git-svn: handle our top-level path being deleted and later re-added

diff --git a/git-merge-octopus.sh b/git-merge-octopus.sh
index 7adffdc7950baaf1da5b36913f78404c48c6d270..645e1147dc886f2b1ca6d2020b44db746b082bf0 100755 (executable)
--- a/git-merge-octopus.sh
+++ b/git-merge-octopus.sh
@@ -45,19 +45,27 @@ esac
 # MRT is the current "merge result tree"
 
 MRC=$head MSG= PARENT="-p $head"
-MRT=$(git-write-tree)
+MRT=$(git write-tree)
 CNT=1 ;# counting our head
 NON_FF_MERGE=0
+OCTOPUS_FAILURE=0
 for SHA1 in $remotes
 do
-       common=$(git-merge-base --all $MRC $SHA1) ||
+       case "$OCTOPUS_FAILURE" in
+       1)
+               # We allow only last one to have a hand-resolvable
+               # conflicts.  Last round failed and we still had
+               # a head to merge.
+               echo "Automated merge did not work."
+               echo "Should not be doing an Octopus."
+               exit 2
+       esac
+
+       common=$(git merge-base --all $MRC $SHA1) ||
                die "Unable to find common commit with $SHA1"
 
-       case "$common" in
-       ?*"$LF"?*)
-               die "Not trivially mergeable."
-               ;;
-       $SHA1)
+       case "$LF$common$LF" in
+       *"$LF$SHA1$LF"*)
                echo "Already up-to-date with $SHA1"
                continue
                ;;
@@ -74,22 +82,22 @@ do
                # We still need to count this as part of the parent set.
 
                echo "Fast forwarding to: $SHA1"
-               git-read-tree -u -m $head $SHA1 || exit
-               MRC=$SHA1 MRT=$(git-write-tree)
+               git read-tree -u -m $head $SHA1 || exit
+               MRC=$SHA1 MRT=$(git write-tree)
                continue
        fi
 
        NON_FF_MERGE=1
 
        echo "Trying simple merge with $SHA1"
-       git-read-tree -u -m $common $MRT $SHA1 || exit 2
-       next=$(git-write-tree 2>/dev/null)
+       git read-tree -u -m --aggressive  $common $MRT $SHA1 || exit 2
+       next=$(git write-tree 2>/dev/null)
        if test $? -ne 0
        then
                echo "Simple merge did not work, trying automatic merge."
                git-merge-index -o git-merge-one-file -a ||
-               exit 2 ; # Automatic merge failed; should not be doing Octopus
-               next=$(git-write-tree 2>/dev/null)
+               OCTOPUS_FAILURE=1
+               next=$(git write-tree 2>/dev/null)
        fi
 
        # We have merged the other branch successfully.  Ideally
@@ -103,4 +111,4 @@ do
        MRT=$next
 done
 
-exit 0
+exit "$OCTOPUS_FAILURE"