git-svn: correctly access repos when only given partial read permissions

diff --git a/git-pull.sh b/git-pull.sh
index 29c14e148e1ff5b6f7bc0d8aca705961f0957eb8..e23beb685d15447ac114c58d1795ed15bef88c9d 100755 (executable)
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -8,7 +8,7 @@ USAGE='[-n | --no-summary] [--no-commit] [-s strategy]... [<fetch-options>] <rep
 LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
 . git-sh-setup
 
-strategy_args= no_summary= no_commit=
+strategy_args= no_summary= no_commit= squash=
 while case "$#,$1" in 0) break ;; *,-*) ;; *) break ;; esac
 do
        case "$1" in
@@ -17,12 +17,14 @@ do
                no_summary=-n ;;
        --no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
                no_commit=--no-commit ;;
+       --sq|--squ|--squa|--squas|--squash)
+               squash=--squash ;;
        -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
                --strateg=*|--strategy=*|\
        -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
                case "$#,$1" in
                *,*=*)
-                       strategy=`expr "$1" : '-[^=]*=\(.*\)'` ;;
+                       strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;;
                1,*)
                        usage ;;
                *)
@@ -42,10 +44,10 @@ do
        shift
 done
 
-orig_head=$(git-rev-parse --verify HEAD) || die "Pulling into a black hole?"
-git-fetch --update-head-ok "$@" || exit 1
+orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
+git-fetch --update-head-ok --reflog-action=pull "$@" || exit 1
 
-curr_head=$(git-rev-parse --verify HEAD)
+curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
 if test "$curr_head" != "$orig_head"
 then
        # The fetch involved updating the current branch.
@@ -55,9 +57,17 @@ then
        # First update the working tree to match $curr_head.
 
        echo >&2 "Warning: fetch updated the current branch head."
-       echo >&2 "Warning: fast forwarding your working tree."
+       echo >&2 "Warning: fast forwarding your working tree from"
+       echo >&2 "Warning: commit $orig_head."
+       git-update-index --refresh 2>/dev/null
        git-read-tree -u -m "$orig_head" "$curr_head" ||
-               die "You need to first update your working tree."
+               die 'Cannot fast-forward your working tree.
+After making sure that you saved anything precious from
+$ git diff '$orig_head'
+output, run
+$ git reset --hard
+to recover.'
+
 fi
 
 merge_head=$(sed -e '/ not-for-merge   /d' \
@@ -70,6 +80,11 @@ case "$merge_head" in
        exit 0
        ;;
 ?*' '?*)
+       if test -z "$orig_head"
+       then
+               echo >&2 "Cannot merge multiple branches into empty head"
+               exit 1
+       fi
        var=`git-repo-config --get pull.octopus`
        if test -n "$var"
        then
@@ -85,11 +100,20 @@ case "$merge_head" in
        ;;
 esac
 
+if test -z "$orig_head"
+then
+       git-update-ref -m "initial pull" HEAD $merge_head "" &&
+       git-read-tree --reset -u HEAD || exit 1
+       exit
+fi
+
 case "$strategy_args" in
 '')
        strategy_args=$strategy_default_args
        ;;
 esac
 
-merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD")
-git-merge $no_summary $no_commit $strategy_args "$merge_name" HEAD $merge_head
+merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit
+git-merge "--reflog-action=pull $*" \
+       $no_summary $no_commit $squash $strategy_args \
+       "$merge_name" HEAD $merge_head