[PATCH] Update git-tag-script to create the .git/refs/tags if it does not already...

[git.git] / git-merge-one-file-script

diff --git a/git-merge-one-file-script b/git-merge-one-file-script
index b2adc5f..9802f67 100755 (executable)
--- a/git-merge-one-file-script
+++ b/git-merge-one-file-script
@@ -1,60 +1,87 @@
 #!/bin/sh
 #
-# This is the git merge script, called with
+# Copyright (c) Linus Torvalds, 2005
+#
+# This is the git per-file merge script, called with
 #
 #   $1 - original file SHA1 (or empty)
 #   $2 - file in branch1 SHA1 (or empty)
 #   $3 - file in branch2 SHA1 (or empty)
 #   $4 - pathname in repository
-#
+#   $5 - orignal file mode (or empty)
+#   $6 - file in branch1 mode (or empty)
+#   $7 - file in branch2 mode (or empty)
 #
 # Handle some trivial cases.. The _really_ trivial cases have
-# been handled already by read-tree, but that one doesn't
-# do any merges that migth change the tree layout
-#
-
-# if the directory is newly added in a branch, it might not exist
-# in the current tree
-dir=$(dirname "$4")
-mkdir -p "$dir"
+# been handled already by git-read-tree, but that one doesn't
+# do any merges that might change the tree layout.
 
 case "${1:-.}${2:-.}${3:-.}" in
 #
-# deleted in both, or deleted in one and unchanged in the other
+# Deleted in both or deleted in one and unchanged in the other
 #
 "$1.." | "$1.$1" | "$1$1.")
-       rm -f -- "$4"
-       update-cache --remove -- "$4"
-       exit 0
+       echo "Removing $4"
+       if test -f "$4"
+       then
+               rm -f -- "$4"
+       fi &&
+       exec git-update-cache --remove -- "$4"
+       ;;
+
+#
+# Added in one.
+#
+".$2." | "..$3" )
+       echo "Adding $4"
+       git-update-cache --add --cacheinfo "$6$7" "$2$3" "$4" &&
+               exec git-checkout-cache -u -f -- "$4"
        ;;
 
 #
-# added in one, or added identically in both
+# Added in both (check for same permissions).
 #
-".$2." | "..$3" | ".$2$2")
-       mv $(unpack-file "${2:-$3}") $4
-       update-cache --add -- $4
-       exit 0
+".$3$2")
+       if [ "$6" != "$7" ]; then
+               echo "ERROR: File $4 added identically in both branches,"
+               echo "ERROR: but permissions conflict $6->$7."
+               exit 1
+       fi
+       echo "Adding $4"
+       git-update-cache --add --cacheinfo "$6" "$2" "$4" &&
+               exec git-checkout-cache -u -f -- "$4"
        ;;
 
 #
-# Modified in both, but differently ;(
+# Modified in both, but differently.
 #
 "$1$2$3")
-       echo "Auto-merging $4"
-       orig=$(unpack-file $1)
-       src1=$(unpack-file $2)
-       src2=$(unpack-file $3)
-       merge "$src2" "$orig" "$src1"
-       if [ $? -ne 0 ]; then
-               echo Leaving conflict merge in $src2
+       echo "Auto-merging $4."
+       orig=`git-unpack-file $1`
+       src2=`git-unpack-file $3`
+
+       # We reset the index to the first branch, making
+       # git-diff-file useful
+       git-update-cache --add --cacheinfo "$6" "$2" "$4" 
+               git-checkout-cache -u -f -- "$4" &&
+               merge "$4" "$orig" "$src2"
+       ret=$?
+       rm -f -- "$orig" "$src2"
+
+       if [ "$6" != "$7" ]; then
+               echo "ERROR: Permissions conflict: $5->$6,$7."
+               ret=1
+       fi
+
+       if [ $ret -ne 0 ]; then
+               echo "ERROR: Merge conflict in $4."
                exit 1
        fi
-       cp "$src2" "$4" && update-cache --add -- "$4" && exit 0
+       exec git-update-cache -- "$4"
        ;;
 
 *)
-       echo "Not handling case $1 -> $2 -> $3"
+       echo "ERROR: $4: Not handling case $1 -> $2 -> $3"
        ;;
 esac
 exit 1