500-rev-parse.sh b/t/t1500-rev-parse.sh index 9ed8b8ccba..03d3c7f6d6 100755 --- a/t/t1500-rev-parse.sh +++ b/t/t1500-rev-parse.sh @@ -116,4 +116,18 @@ test_expect_success 'git-path inside sub-dir' ' test_cmp expect actual ' +test_expect_success 'showing the superproject correctly' ' + git rev-parse --show-superproject-working-tree >out && + test_must_be_empty out && + + test_create_repo super && + test_commit -C super test_commit && + test_create_repo sub && + test_commit -C sub test_commit && + git -C super submodule add ../sub dir/sub && + echo $(pwd)/super >expect && + git -C super/dir/sub rev-parse --show-superproject-working-tree >out && + test_cmp expect out +' + test_done |