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Diffstat (limited to 'third_party/git/t/perf/repos/many-files.sh')
| -rwxr-xr-x | third_party/git/t/perf/repos/many-files.sh | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/third_party/git/t/perf/repos/many-files.sh b/third_party/git/t/perf/repos/many-files.sh new file mode 100755 index 000000000000..28720e4e1041 --- /dev/null +++ b/third_party/git/t/perf/repos/many-files.sh @@ -0,0 +1,110 @@ +#!/bin/sh +# Generate test data repository using the given parameters. +# When omitted, we create "gen-many-files-d-w-f.git". +# +# Usage: [-r repo] [-d depth] [-w width] [-f files] +# +# -r repo: path to the new repo to be generated +# -d depth: the depth of sub-directories +# -w width: the number of sub-directories at each level +# -f files: the number of files created in each directory +# +# Note that all files will have the same SHA-1 and each +# directory at a level will have the same SHA-1, so we +# will potentially have a large index, but not a large +# ODB. +# +# Ballast will be created under "ballast/". + +EMPTY_BLOB=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 + +set -e + +# (5, 10, 9) will create 999,999 ballast files. +# (4, 10, 9) will create 99,999 ballast files. +depth=5 +width=10 +files=9 + +while test "$#" -ne 0 +do + case "$1" in + -r) + shift; + test "$#" -ne 0 || { echo 'error: -r requires an argument' >&2; exit 1; } + repo=$1; + shift ;; + -d) + shift; + test "$#" -ne 0 || { echo 'error: -d requires an argument' >&2; exit 1; } + depth=$1; + shift ;; + -w) + shift; + test "$#" -ne 0 || { echo 'error: -w requires an argument' >&2; exit 1; } + width=$1; + shift ;; + -f) + shift; + test "$#" -ne 0 || { echo 'error: -f requires an argument' >&2; exit 1; } + files=$1; + shift ;; + *) + echo "error: unknown option '$1'" >&2; exit 1 ;; + esac +done + +# Inflate the index with thousands of empty files. +# usage: dir depth width files +fill_index() { + awk -v arg_dir=$1 -v arg_depth=$2 -v arg_width=$3 -v arg_files=$4 ' + function make_paths(dir, depth, width, files, f, w) { + for (f = 1; f <= files; f++) { + print dir "/file" f + } + if (depth > 0) { + for (w = 1; w <= width; w++) { + make_paths(dir "/dir" w, depth - 1, width, files) + } + } + } + END { make_paths(arg_dir, arg_depth, arg_width, arg_files) } + ' </dev/null | + sed "s/^/100644 $EMPTY_BLOB /" | + git update-index --index-info + return 0 +} + +[ -z "$repo" ] && repo=gen-many-files-$depth.$width.$files.git + +mkdir $repo +cd $repo +git init . + +# Create an initial commit just to define master. +touch many-files.empty +echo "$depth $width $files" >many-files.params +git add many-files.* +git commit -q -m params + +# Create ballast for p0006 based upon the given params and +# inflate the index with thousands of empty files and commit. +git checkout -b p0006-ballast +fill_index "ballast" $depth $width $files +git commit -q -m "ballast" + +nr_files=$(git ls-files | wc -l) + +# Modify 1 file and commit. +echo "$depth $width $files" >>many-files.params +git add many-files.params +git commit -q -m "ballast plus 1" + +# Checkout master to put repo in canonical state (because +# the perf test may need to clone and enable sparse-checkout +# before attempting to checkout a commit with the ballast +# (because it may contain 100K directories and 1M files)). +git checkout master + +echo "Repository "$repo" ($depth, $width, $files) created. Ballast $nr_files." +exit 0 |