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![]() Add a --format option to ls-tree. It has an existing default output, and then --long and --name-only options to emit the default output along with the objectsize and, or to only emit object paths. Rather than add --type-only, --object-only etc. we can just support a --format using a strbuf_expand() similar to "for-each-ref --format". We might still add such options in the future for convenience. The --format implementation is slower than the existing code, but this change does not cause any performance regressions. We'll leave the existing show_tree() unchanged, and only run show_tree_fmt() in if a --format different than the hardcoded built-in ones corresponding to the existing modes is provided. I.e. something like the "--long" output would be much slower with this, mainly due to how we need to allocate various things to do with quote.c instead of spewing the output directly to stdout. The new option of '--format' comes from Ævar Arnfjörð Bjarmasonn's idea and suggestion, this commit makes modifications in terms of the original discussion on community [1]. In [1] there was a "GIT_TEST_LS_TREE_FORMAT_BACKEND" variable to ensure that we had test coverage for passing tests that would otherwise use show_tree() through show_tree_fmt(), and thus that the formatting mechanism could handle all the same cases as the non-formatting options. Somewhere in subsequent re-rolls of that we seem to have drifted away from what the goal of these tests should be. We're trying to ensure correctness of show_tree_fmt(). We can't tell if we "hit [the] fast-path" here, and instead of having an explicit test for that, we can just add it to something our "test_ls_tree_format" tests for. Here is the statistics about performance tests: 1. Default format (hitten the builtin formats): "git ls-tree <tree-ish>" vs "--format='%(mode) %(type) %(object)%x09%(file)'" $hyperfine --warmup=10 "/opt/git/master/bin/git ls-tree -r HEAD" Benchmark 1: /opt/git/master/bin/git ls-tree -r HEAD Time (mean ± σ): 105.2 ms ± 3.3 ms [User: 84.3 ms, System: 20.8 ms] Range (min … max): 99.2 ms … 113.2 ms 28 runs $hyperfine --warmup=10 "/opt/git/ls-tree-oid-only/bin/git ls-tree -r --format='%(mode) %(type) %(object)%x09%(file)' HEAD" Benchmark 1: /opt/git/ls-tree-oid-only/bin/git ls-tree -r --format='%(mode) %(type) %(object)%x09%(file)' HEAD Time (mean ± σ): 106.4 ms ± 2.7 ms [User: 86.1 ms, System: 20.2 ms] Range (min … max): 100.2 ms … 110.5 ms 29 runs 2. Default format includes object size (hitten the builtin formats): "git ls-tree -l <tree-ish>" vs "--format='%(mode) %(type) %(object) %(size:padded)%x09%(file)'" $hyperfine --warmup=10 "/opt/git/master/bin/git ls-tree -r -l HEAD" Benchmark 1: /opt/git/master/bin/git ls-tree -r -l HEAD Time (mean ± σ): 335.1 ms ± 6.5 ms [User: 304.6 ms, System: 30.4 ms] Range (min … max): 327.5 ms … 348.4 ms 10 runs $hyperfine --warmup=10 "/opt/git/ls-tree-oid-only/bin/git ls-tree -r --format='%(mode) %(type) %(object) %(size:padded)%x09%(file)' HEAD" Benchmark 1: /opt/git/ls-tree-oid-only/bin/git ls-tree -r --format='%(mode) %(type) %(object) %(size:padded)%x09%(file)' HEAD Time (mean ± σ): 337.2 ms ± 8.2 ms [User: 309.2 ms, System: 27.9 ms] Range (min … max): 328.8 ms … 349.4 ms 10 runs Links: [1] https://public-inbox.org/git/RFC-patch-6.7-eac299f06ff-20211217T131635Z-avarab@gmail.com/ [2] https://lore.kernel.org/git/cb717d08be87e3239117c6c667cb32caabaad33d.1646390152.git.dyroneteng@gmail.com/ Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Teng Long <dyroneteng@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> |
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.. | ||
add.c | ||
am.c | ||
annotate.c | ||
apply.c | ||
archive.c | ||
bisect--helper.c | ||
blame.c | ||
branch.c | ||
bugreport.c | ||
bundle.c | ||
cat-file.c | ||
check-attr.c | ||
check-ignore.c | ||
check-mailmap.c | ||
check-ref-format.c | ||
checkout--worker.c | ||
checkout-index.c | ||
checkout.c | ||
clean.c | ||
clone.c | ||
column.c | ||
commit-graph.c | ||
commit-tree.c | ||
commit.c | ||
config.c | ||
count-objects.c | ||
credential-cache--daemon.c | ||
credential-cache.c | ||
credential-store.c | ||
credential.c | ||
describe.c | ||
diff-files.c | ||
diff-index.c | ||
diff-tree.c | ||
diff.c | ||
difftool.c | ||
env--helper.c | ||
fast-export.c | ||
fast-import.c | ||
fetch-pack.c | ||
fetch.c | ||
fmt-merge-msg.c | ||
for-each-ref.c | ||
for-each-repo.c | ||
fsck.c | ||
gc.c | ||
get-tar-commit-id.c | ||
grep.c | ||
hash-object.c | ||
help.c | ||
index-pack.c | ||
init-db.c | ||
interpret-trailers.c | ||
log.c | ||
ls-files.c | ||
ls-remote.c | ||
ls-tree.c | ||
mailinfo.c | ||
mailsplit.c | ||
merge-base.c | ||
merge-file.c | ||
merge-index.c | ||
merge-ours.c | ||
merge-recursive.c | ||
merge-tree.c | ||
merge.c | ||
mktag.c | ||
mktree.c | ||
multi-pack-index.c | ||
mv.c | ||
name-rev.c | ||
notes.c | ||
pack-objects.c | ||
pack-redundant.c | ||
pack-refs.c | ||
patch-id.c | ||
prune-packed.c | ||
prune.c | ||
pull.c | ||
push.c | ||
range-diff.c | ||
read-tree.c | ||
rebase.c | ||
receive-pack.c | ||
reflog.c | ||
remote-ext.c | ||
remote-fd.c | ||
remote.c | ||
repack.c | ||
replace.c | ||
rerere.c | ||
reset.c | ||
rev-list.c | ||
rev-parse.c | ||
revert.c | ||
rm.c | ||
send-pack.c | ||
shortlog.c | ||
show-branch.c | ||
show-index.c | ||
show-ref.c | ||
sparse-checkout.c | ||
stash.c | ||
stripspace.c | ||
submodule--helper.c | ||
symbolic-ref.c | ||
tag.c | ||
unpack-file.c | ||
unpack-objects.c | ||
update-index.c | ||
update-ref.c | ||
update-server-info.c | ||
upload-archive.c | ||
upload-pack.c | ||
var.c | ||
verify-commit.c | ||
verify-pack.c | ||
verify-tag.c | ||
worktree.c | ||
write-tree.c |