Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

1 files changed, 101 insertions, 0 deletions

diff --git a/git-parse-remote.sh b/git-parse-remote.sh
new file mode 100644
index 000000000000..d3c39980f3fe
--- /dev/null
+++ b/git-parse-remote.sh
@@ -0,0 +1,101 @@
+# This is a shell library to calculate the remote repository and
+# upstream branch that should be pulled by "git pull" from the current
+# branch.
+
+# git-ls-remote could be called from outside a git managed repository;
+# this would fail in that case and would issue an error message.
+GIT_DIR=$(git rev-parse -q --git-dir) || :;
+
+get_default_remote () {
+	curr_branch=$(git symbolic-ref -q HEAD)
+	curr_branch="${curr_branch#refs/heads/}"
+	origin=$(git config --get "branch.$curr_branch.remote")
+	echo ${origin:-origin}
+}
+
+get_remote_merge_branch () {
+	case "$#" in
+	0|1)
+	    origin="$1"
+	    default=$(get_default_remote)
+	    test -z "$origin" && origin=$default
+	    curr_branch=$(git symbolic-ref -q HEAD) &&
+	    [ "$origin" = "$default" ] &&
+	    echo $(git for-each-ref --format='%(upstream)' $curr_branch)
+	    ;;
+	*)
+	    repo=$1
+	    shift
+	    ref=$1
+	    # FIXME: It should return the tracking branch
+	    #        Currently only works with the default mapping
+	    case "$ref" in
+	    +*)
+		ref=$(expr "z$ref" : 'z+\(.*\)')
+		;;
+	    esac
+	    expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
+	    remote=$(expr "z$ref" : 'z\([^:]*\):')
+	    case "$remote" in
+	    '' | HEAD ) remote=HEAD ;;
+	    heads/*) remote=${remote#heads/} ;;
+	    refs/heads/*) remote=${remote#refs/heads/} ;;
+	    refs/* | tags/* | remotes/* ) remote=
+	    esac
+	    [ -n "$remote" ] && case "$repo" in
+		.)
+		    echo "refs/heads/$remote"
+		    ;;
+		*)
+		    echo "refs/remotes/$repo/$remote"
+		    ;;
+	    esac
+	esac
+}
+
+error_on_missing_default_upstream () {
+	cmd="$1"
+	op_type="$2"
+	op_prep="$3" # FIXME: op_prep is no longer used
+	example="$4"
+	branch_name=$(git symbolic-ref -q HEAD)
+	display_branch_name="${branch_name#refs/heads/}"
+	# If there's only one remote, use that in the suggestion
+	remote="$(gettext "<remote>")"
+	branch="$(gettext "<branch>")"
+	if test $(git remote | wc -l) = 1
+	then
+		remote=$(git remote)
+	fi
+
+	if test -z "$branch_name"
+	then
+		gettextln "You are not currently on a branch."
+	else
+		gettextln "There is no tracking information for the current branch."
+	fi
+	case "$op_type" in
+	rebase)
+		gettextln "Please specify which branch you want to rebase against."
+		;;
+	merge)
+		gettextln "Please specify which branch you want to merge with."
+		;;
+	*)
+		echo >&2 "BUG: unknown operation type: $op_type"
+		exit 1
+		;;
+	esac
+	eval_gettextln "See git-\${cmd}(1) for details."
+	echo
+	echo "    $example"
+	echo
+	if test -n "$branch_name"
+	then
+		gettextln "If you wish to set tracking information for this branch you can do so with:"
+		echo
+		echo "    git branch --set-upstream-to=$remote/$branch $display_branch_name"
+		echo
+	fi
+	exit 1
+}