Add untested rewrite

1 files changed, 88 insertions, 0 deletions

diff --git a/src/subgit-init b/src/subgit-init
new file mode 100755
index 0000000..3299f76
--- /dev/null
+++ b/src/subgit-init
@@ -0,0 +1,88 @@
+#!/bin/bash
+
+# Initializes or updates the bare repository in the subgit container.
+
+usage() { die "Usage: subgit [init|pull] [-r] [PATH..]"; }
+
+recursive=
+force=
+update=
+do_source=1
+while [ "$1" ]; do
+	case $1 in
+	-h) usage;;
+	-r) recursive=-r; shift;;
+	-u) update=-u; shift;;
+	-f) force=-f; shift;;
+	-S) do_source=0; shift;;
+	--) shift; break;;
+	-*) die "Invalid option $1";;
+	*) break;;
+	esac
+done
+
+if [ $do_source -eq 1 ]; then
+	root=$(subgit-source root .)
+	source "$root/.subgitrc"
+fi
+
+readarray -t subrepos < <(subgit-sub subrepo "$@")
+
+for subrepo in "${subrepos[@]}"; do
+	echo "$subrepo"
+
+	root=$(subgit-sub parent "$subrepo")
+	relpath=$(realpath -m --relative-to="$root" "$subrepo")
+
+	bare="$root/.subgit/$relpath"
+	workdir="$root/$relpath"
+	test "$workdir" = "$subrepo"
+
+	[ ! -d "$workdir" ] && mkdir -p "$workdir"
+
+	clone=0
+	commit=${subgitinfo[$relpath/commit]:-HEAD}
+	branch=${subgitinfo[$relpath/branch]}
+	if [ ! -d "$bare" ]; then
+		clone=1
+		mkdir -p "$(dirname "$bare")"
+		clone_args=()
+		[ ! -z "$branch" ] && clone_args+=(-b "$branch")
+		subgit-sub clone "${clone_args[@]}" \
+			"${subgitinfo[$relpath/remote]}" "$bare"
+	fi
+
+	link_relpath=$(realpath --relative-to="$workdir" "$bare")
+	ln -sf "$link_relpath" -T "$workdir/.git"
+
+	if [ ! -z "$branch" ]; then
+		fetch_spec=(origin "$branch")
+	else
+		fetch_spec=(-a)
+	fi
+
+	if ! git -C "$workdir" cat-file -e "$commit" 2>/dev/null; then
+		git -C "$workdir" fetch "${fetch_spec[@]}"
+	fi
+
+	if [ $clone -eq 1 -o ! -z "$force" ]; then
+		git -C "$workdir" reset --hard
+	fi
+
+	if [ ! -z "$branch" ]; then
+		git -C "$workdir" switch "$branch"
+	fi
+
+	git -C "$workdir" reset --soft "$commit"
+done
+
+if [ ! -z "$update" ]; then
+	subgitinfo[$relpath/commit]=$(git -C "$workdir" rev-parse HEAD)
+	subgit-source write
+fi
+
+for subrepo in "${subrepos[@]}"; do
+	if [ ! -z "$recursive" -a -e "$subrepo/.subgitrc" ]; then
+		subgit "${sg_flags[@]}" -C "$subrepo" init $force $recursive $update
+	fi
+done