From a797c0ea042af697d82ad475b9f354c4a33a9047 Mon Sep 17 00:00:00 2001 From: Siddharth Asthana Date: Tue, 20 Dec 2022 11:31:13 +0530 Subject: cat-file: add mailmap support to --batch-check option MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Even though the cat-file command with `--batch-check` option does not complain when `--use-mailmap` option is given, the latter option is ignored. Compute the size of the object after replacing the idents and report it instead. In order to make `--batch-check` option honour the mailmap mechanism we have to read the contents of the commit/tag object. There were two ways to do it: 1. Make two calls to `oid_object_info_extended()`. If `--use-mailmap` option is given, the first call will get us the type of the object and second call will only be made if the object type is either a commit or tag to get the contents of the object. 2. Make one call to `oid_object_info_extended()` to get the type of the object. Then, if the object type is either of commit or tag, make a call to `repo_read_object_file()` to read the contents of the object. I benchmarked the following command with both the above approaches and compared against the current implementation where `--use-mailmap` option is ignored: `git cat-file --use-mailmap --batch-all-objects --batch-check --buffer --unordered` The results can be summarized as follows: Time (mean ± σ) default 827.7 ms ± 104.8 ms first approach 6.197 s ± 0.093 s second approach 1.975 s ± 0.217 s Since, the second approach is faster than the first one, I implemented it in this patch. The command git cat-file can now use the mailmap mechanism to replace idents with canonical versions for commit and tag objects. There are several options like `--batch`, `--batch-check` and `--batch-command` that can be combined with `--use-mailmap`. But the documentation for `--batch`, `--batch-check` and `--batch-command` doesn't say so. This patch fixes that documentation. Mentored-by: Christian Couder Mentored-by: John Cai Helped-by: Taylor Blau Helped-by: Ævar Arnfjörð Bjarmason Signed-off-by: Siddharth Asthana Signed-off-by: Junio C Hamano --- builtin/cat-file.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'builtin/cat-file.c') diff --git a/builtin/cat-file.c b/builtin/cat-file.c index 8a6e2343ec..1a8d90b5f5 100644 --- a/builtin/cat-file.c +++ b/builtin/cat-file.c @@ -444,6 +444,9 @@ static void batch_object_write(const char *obj_name, if (!data->skip_object_info) { int ret; + if (use_mailmap) + data->info.typep = &data->type; + if (pack) ret = packed_object_info(the_repository, pack, offset, &data->info); @@ -457,6 +460,18 @@ static void batch_object_write(const char *obj_name, fflush(stdout); return; } + + if (use_mailmap && (data->type == OBJ_COMMIT || data->type == OBJ_TAG)) { + size_t s = data->size; + char *buf = NULL; + + buf = repo_read_object_file(the_repository, &data->oid, &data->type, + &data->size); + buf = replace_idents_using_mailmap(buf, &s); + data->size = cast_size_t_to_ulong(s); + + free(buf); + } } strbuf_reset(scratch); -- cgit v1.2.3