git-context-diff

   1 #!/usr/bin/env bash
   2
   3 # This script is used to produce git context diffs
   4
   5 # Supplied parameters:
   6 # $1   $2       $3       $4       $5       $6       $7
   7 # path old-file old-hash old-mode new-file new-hash new-mode
   8 # 'path' is the git-tree-relative path of the file being diff'ed
   9
  10 old_hash="$3"
  11 new_hash=$(git hash-object "$5")
  12
  13 # no change?
  14 [ "$old_hash" = "$new_hash" ] && exit 0
  15
  16 [ "$DIFF_OPTS" = "" ] && DIFF_OPTS='-pcd'
  17
  18 echo "diff --git a/$1 b/$1"
  19 echo "new file mode $7"
  20 echo "index ${old_hash:0:7}..${new_hash:0:7}"
  21
  22 diff --label a/"$1" --label b/"$1" $DIFF_OPTS "$2" "$5"
  23
  24 exit 0