diff options
Diffstat (limited to 't')
| -rwxr-xr-x | t/t1700-split-index.sh | 52 | ||||
| -rwxr-xr-x | t/t1701-racy-split-index.sh | 214 |
2 files changed, 245 insertions, 21 deletions
diff --git a/t/t1700-split-index.sh b/t/t1700-split-index.sh index b3b4d83eaf..ae74d2664a 100755 --- a/t/t1700-split-index.sh +++ b/t/t1700-split-index.sh @@ -6,8 +6,18 @@ test_description='split index mode tests' # We need total control of index splitting here sane_unset GIT_TEST_SPLIT_INDEX +# A couple of tests expect the index to have a specific checksum, +# but the presence of the optional FSMN extension would interfere +# with those checks, so disable it in this test script. sane_unset GIT_FSMONITOR_TEST +# Create a file named as $1 with content read from stdin. +# Set the file's mtime to a few seconds in the past to avoid racy situations. +create_non_racy_file () { + cat >"$1" && + test-tool chmtime =-5 "$1" +} + test_expect_success 'enable split index' ' git config splitIndex.maxPercentChange 100 && git update-index --split-index && @@ -31,7 +41,7 @@ test_expect_success 'enable split index' ' ' test_expect_success 'add one file' ' - : >one && + create_non_racy_file one && git update-index --add one && git ls-files --stage >ls-files.actual && cat >ls-files.expect <<-EOF && @@ -83,7 +93,7 @@ test_expect_success 'enable split index again, "one" now belongs to base index"' ' test_expect_success 'modify original file, base index untouched' ' - echo modified >one && + echo modified | create_non_racy_file one && git update-index one && git ls-files --stage >ls-files.actual && cat >ls-files.expect <<-EOF && @@ -102,7 +112,7 @@ test_expect_success 'modify original file, base index untouched' ' ' test_expect_success 'add another file, which stays index' ' - : >two && + create_non_racy_file two && git update-index --add two && git ls-files --stage >ls-files.actual && cat >ls-files.expect <<-EOF && @@ -155,7 +165,7 @@ test_expect_success 'remove file in base index' ' ' test_expect_success 'add original file back' ' - : >one && + create_non_racy_file one && git update-index --add one && git ls-files --stage >ls-files.actual && cat >ls-files.expect <<-EOF && @@ -174,7 +184,7 @@ test_expect_success 'add original file back' ' ' test_expect_success 'add new file' ' - : >two && + create_non_racy_file two && git update-index --add two && git ls-files --stage >actual && cat >expect <<-EOF && @@ -218,7 +228,7 @@ test_expect_success 'rev-parse --shared-index-path' ' test_expect_success 'set core.splitIndex config variable to true' ' git config core.splitIndex true && - : >three && + create_non_racy_file three && git update-index --add three && git ls-files --stage >ls-files.actual && cat >ls-files.expect <<-EOF && @@ -253,9 +263,9 @@ test_expect_success 'set core.splitIndex config variable to false' ' test_cmp expect actual ' -test_expect_success 'set core.splitIndex config variable to true' ' +test_expect_success 'set core.splitIndex config variable back to true' ' git config core.splitIndex true && - : >three && + create_non_racy_file three && git update-index --add three && BASE=$(test-tool dump-split-index .git/index | grep "^base") && test-tool dump-split-index .git/index | sed "/^own/d" >actual && @@ -265,7 +275,7 @@ test_expect_success 'set core.splitIndex config variable to true' ' deletions: EOF test_cmp expect actual && - : >four && + create_non_racy_file four && git update-index --add four && test-tool dump-split-index .git/index | sed "/^own/d" >actual && cat >expect <<-EOF && @@ -279,7 +289,7 @@ test_expect_success 'set core.splitIndex config variable to true' ' test_expect_success 'check behavior with splitIndex.maxPercentChange unset' ' git config --unset splitIndex.maxPercentChange && - : >five && + create_non_racy_file five && git update-index --add five && BASE=$(test-tool dump-split-index .git/index | grep "^base") && test-tool dump-split-index .git/index | sed "/^own/d" >actual && @@ -289,7 +299,7 @@ test_expect_success 'check behavior with splitIndex.maxPercentChange unset' ' deletions: EOF test_cmp expect actual && - : >six && + create_non_racy_file six && git update-index --add six && test-tool dump-split-index .git/index | sed "/^own/d" >actual && cat >expect <<-EOF && @@ -303,7 +313,7 @@ test_expect_success 'check behavior with splitIndex.maxPercentChange unset' ' test_expect_success 'check splitIndex.maxPercentChange set to 0' ' git config splitIndex.maxPercentChange 0 && - : >seven && + create_non_racy_file seven && git update-index --add seven && BASE=$(test-tool dump-split-index .git/index | grep "^base") && test-tool dump-split-index .git/index | sed "/^own/d" >actual && @@ -313,7 +323,7 @@ test_expect_success 'check splitIndex.maxPercentChange set to 0' ' deletions: EOF test_cmp expect actual && - : >eight && + create_non_racy_file eight && git update-index --add eight && BASE=$(test-tool dump-split-index .git/index | grep "^base") && test-tool dump-split-index .git/index | sed "/^own/d" >actual && @@ -326,17 +336,17 @@ test_expect_success 'check splitIndex.maxPercentChange set to 0' ' ' test_expect_success 'shared index files expire after 2 weeks by default' ' - : >ten && + create_non_racy_file ten && git update-index --add ten && test $(ls .git/sharedindex.* | wc -l) -gt 2 && just_under_2_weeks_ago=$((5-14*86400)) && test-tool chmtime =$just_under_2_weeks_ago .git/sharedindex.* && - : >eleven && + create_non_racy_file eleven && git update-index --add eleven && test $(ls .git/sharedindex.* | wc -l) -gt 2 && just_over_2_weeks_ago=$((-1-14*86400)) && test-tool chmtime =$just_over_2_weeks_ago .git/sharedindex.* && - : >twelve && + create_non_racy_file twelve && git update-index --add twelve && test $(ls .git/sharedindex.* | wc -l) -le 2 ' @@ -344,12 +354,12 @@ test_expect_success 'shared index files expire after 2 weeks by default' ' test_expect_success 'check splitIndex.sharedIndexExpire set to 16 days' ' git config splitIndex.sharedIndexExpire "16.days.ago" && test-tool chmtime =$just_over_2_weeks_ago .git/sharedindex.* && - : >thirteen && + create_non_racy_file thirteen && git update-index --add thirteen && test $(ls .git/sharedindex.* | wc -l) -gt 2 && just_over_16_days_ago=$((-1-16*86400)) && test-tool chmtime =$just_over_16_days_ago .git/sharedindex.* && - : >fourteen && + create_non_racy_file fourteen && git update-index --add fourteen && test $(ls .git/sharedindex.* | wc -l) -le 2 ' @@ -358,13 +368,13 @@ test_expect_success 'check splitIndex.sharedIndexExpire set to "never" and "now" git config splitIndex.sharedIndexExpire never && just_10_years_ago=$((-365*10*86400)) && test-tool chmtime =$just_10_years_ago .git/sharedindex.* && - : >fifteen && + create_non_racy_file fifteen && git update-index --add fifteen && test $(ls .git/sharedindex.* | wc -l) -gt 2 && git config splitIndex.sharedIndexExpire now && just_1_second_ago=-1 && test-tool chmtime =$just_1_second_ago .git/sharedindex.* && - : >sixteen && + create_non_racy_file sixteen && git update-index --add sixteen && test $(ls .git/sharedindex.* | wc -l) -le 2 ' @@ -379,7 +389,7 @@ do # Create one new shared index file git config core.sharedrepository "$mode" && git config core.splitIndex true && - : >one && + create_non_racy_file one && git update-index --add one && echo "$modebits" >expect && test_modebits .git/index >actual && diff --git a/t/t1701-racy-split-index.sh b/t/t1701-racy-split-index.sh new file mode 100755 index 0000000000..5dc221ef38 --- /dev/null +++ b/t/t1701-racy-split-index.sh @@ -0,0 +1,214 @@ +#!/bin/sh + +# This test can give false success if your machine is sufficiently +# slow or all trials happened to happen on second boundaries. + +test_description='racy split index' + +. ./test-lib.sh + +test_expect_success 'setup' ' + # Only split the index when the test explicitly says so. + sane_unset GIT_TEST_SPLIT_INDEX && + git config splitIndex.maxPercentChange 100 && + + echo "cached content" >racy-file && + git add racy-file && + git commit -m initial && + + echo something >other-file && + # No raciness with this file. + test-tool chmtime =-20 other-file && + + echo "+cached content" >expect +' + +check_cached_diff () { + git diff-index --patch --cached $EMPTY_TREE racy-file >diff && + tail -1 diff >actual && + test_cmp expect actual +} + +trials="0 1 2 3 4" +for trial in $trials +do + test_expect_success "split the index while adding a racily clean file #$trial" ' + rm -f .git/index .git/sharedindex.* && + + # The next three commands must be run within the same + # second (so both writes to racy-file result in the same + # mtime) to create the interesting racy situation. + echo "cached content" >racy-file && + + # Update and split the index. The cache entry of + # racy-file will be stored only in the shared index. + git update-index --split-index --add racy-file && + + # File size must stay the same. + echo "dirty worktree" >racy-file && + + # Subsequent git commands should notice that racy-file + # and the split index have the same mtime, and check + # the content of the file to see if it is actually + # clean. + check_cached_diff + ' +done + +for trial in $trials +do + test_expect_success "add a racily clean file to an already split index #$trial" ' + rm -f .git/index .git/sharedindex.* && + + git update-index --split-index && + + # The next three commands must be run within the same + # second. + echo "cached content" >racy-file && + + # Update the split index. The cache entry of racy-file + # will be stored only in the split index. + git update-index --add racy-file && + + # File size must stay the same. + echo "dirty worktree" >racy-file && + + # Subsequent git commands should notice that racy-file + # and the split index have the same mtime, and check + # the content of the file to see if it is actually + # clean. + check_cached_diff + ' +done + +for trial in $trials +do + test_expect_success "split the index when the index contains a racily clean cache entry #$trial" ' + rm -f .git/index .git/sharedindex.* && + + # The next three commands must be run within the same + # second. + echo "cached content" >racy-file && + + git update-index --add racy-file && + + # File size must stay the same. + echo "dirty worktree" >racy-file && + + # Now wait a bit to ensure that the split index written + # below will get a more recent mtime than racy-file. + sleep 1 && + + # Update and split the index when the index contains + # the racily clean cache entry of racy-file. + # A corresponding replacement cache entry with smudged + # stat data should be added to the new split index. + git update-index --split-index --add other-file && + + # Subsequent git commands should notice the smudged + # stat data in the replacement cache entry and that it + # doesnt match with the file the worktree. + check_cached_diff + ' +done + +for trial in $trials +do + test_expect_success "update the split index when it contains a new racily clean cache entry #$trial" ' + rm -f .git/index .git/sharedindex.* && + + git update-index --split-index && + + # The next three commands must be run within the same + # second. + echo "cached content" >racy-file && + + # Update the split index. The cache entry of racy-file + # will be stored only in the split index. + git update-index --add racy-file && + + # File size must stay the same. + echo "dirty worktree" >racy-file && + + # Now wait a bit to ensure that the split index written + # below will get a more recent mtime than racy-file. + sleep 1 && + + # Update the split index when the racily clean cache + # entry of racy-file is only stored in the split index. + # An updated cache entry with smudged stat data should + # be added to the new split index. + git update-index --add other-file && + + # Subsequent git commands should notice the smudged + # stat data. + check_cached_diff + ' +done + +for trial in $trials +do + test_expect_success "update the split index when a racily clean cache entry is stored only in the shared index #$trial" ' + rm -f .git/index .git/sharedindex.* && + + # The next three commands must be run within the same + # second. + echo "cached content" >racy-file && + + # Update and split the index. The cache entry of + # racy-file will be stored only in the shared index. + git update-index --split-index --add racy-file && + + # File size must stay the same. + echo "dirty worktree" >racy-file && + + # Now wait a bit to ensure that the split index written + # below will get a more recent mtime than racy-file. + sleep 1 && + + # Update the split index when the racily clean cache + # entry of racy-file is only stored in the shared index. + # A corresponding replacement cache entry with smudged + # stat data should be added to the new split index. + git update-index --add other-file && + + # Subsequent git commands should notice the smudged + # stat data. + check_cached_diff + ' +done + +for trial in $trials +do + test_expect_success "update the split index after unpack trees() copied a racily clean cache entry from the shared index #$trial" ' + rm -f .git/index .git/sharedindex.* && + + # The next three commands must be run within the same + # second. + echo "cached content" >racy-file && + + # Update and split the index. The cache entry of + # racy-file will be stored only in the shared index. + git update-index --split-index --add racy-file && + + # File size must stay the same. + echo "dirty worktree" >racy-file && + + # Now wait a bit to ensure that the split index written + # below will get a more recent mtime than racy-file. + sleep 1 && + + # Update the split index after unpack_trees() copied the + # racily clean cache entry of racy-file from the shared + # index. A corresponding replacement cache entry + # with smudged stat data should be added to the new + # split index. + git read-tree -m HEAD && + + # Subsequent git commands should notice the smudged + # stat data. + check_cached_diff + ' +done + +test_done |