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-rwxr-xr-xt/t6500-gc.sh363
1 files changed, 363 insertions, 0 deletions
diff --git a/t/t6500-gc.sh b/t/t6500-gc.sh
new file mode 100755
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@@ -0,0 +1,363 @@
+#!/bin/sh
+
+test_description='basic git gc tests
+'
+
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-terminal.sh
+
+test_expect_success 'setup' '
+ # do not let the amount of physical memory affects gc
+ # behavior, make sure we always pack everything to one pack by
+ # default
+ git config gc.bigPackThreshold 2g &&
+
+ # These are simply values which, when hashed as a blob with a newline,
+ # produce a hash where the first byte is 0x17 in their respective
+ # algorithms.
+ test_oid_cache <<-EOF
+ obj1 sha1:263
+ obj1 sha256:34
+
+ obj2 sha1:410
+ obj2 sha256:174
+
+ obj3 sha1:523
+ obj3 sha256:313
+
+ obj4 sha1:790
+ obj4 sha256:481
+ EOF
+'
+
+test_expect_success 'gc empty repository' '
+ git gc
+'
+
+test_expect_success 'gc does not leave behind pid file' '
+ git gc &&
+ test_path_is_missing .git/gc.pid
+'
+
+test_expect_success 'gc --gobbledegook' '
+ test_expect_code 129 git gc --nonsense 2>err &&
+ test_i18ngrep "[Uu]sage: git gc" err
+'
+
+test_expect_success 'gc -h with invalid configuration' '
+ mkdir broken &&
+ (
+ cd broken &&
+ git init &&
+ echo "[gc] pruneexpire = CORRUPT" >>.git/config &&
+ test_expect_code 129 git gc -h >usage 2>&1
+ ) &&
+ test_i18ngrep "[Uu]sage" broken/usage
+'
+
+test_expect_success 'gc is not aborted due to a stale symref' '
+ git init remote &&
+ (
+ cd remote &&
+ test_commit initial &&
+ git clone . ../client &&
+ git branch -m develop &&
+ cd ../client &&
+ git fetch --prune &&
+ git gc
+ )
+'
+
+test_expect_success 'gc --keep-largest-pack' '
+ test_create_repo keep-pack &&
+ (
+ cd keep-pack &&
+ test_commit one &&
+ test_commit two &&
+ test_commit three &&
+ git gc &&
+ ( cd .git/objects/pack && ls *.pack ) >pack-list &&
+ test_line_count = 1 pack-list &&
+ cp pack-list base-pack-list &&
+ test_commit four &&
+ git repack -d &&
+ test_commit five &&
+ git repack -d &&
+ ( cd .git/objects/pack && ls *.pack ) >pack-list &&
+ test_line_count = 3 pack-list &&
+ git gc --keep-largest-pack &&
+ ( cd .git/objects/pack && ls *.pack ) >pack-list &&
+ test_line_count = 2 pack-list &&
+ awk "/^P /{print \$2}" <.git/objects/info/packs >pack-info &&
+ test_line_count = 2 pack-info &&
+ test_path_is_file .git/objects/pack/$(cat base-pack-list) &&
+ git fsck
+ )
+'
+
+test_expect_success 'pre-auto-gc hook can stop auto gc' '
+ cat >err.expect <<-\EOF &&
+ no gc for you
+ EOF
+
+ git init pre-auto-gc-hook &&
+ test_hook -C pre-auto-gc-hook pre-auto-gc <<-\EOF &&
+ echo >&2 no gc for you &&
+ exit 1
+ EOF
+ (
+ cd pre-auto-gc-hook &&
+
+ git config gc.auto 3 &&
+ git config gc.autoDetach false &&
+
+ # We need to create two object whose sha1s start with 17
+ # since this is what git gc counts. As it happens, these
+ # two blobs will do so.
+ test_commit "$(test_oid obj1)" &&
+ test_commit "$(test_oid obj2)" &&
+
+ git gc --auto >../out.actual 2>../err.actual
+ ) &&
+ test_must_be_empty out.actual &&
+ test_cmp err.expect err.actual &&
+
+ cat >err.expect <<-\EOF &&
+ will gc for you
+ Auto packing the repository for optimum performance.
+ See "git help gc" for manual housekeeping.
+ EOF
+
+ test_hook -C pre-auto-gc-hook --clobber pre-auto-gc <<-\EOF &&
+ echo >&2 will gc for you &&
+ exit 0
+ EOF
+
+ git -C pre-auto-gc-hook gc --auto >out.actual 2>err.actual &&
+
+ test_must_be_empty out.actual &&
+ test_cmp err.expect err.actual
+'
+
+test_expect_success 'auto gc with too many loose objects does not attempt to create bitmaps' '
+ test_config gc.auto 3 &&
+ test_config gc.autodetach false &&
+ test_config pack.writebitmaps true &&
+ # We need to create two object whose sha1s start with 17
+ # since this is what git gc counts. As it happens, these
+ # two blobs will do so.
+ test_commit "$(test_oid obj1)" &&
+ test_commit "$(test_oid obj2)" &&
+ # Our first gc will create a pack; our second will create a second pack
+ git gc --auto &&
+ ls .git/objects/pack/pack-*.pack | sort >existing_packs &&
+ test_commit "$(test_oid obj3)" &&
+ test_commit "$(test_oid obj4)" &&
+
+ git gc --auto 2>err &&
+ test_i18ngrep ! "^warning:" err &&
+ ls .git/objects/pack/pack-*.pack | sort >post_packs &&
+ comm -1 -3 existing_packs post_packs >new &&
+ comm -2 -3 existing_packs post_packs >del &&
+ test_line_count = 0 del && # No packs are deleted
+ test_line_count = 1 new # There is one new pack
+'
+
+test_expect_success 'gc --no-quiet' '
+ GIT_PROGRESS_DELAY=0 git -c gc.writeCommitGraph=true gc --no-quiet >stdout 2>stderr &&
+ test_must_be_empty stdout &&
+ test_i18ngrep "Computing commit graph generation numbers" stderr
+'
+
+test_expect_success TTY 'with TTY: gc --no-quiet' '
+ test_terminal env GIT_PROGRESS_DELAY=0 \
+ git -c gc.writeCommitGraph=true gc --no-quiet >stdout 2>stderr &&
+ test_must_be_empty stdout &&
+ test_i18ngrep "Enumerating objects" stderr &&
+ test_i18ngrep "Computing commit graph generation numbers" stderr
+'
+
+test_expect_success 'gc --quiet' '
+ git -c gc.writeCommitGraph=true gc --quiet >stdout 2>stderr &&
+ test_must_be_empty stdout &&
+ test_must_be_empty stderr
+'
+
+test_expect_success 'gc.reflogExpire{Unreachable,}=never skips "expire" via "gc"' '
+ test_config gc.reflogExpire never &&
+ test_config gc.reflogExpireUnreachable never &&
+
+ GIT_TRACE=$(pwd)/trace.out git gc &&
+
+ # Check that git-pack-refs is run as a sanity check (done via
+ # gc_before_repack()) but that git-expire is not.
+ grep -E "^trace: (built-in|exec|run_command): git pack-refs --" trace.out &&
+ ! grep -E "^trace: (built-in|exec|run_command): git reflog expire --" trace.out
+'
+
+test_expect_success 'one of gc.reflogExpire{Unreachable,}=never does not skip "expire" via "gc"' '
+ >trace.out &&
+ test_config gc.reflogExpire never &&
+ GIT_TRACE=$(pwd)/trace.out git gc &&
+ grep -E "^trace: (built-in|exec|run_command): git reflog expire --" trace.out
+'
+
+prepare_cruft_history () {
+ test_commit base &&
+
+ test_commit --no-tag foo &&
+ test_commit --no-tag bar &&
+ git reset HEAD^^
+}
+
+assert_cruft_packs () {
+ find .git/objects/pack -name "*.mtimes" >mtimes &&
+ sed -e 's/\.mtimes$/\.pack/g' mtimes >packs &&
+
+ test_file_not_empty packs &&
+ while read pack
+ do
+ test_path_is_file "$pack" || return 1
+ done <packs
+}
+
+assert_no_cruft_packs () {
+ find .git/objects/pack -name "*.mtimes" >mtimes &&
+ test_must_be_empty mtimes
+}
+
+test_expect_success 'gc --cruft generates a cruft pack' '
+ test_when_finished "rm -fr crufts" &&
+ git init crufts &&
+ (
+ cd crufts &&
+
+ prepare_cruft_history &&
+ git gc --cruft &&
+ assert_cruft_packs
+ )
+'
+
+test_expect_success 'gc.cruftPacks=true generates a cruft pack' '
+ test_when_finished "rm -fr crufts" &&
+ git init crufts &&
+ (
+ cd crufts &&
+
+ prepare_cruft_history &&
+ git -c gc.cruftPacks=true gc &&
+ assert_cruft_packs
+ )
+'
+
+test_expect_success 'feature.experimental=true generates a cruft pack' '
+ git init crufts &&
+ test_when_finished "rm -fr crufts" &&
+ (
+ cd crufts &&
+
+ prepare_cruft_history &&
+ git -c feature.experimental=true gc &&
+ assert_cruft_packs
+ )
+'
+
+test_expect_success 'feature.experimental=false allows explicit cruft packs' '
+ git init crufts &&
+ test_when_finished "rm -fr crufts" &&
+ (
+ cd crufts &&
+
+ prepare_cruft_history &&
+ git -c gc.cruftPacks=true -c feature.experimental=false gc &&
+ assert_cruft_packs
+ )
+'
+
+test_expect_success 'feature.experimental=true can be overridden' '
+ git init crufts &&
+ test_when_finished "rm -fr crufts" &&
+ (
+ cd crufts &&
+
+ prepare_cruft_history &&
+ git -c feature.expiremental=true -c gc.cruftPacks=false gc &&
+ assert_no_cruft_packs
+ )
+'
+
+test_expect_success 'feature.experimental=false avoids cruft packs by default' '
+ git init crufts &&
+ test_when_finished "rm -fr crufts" &&
+ (
+ cd crufts &&
+
+ prepare_cruft_history &&
+ git -c feature.experimental=false gc &&
+ assert_no_cruft_packs
+ )
+'
+
+run_and_wait_for_auto_gc () {
+ # We read stdout from gc for the side effect of waiting until the
+ # background gc process exits, closing its fd 9. Furthermore, the
+ # variable assignment from a command substitution preserves the
+ # exit status of the main gc process.
+ # Note: this fd trickery doesn't work on Windows, but there is no
+ # need to, because on Win the auto gc always runs in the foreground.
+ doesnt_matter=$(git gc --auto 9>&1)
+}
+
+test_expect_success 'background auto gc does not run if gc.log is present and recent but does if it is old' '
+ test_commit foo &&
+ test_commit bar &&
+ git repack &&
+ test_config gc.autopacklimit 1 &&
+ test_config gc.autodetach true &&
+ echo fleem >.git/gc.log &&
+ git gc --auto 2>err &&
+ test_i18ngrep "^warning:" err &&
+ test_config gc.logexpiry 5.days &&
+ test-tool chmtime =-345600 .git/gc.log &&
+ git gc --auto &&
+ test_config gc.logexpiry 2.days &&
+ run_and_wait_for_auto_gc &&
+ ls .git/objects/pack/pack-*.pack >packs &&
+ test_line_count = 1 packs
+'
+
+test_expect_success 'background auto gc respects lock for all operations' '
+ # make sure we run a background auto-gc
+ test_commit make-pack &&
+ git repack &&
+ test_config gc.autopacklimit 1 &&
+ test_config gc.autodetach true &&
+
+ # create a ref whose loose presence we can use to detect a pack-refs run
+ git update-ref refs/heads/should-be-loose HEAD &&
+ (ls -1 .git/refs/heads .git/reftable >expect || true) &&
+
+ # now fake a concurrent gc that holds the lock; we can use our
+ # shell pid so that it looks valid.
+ hostname=$(hostname || echo unknown) &&
+ shell_pid=$$ &&
+ if test_have_prereq MINGW && test -f /proc/$shell_pid/winpid
+ then
+ # In Git for Windows, Bash (actually, the MSYS2 runtime) has a
+ # different idea of PIDs than git.exe (actually Windows). Use
+ # the Windows PID in this case.
+ shell_pid=$(cat /proc/$shell_pid/winpid)
+ fi &&
+ printf "%d %s" "$shell_pid" "$hostname" >.git/gc.pid &&
+
+ # our gc should exit zero without doing anything
+ run_and_wait_for_auto_gc &&
+ (ls -1 .git/refs/heads .git/reftable >actual || true) &&
+ test_cmp expect actual
+'
+
+# DO NOT leave a detached auto gc process running near the end of the
+# test script: it can run long enough in the background to racily
+# interfere with the cleanup in 'test_done'.
+
+test_done