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#!/bin/bash
# Initializes or updates the bare repository in the subgit container.
usage() {
die $(cat <<-EOF
Usage: subgit init [-r] [-f] [-u] [PATH..]
Initializes or updates subrepositories by cloning bare repos into
.subgit/ and symlinking working directories. Fetches and resets to
the tracked commit/branch from .subgitrc.
-r Recursively initialize nested subgit repos
-f Force reset working trees (discards local changes)
-u Update .subgitrc with current commit after init
EOF
)
}
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
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