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test-lib: introduce test_commit_bulk
Some tests need to create a string of commits. Doing this with test_commit is very heavy-weight, as it needs at least one process per commit (and in fact, uses several). For bulk creation, we can do much better by using fast-import, but it's often a pain to generate the input. Let's provide a helper to do so. We'll use t5310 as a guinea pig, as it has three 10-commit loops. Here are hyperfine results before and after: [before] Benchmark #1: ./t5310-pack-bitmaps.sh --root=/var/ram/git-tests Time (mean ± σ): 2.846 s ± 0.305 s [User: 3.042 s, System: 0.919 s] Range (min … max): 2.250 s … 3.210 s 10 runs [after] Benchmark #1: ./t5310-pack-bitmaps.sh --root=/var/ram/git-tests Time (mean ± σ): 2.210 s ± 0.174 s [User: 2.570 s, System: 0.604 s] Range (min … max): 1.999 s … 2.590 s 10 runs So we're over 20% faster, while making the callers slightly shorter. We added a lot more lines in test-lib-function.sh, of course, and the helper is way more featureful than we need here. But my hope is that it will be flexible enough to use in more places. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
Junio C Hamano
parent
8dca754b1e
commit
b1c36cb849
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@ -21,15 +21,9 @@ has_any () {
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}
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test_expect_success 'setup repo with moderate-sized history' '
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for i in $(test_seq 1 10)
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do
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test_commit $i
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done &&
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test_commit_bulk --id=file 10 &&
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git checkout -b other HEAD~5 &&
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for i in $(test_seq 1 10)
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do
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test_commit side-$i
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done &&
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test_commit_bulk --id=side 10 &&
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git checkout master &&
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bitmaptip=$(git rev-parse master) &&
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blob=$(echo tagged-blob | git hash-object -w --stdin) &&
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@ -106,10 +100,7 @@ test_expect_success 'clone from bitmapped repository' '
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'
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test_expect_success 'setup further non-bitmapped commits' '
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for i in $(test_seq 1 10)
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do
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test_commit further-$i
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done
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test_commit_bulk --id=further 10
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'
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rev_list_tests 'partial bitmap'
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@ -233,6 +233,129 @@ test_merge () {
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git tag "$1"
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}
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# Efficiently create <nr> commits, each with a unique number (from 1 to <nr>
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# by default) in the commit message.
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#
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# Usage: test_commit_bulk [options] <nr>
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# -C <dir>:
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# Run all git commands in directory <dir>
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# --ref=<n>:
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# ref on which to create commits (default: HEAD)
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# --start=<n>:
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# number commit messages from <n> (default: 1)
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# --message=<msg>:
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# use <msg> as the commit mesasge (default: "commit %s")
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# --filename=<fn>:
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# modify <fn> in each commit (default: %s.t)
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# --contents=<string>:
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# place <string> in each file (default: "content %s")
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# --id=<string>:
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# shorthand to use <string> and %s in message, filename, and contents
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#
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# The message, filename, and contents strings are evaluated by printf, with the
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# first "%s" replaced by the current commit number. So you can do:
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#
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# test_commit_bulk --filename=file --contents="modification %s"
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#
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# to have every commit touch the same file, but with unique content.
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#
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test_commit_bulk () {
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tmpfile=.bulk-commit.input
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indir=.
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ref=HEAD
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n=1
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message='commit %s'
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filename='%s.t'
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contents='content %s'
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while test $# -gt 0
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do
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case "$1" in
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-C)
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indir=$2
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shift
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;;
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--ref=*)
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ref=${1#--*=}
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;;
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--start=*)
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n=${1#--*=}
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;;
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--message=*)
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message=${1#--*=}
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;;
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--filename=*)
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filename=${1#--*=}
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;;
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--contents=*)
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contents=${1#--*=}
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;;
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--id=*)
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message="${1#--*=} %s"
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filename="${1#--*=}-%s.t"
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contents="${1#--*=} %s"
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;;
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-*)
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BUG "invalid test_commit_bulk option: $1"
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;;
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*)
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break
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;;
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esac
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shift
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done
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total=$1
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add_from=
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if git -C "$indir" rev-parse --verify "$ref"
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then
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add_from=t
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fi
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while test "$total" -gt 0
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do
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test_tick &&
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echo "commit $ref"
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printf 'author %s <%s> %s\n' \
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"$GIT_AUTHOR_NAME" \
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"$GIT_AUTHOR_EMAIL" \
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"$GIT_AUTHOR_DATE"
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printf 'committer %s <%s> %s\n' \
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"$GIT_COMMITTER_NAME" \
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"$GIT_COMMITTER_EMAIL" \
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"$GIT_COMMITTER_DATE"
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echo "data <<EOF"
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printf "$message\n" $n
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echo "EOF"
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if test -n "$add_from"
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then
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echo "from $ref^0"
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add_from=
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fi
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printf "M 644 inline $filename\n" $n
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echo "data <<EOF"
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printf "$contents\n" $n
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echo "EOF"
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echo
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n=$((n + 1))
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total=$((total - 1))
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done >"$tmpfile"
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git -C "$indir" \
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-c fastimport.unpacklimit=0 \
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fast-import <"$tmpfile" || return 1
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# This will be left in place on failure, which may aid debugging.
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rm -f "$tmpfile"
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# If we updated HEAD, then be nice and update the index and working
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# tree, too.
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if test "$ref" = "HEAD"
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then
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git -C "$indir" checkout -f HEAD || return 1
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fi
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}
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# This function helps systems where core.filemode=false is set.
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# Use it instead of plain 'chmod +x' to set or unset the executable bit
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# of a file in the working directory and add it to the index.
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