From daa1acefc55bb6492c00519634e0a7622b3b6d69 Mon Sep 17 00:00:00 2001 From: Derrick Stolee Date: Tue, 29 Jun 2021 02:13:04 +0000 Subject: commit: integrate with sparse-index Update 'git commit' to allow using the sparse-index in memory without expanding to a full one. The only place that had an ensure_full_index() call was in cache_tree_update(). The recursive algorithm for update_one() was already updated in 2de37c536 (cache-tree: integrate with sparse directory entries, 2021-03-03) to handle sparse directory entries in the index. Most of this change involves testing different command-line options that allow specifying which on-disk changes should be included in the commit. This includes no options (only take currently-staged changes), -a (take all tracked changes), and --include (take a list of specific changes). To simplify testing that these options do not expand the index, update the test that previously verified that 'git status' does not expand the index with a helper method, ensure_not_expanded(). This allows 'git commit' to operate much faster when the sparse-checkout cone is much smaller than the full list of files at HEAD. Here are the relevant lines from p2000-sparse-operations.sh: Test HEAD~1 HEAD ---------------------------------------------------------------------------------- 2000.14: git commit -a -m A (full-v3) 0.35(0.26+0.06) 0.36(0.28+0.07) +2.9% 2000.15: git commit -a -m A (full-v4) 0.32(0.26+0.05) 0.34(0.28+0.06) +6.3% 2000.16: git commit -a -m A (sparse-v3) 0.63(0.59+0.06) 0.04(0.05+0.05) -93.7% 2000.17: git commit -a -m A (sparse-v4) 0.64(0.59+0.08) 0.04(0.04+0.04) -93.8% It is important to compare the full-index case to the sparse-index case, so the improvement for index version v4 is actually an 88% improvement in this synthetic example. In a real repository with over two million files at HEAD and 60,000 files in the sparse-checkout definition, the time for 'git commit -a' went from 2.61 seconds to 134ms. I compared this to the result if the index only contained the paths in the sparse-checkout definition and found the theoretical optimum to be 120ms, so the out-of-cone paths only add a 12% overhead. Signed-off-by: Derrick Stolee Signed-off-by: Junio C Hamano --- t/t1092-sparse-checkout-compatibility.sh | 47 +++++++++++++++++++++++++++++--- 1 file changed, 43 insertions(+), 4 deletions(-) (limited to 't') diff --git a/t/t1092-sparse-checkout-compatibility.sh b/t/t1092-sparse-checkout-compatibility.sh index cabbd42e33..d3e34d0aca 100755 --- a/t/t1092-sparse-checkout-compatibility.sh +++ b/t/t1092-sparse-checkout-compatibility.sh @@ -262,6 +262,34 @@ test_expect_success 'add, commit, checkout' ' test_all_match git checkout - ' +test_expect_success 'commit including unstaged changes' ' + init_repos && + + write_script edit-file <<-\EOF && + echo $1 >$2 + EOF + + run_on_all ../edit-file 1 a && + run_on_all ../edit-file 1 deep/a && + + test_all_match git commit -m "-a" -a && + test_all_match git status --porcelain=v2 && + + run_on_all ../edit-file 2 a && + run_on_all ../edit-file 2 deep/a && + + test_all_match git commit -m "--include" --include deep/a && + test_all_match git status --porcelain=v2 && + test_all_match git commit -m "--include" --include a && + test_all_match git status --porcelain=v2 && + + run_on_all ../edit-file 3 a && + run_on_all ../edit-file 3 deep/a && + + test_all_match git commit -m "--amend" -a --amend && + test_all_match git status --porcelain=v2 +' + test_expect_success 'status/add: outside sparse cone' ' init_repos && @@ -514,14 +542,25 @@ test_expect_success 'sparse-index is expanded and converted back' ' test_region index ensure_full_index trace2.txt ' -test_expect_success 'sparse-index is not expanded' ' - init_repos && - +ensure_not_expanded () { rm -f trace2.txt && echo >>sparse-index/untracked.txt && GIT_TRACE2_EVENT="$(pwd)/trace2.txt" GIT_TRACE2_EVENT_NESTING=10 \ - git -C sparse-index status && + git -C sparse-index "$@" && test_region ! index ensure_full_index trace2.txt +} + +test_expect_success 'sparse-index is not expanded' ' + init_repos && + + ensure_not_expanded status && + ensure_not_expanded commit --allow-empty -m empty && + echo >>sparse-index/a && + ensure_not_expanded commit -a -m a && + echo >>sparse-index/a && + ensure_not_expanded commit --include a -m a && + echo >>sparse-index/deep/deeper1/a && + ensure_not_expanded commit --include deep/deeper1/a -m deeper ' # NEEDSWORK: a sparse-checkout behaves differently from a full checkout -- cgit v1.2.3