t/perf/repos/inflate-repo.sh

   1 #!/bin/sh
   2 # Inflate the size of an EXISTING repo.
   3 #
   4 # This script should be run inside the worktree of a TEST repo.
   5 # It will use the contents of the current HEAD to generate a
   6 # commit containing copies of the current worktree such that the
   7 # total size of the commit has at least <target_size> files.
   8 #
   9 # Usage: [-t target_size] [-b branch_name]
  10
  11 set -e
  12
  13 target_size=10000
  14 branch_name=p0006-ballast
  15 ballast=ballast
  16
  17 while test "$#" -ne 0
  18 do
  19     case "$1" in
  20         -b)
  21             shift;
  22             test "$#" -ne 0 || { echo 'error: -b requires an argument' >&2; exit 1; }
  23             branch_name=$1;
  24             shift ;;
  25         -t)
  26             shift;
  27             test "$#" -ne 0 || { echo 'error: -t requires an argument' >&2; exit 1; }
  28             target_size=$1;
  29             shift ;;
  30         *)
  31             echo "error: unknown option '$1'" >&2; exit 1 ;;
  32     esac
  33 done
  34
  35 git ls-tree -r HEAD >GEN_src_list
  36 nr_src_files=$(wc -l <GEN_src_list)
  37
  38 src_branch=$(git symbolic-ref --short HEAD)
  39
  40 echo "Branch $src_branch initially has $nr_src_files files."
  41
  42 if test $target_size -le $nr_src_files
  43 then
  44     echo "Repository already exceeds target size $target_size."
  45     rm GEN_src_list
  46     exit 1
  47 fi
  48
  49 # Create well-known branch and add 1 file change to start
  50 # if off before the ballast.
  51 git checkout -b $branch_name HEAD
  52 echo "$target_size" > inflate-repo.params
  53 git add inflate-repo.params
  54 git commit -q -m params
  55
  56 # Create ballast for in our branch.
  57 copy=1
  58 nr_files=$nr_src_files
  59 while test $nr_files -lt $target_size
  60 do
  61     sed -e "s|  |       $ballast/$copy/|" <GEN_src_list |
  62         git update-index --index-info
  63
  64     nr_files=$(expr $nr_files + $nr_src_files)
  65     copy=$(expr $copy + 1)
  66 done
  67 rm GEN_src_list
  68 git commit -q -m "ballast"
  69
  70 # Modify 1 file and commit.
  71 echo "$target_size" >> inflate-repo.params
  72 git add inflate-repo.params
  73 git commit -q -m "ballast plus 1"
  74
  75 nr_files=$(git ls-files | wc -l)
  76
  77 # Checkout master to put repo in canonical state (because
  78 # the perf test may need to clone and enable sparse-checkout
  79 # before attempting to checkout a commit with the ballast
  80 # (because it may contain 100K directories and 1M files)).
  81 git checkout $src_branch
  82
  83 echo "Repository inflated. Branch $branch_name has $nr_files files."
  84
  85 exit 0