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author | Jeff King <peff@peff.net> | 2019-07-02 08:16:49 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2019-07-02 20:08:40 +0300 |
commit | b1c36cb84908a31ede05e5a16fbc584c7681cffb (patch) | |
tree | 19359ac8a73db724c996ef2690402bea5210b3b6 /t/test-lib-functions.sh | |
parent | 8dca754b1e874719a732bc9ab7b0e14b21b1bc10 (diff) |
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>
Diffstat (limited to 't/test-lib-functions.sh')
-rw-r--r-- | t/test-lib-functions.sh | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh index 0367cec5fd..6083cf483a 100644 --- a/t/test-lib-functions.sh +++ b/t/test-lib-functions.sh @@ -233,6 +233,129 @@ test_merge () { git tag "$1" } +# Efficiently create <nr> commits, each with a unique number (from 1 to <nr> +# by default) in the commit message. +# +# Usage: test_commit_bulk [options] <nr> +# -C <dir>: +# Run all git commands in directory <dir> +# --ref=<n>: +# ref on which to create commits (default: HEAD) +# --start=<n>: +# number commit messages from <n> (default: 1) +# --message=<msg>: +# use <msg> as the commit mesasge (default: "commit %s") +# --filename=<fn>: +# modify <fn> in each commit (default: %s.t) +# --contents=<string>: +# place <string> in each file (default: "content %s") +# --id=<string>: +# shorthand to use <string> and %s in message, filename, and contents +# +# The message, filename, and contents strings are evaluated by printf, with the +# first "%s" replaced by the current commit number. So you can do: +# +# test_commit_bulk --filename=file --contents="modification %s" +# +# to have every commit touch the same file, but with unique content. +# +test_commit_bulk () { + tmpfile=.bulk-commit.input + indir=. + ref=HEAD + n=1 + message='commit %s' + filename='%s.t' + contents='content %s' + while test $# -gt 0 + do + case "$1" in + -C) + indir=$2 + shift + ;; + --ref=*) + ref=${1#--*=} + ;; + --start=*) + n=${1#--*=} + ;; + --message=*) + message=${1#--*=} + ;; + --filename=*) + filename=${1#--*=} + ;; + --contents=*) + contents=${1#--*=} + ;; + --id=*) + message="${1#--*=} %s" + filename="${1#--*=}-%s.t" + contents="${1#--*=} %s" + ;; + -*) + BUG "invalid test_commit_bulk option: $1" + ;; + *) + break + ;; + esac + shift + done + total=$1 + + add_from= + if git -C "$indir" rev-parse --verify "$ref" + then + add_from=t + fi + + while test "$total" -gt 0 + do + test_tick && + echo "commit $ref" + printf 'author %s <%s> %s\n' \ + "$GIT_AUTHOR_NAME" \ + "$GIT_AUTHOR_EMAIL" \ + "$GIT_AUTHOR_DATE" + printf 'committer %s <%s> %s\n' \ + "$GIT_COMMITTER_NAME" \ + "$GIT_COMMITTER_EMAIL" \ + "$GIT_COMMITTER_DATE" + echo "data <<EOF" + printf "$message\n" $n + echo "EOF" + if test -n "$add_from" + then + echo "from $ref^0" + add_from= + fi + printf "M 644 inline $filename\n" $n + echo "data <<EOF" + printf "$contents\n" $n + echo "EOF" + echo + n=$((n + 1)) + total=$((total - 1)) + done >"$tmpfile" + + git -C "$indir" \ + -c fastimport.unpacklimit=0 \ + fast-import <"$tmpfile" || return 1 + + # This will be left in place on failure, which may aid debugging. + rm -f "$tmpfile" + + # If we updated HEAD, then be nice and update the index and working + # tree, too. + if test "$ref" = "HEAD" + then + git -C "$indir" checkout -f HEAD || return 1 + fi + +} + # This function helps systems where core.filemode=false is set. # Use it instead of plain 'chmod +x' to set or unset the executable bit # of a file in the working directory and add it to the index. |