contrib/devtools/git-subtree-check.sh

   1 #!/bin/sh
   2 # Copyright (c) 2015 The Bitcoin Core developers
   3 # Distributed under the MIT software license, see the accompanying
   4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 DIR="$1"
   7 COMMIT="$2"
   8 if [ -z "$COMMIT" ]; then
   9     COMMIT=HEAD
  10 fi
  11
  12 # Taken from git-subtree (Copyright (C) 2009 Avery Pennarun <apenwarr@gmail.com>)
  13 find_latest_squash()
  14 {
  15         dir="$1"
  16         sq=
  17         main=
  18         sub=
  19         git log --grep="^git-subtree-dir: $dir/*\$" \
  20                 --pretty=format:'START %H%n%s%n%n%b%nEND%n' "$COMMIT" |
  21         while read a b _; do
  22                 case "$a" in
  23                         START) sq="$b" ;;
  24                         git-subtree-mainline:) main="$b" ;;
  25                         git-subtree-split:) sub="$b" ;;
  26                         END)
  27                                 if [ -n "$sub" ]; then
  28                                         if [ -n "$main" ]; then
  29                                                 # a rejoin commit?
  30                                                 # Pretend its sub was a squash.
  31                                                 sq="$sub"
  32                                         fi
  33                                         echo "$sq" "$sub"
  34                                         break
  35                                 fi
  36                                 sq=
  37                                 main=
  38                                 sub=
  39                                 ;;
  40                 esac
  41         done
  42 }
  43
  44 latest_squash="$(find_latest_squash "$DIR")"
  45 if [ -z "$latest_squash" ]; then
  46     echo "ERROR: $DIR is not a subtree" >&2
  47     exit 2
  48 fi
  49
  50 set $latest_squash
  51 old=$1
  52 rev=$2
  53 if [ "d$(git cat-file -t $rev 2>/dev/null)" != dcommit ]; then
  54     echo "ERROR: subtree commit $rev unavailable. Fetch/update the subtree repository" >&2
  55     exit 2
  56 fi
  57 tree_subtree=$(git show -s --format="%T" $rev)
  58 echo "$DIR in $COMMIT was last updated to upstream commit $rev (tree $tree_subtree)"
  59 tree_actual=$(git ls-tree -d "$COMMIT" "$DIR" | head -n 1)
  60 if [ -z "$tree_actual" ]; then
  61     echo "FAIL: subtree directory $DIR not found in $COMMIT" >&2
  62     exit 1
  63 fi
  64 set $tree_actual
  65 tree_actual_type=$2
  66 tree_actual_tree=$3
  67 echo "$DIR in $COMMIT currently refers to $tree_actual_type $tree_actual_tree"
  68 if [ "d$tree_actual_type" != "dtree" ]; then
  69     echo "FAIL: subtree directory $DIR is not a tree in $COMMIT" >&2
  70     exit 1
  71 fi
  72 if [ "$tree_actual_tree" != "$tree_subtree" ]; then
  73     git diff-tree $tree_actual_tree $tree_subtree >&2
  74     echo "FAIL: subtree directory tree doesn't match subtree commit tree" >&2
  75     exit 1
  76 fi
  77 echo "GOOD"