[GSoC][PATCH 3/6] submodule: port set_name_rev from shell to C
- From
Prathamesh Chavan <pc44800@gmail.com>
- Date
- Jun 19, 2017, 21:50 UTC
- Message-ID
- <20170619215025.10086-3-pc44800@gmail.com>
- In-Reply-To
- <20170619215025.10086-1-pc44800@gmail.com>
Since later on we want to port submodule subcommand status, and since set_name_rev is part of cmd_status, hence this function is ported. It has been ported to function print_name_rev in C, which calls get_name_rev to get the revname, and after formatting it, print_name_rev prints it. And hence in this way, the command `git submodule--helper print-name-rev "sm_path" "sha1"` sets value of revname in git-submodule.sh
The function get_name_rev returns the stdout of the git describe commands. Since there are four different git-describe commands used for generating the name rev, four child_process are introduced, each successive child process running only when previous has no stdout. The order of these four git-describe commands is maintained the same as it was in the function set_name_rev() in shell script.
Mentored-by: Christian Couder <christian.couder@gmail.com> Mentored-by: Stefan Beller <sbeller@google.com> Signed-off-by: Prathamesh Chavan <pc44800@gmail.com> --- builtin/submodule--helper.c | 69 +++++++++++++++++++++++++++++++++++++++++++++ git-submodule.sh | 16 ++--------- 2 files changed, 71 insertions(+), 14 deletions(-)
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c index f7adca95b..6fd861e42 100644 --- a/builtin/submodule--helper.c +++ b/builtin/submodule--helper.c @@ -243,6 +243,74 @@ static char *get_submodule_displaypath(const char *path, const char *prefix) } } +enum describe_step { + step_bare, + step_tags, + step_contains, + step_all_always, + step_end +}; + +static char *get_name_rev(const char *sub_path, const char* object_id) +{ + struct strbuf sb = STRBUF_INIT; + enum describe_step cur_step; + + for (cur_step = step_bare; cur_step < step_end; cur_step++) { + struct child_process cp = CHILD_PROCESS_INIT; + prepare_submodule_repo_env(&cp.env_array); + cp.dir = sub_path; + cp.git_cmd = 1; + cp.no_stderr = 1; + + switch (cur_step) { + case step_bare: + argv_array_pushl(&cp.args, "describe", + object_id, NULL); + break; + case step_tags: + argv_array_pushl(&cp.args, "describe", + "--tags", object_id, NULL); + break; + case step_contains: + argv_array_pushl(&cp.args, "describe", + "--contains", object_id, + NULL); + break; + case step_all_always: + argv_array_pushl(&cp.args, "describe", + "--all", "--always", + object_id, NULL); + break; + default: + BUG("unknown describe step '%d'", cur_step); + } + + if (!capture_command(&cp, &sb, 0) && sb.len) { + strbuf_strip_suffix(&sb, "\n"); + return strbuf_detach(&sb, NULL); + } + + } + + strbuf_release(&sb); + return NULL; +} + +static int print_name_rev(int argc, const char **argv, const char *prefix) +{ + char *namerev; + if (argc != 3) + die("print-name-rev only accepts two arguments: <path> <sha1>"); + + namerev = get_name_rev(argv[1], argv[2]); + if (namerev && namerev[0]) + printf(" (%s)", namerev); + printf("\n"); + + return 0; +} + struct module_list { const struct cache_entry **entries; int alloc, nr; @@ -1242,6 +1310,7 @@ static struct cmd_struct commands[] = { {"relative-path", resolve_relative_path, 0}, {"resolve-relative-url", resolve_relative_url, 0}, {"resolve-relative-url-test", resolve_relative_url_test, 0}, + {"print-name-rev", print_name_rev, 0}, {"init", module_init, SUPPORT_SUPER_PREFIX}, {"remote-branch", resolve_remote_submodule_branch, 0}, {"push-check", push_check, 0}, diff --git a/git-submodule.sh b/git-submodule.sh index c0d0e9a4c..091051891 100755 --- a/git-submodule.sh +++ b/git-submodule.sh @@ -758,18 +758,6 @@ cmd_update() } } -set_name_rev () { - revname=$( ( - sanitize_submodule_env - cd "$1" && { - git describe "$2" 2>/dev/null || - git describe --tags "$2" 2>/dev/null || - git describe --contains "$2" 2>/dev/null || - git describe --all --always "$2" - } - ) ) - test -z "$revname" || revname=" ($revname)" -} # # Show commit summary for submodules in index or working tree # @@ -1041,14 +1029,14 @@ cmd_status() fi if git diff-files --ignore-submodules=dirty --quiet -- "$sm_path" then - set_name_rev "$sm_path" "$sha1" + revname=$(git submodule--helper print-name-rev "$sm_path" "$sha1") say " $sha1 $displaypath$revname" else if test -z "$cached" then sha1=$(sanitize_submodule_env; cd "$sm_path" && git rev-parse --verify HEAD) fi - set_name_rev "$sm_path" "$sha1" + revname=$(git submodule--helper print-name-rev "$sm_path" "$sha1") say "+$sha1 $displaypath$revname" fi
-- 2.13.0