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Add git-subtree-check.sh script

pull/1/head
Pieter Wuille 7 years ago
parent
commit
5ff94c630e
  1. 13
      contrib/devtools/README.md
  2. 74
      contrib/devtools/git-subtree-check.sh

13
contrib/devtools/README.md

@ -81,3 +81,16 @@ It will do the following automatically: @@ -81,3 +81,16 @@ It will do the following automatically:
See doc/translation-process.md for more information.
git-subtree-check.sh
====================
Run this script from the root of the repository to verify that a subtree matches the contents of
the commit it claims to have been updated to.
To use, make sure that you have fetched the upstream repository branch in which the subtree is
maintained:
* for src/secp256k1: https://github.com/bitcoin/secp256k1.git (branch master)
* for sec/leveldb: https://github.com/bitcoin/leveldb.git (branch bitcoin-fork)
Usage: git-subtree-check.sh DIR COMMIT
COMMIT may be omitted, in which case HEAD is used.

74
contrib/devtools/git-subtree-check.sh

@ -0,0 +1,74 @@ @@ -0,0 +1,74 @@
#!/bin/sh
DIR="$1"
COMMIT="$2"
if [ -z "$COMMIT" ]; then
COMMIT=HEAD
fi
# Taken from git-subtree (Copyright (C) 2009 Avery Pennarun <apenwarr@gmail.com>)
find_latest_squash()
{
dir="$1"
sq=
main=
sub=
git log --grep="^git-subtree-dir: $dir/*\$" \
--pretty=format:'START %H%n%s%n%n%b%nEND%n' "$COMMIT" |
while read a b junk; do
case "$a" in
START) sq="$b" ;;
git-subtree-mainline:) main="$b" ;;
git-subtree-split:) sub="$b" ;;
END)
if [ -n "$sub" ]; then
if [ -n "$main" ]; then
# a rejoin commit?
# Pretend its sub was a squash.
sq="$sub"
fi
echo "$sq" "$sub"
break
fi
sq=
main=
sub=
;;
esac
done
}
latest_squash="$(find_latest_squash "$DIR")"
if [ -z "$latest_squash" ]; then
echo "ERROR: $DIR is not a subtree" >&2
exit 2
fi
set $latest_squash
old=$1
rev=$2
if [ "d$(git cat-file -t $rev 2>/dev/null)" != dcommit ]; then
echo "ERROR: subtree commit $rev unavailable. Fetch/update the subtree repository" >&2
exit 2
fi
tree_subtree=$(git show -s --format="%T" $rev)
echo "$DIR in $COMMIT was last updated to upstream commit $rev (tree $tree_subtree)"
tree_actual=$(git ls-tree -d "$COMMIT" "$DIR" | head -n 1)
if [ -z "$tree_actual" ]; then
echo "FAIL: subtree directory $DIR not found in $COMMIT" >&2
exit 1
fi
set $tree_actual
tree_actual_type=$2
tree_actual_tree=$3
echo "$DIR in $COMMIT currently refers to $tree_actual_type $tree_actual_tree"
if [ "d$tree_actual_type" != "dtree" ]; then
echo "FAIL: subtree directory $DIR is not a tree in $COMMIT" >&2
exit 1
fi
if [ "$tree_actual_tree" != "$tree_subtree" ]; then
git diff-tree $tree_actual_tree $tree_subtree >&2
echo "FAIL: subtree directory tree doesn't match subtree commit tree" >&2
exit 1
fi
echo "GOOD"
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