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#!/bin/bash
# This script is used to produce git context diffs
# Supplied parameters:
# $1 $2 $3 $4 $5 $6 $7
# path old-file old-hash old-mode new-file new-hash new-mode
# 'path' is the git-tree-relative path of the file being diff'ed
old_hash="$3"
new_hash=$(git hash-object "$5")
# no change?
[ "$old_hash" = "$new_hash" ] && exit 0
[ "$DIFF_OPTS" = "" ] && DIFF_OPTS='-pcd'
echo "diff --git a/$1 b/$1"
echo "new file mode $7"
echo "index ${old_hash:0:7}..${new_hash:0:7}"
diff --label a/"$1" --label b/"$1" $DIFF_OPTS "$2" "$5"
exit 0
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