feat(db): confirm list of all packages that will be removed

Sometimes it isn't obvious which set of packages are removed from a
split package when the pkgbase matches also a subset of a pkgbase. This
can happen for example with bootstrapping packages, when the intention
is to just remove a partial part of the bootstrap pkgbase.

To make the intention more explicit, list all to be removed packages and
await for confirmation.

Component: pkgctl db remove
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

2 files changed, 49 insertions, 3 deletions

diff --git a/src/lib/util/pacman.sh b/src/lib/util/pacman.sh
index 620e1a8..4637d28 100644
--- a/src/lib/util/pacman.sh
+++ b/src/lib/util/pacman.sh
@@ -18,10 +18,12 @@ readonly _DEVTOOLS_MAKEPKG_CONF_DIR=${_DEVTOOLS_LIBRARY_DIR}/makepkg.conf.d
 
 
 update_pacman_repo_cache() {
+	local repo=${1:-multilib}
+
 	mkdir -p "${_DEVTOOLS_PACMAN_CACHE_DIR}"
 	msg "Updating pacman database cache"
 	lock 10 "${_DEVTOOLS_PACMAN_CACHE_DIR}.lock" "Locking pacman database cache"
-	fakeroot -- pacman --config "${_DEVTOOLS_PACMAN_CONF_DIR}/multilib.conf" \
+	fakeroot -- pacman --config "${_DEVTOOLS_PACMAN_CONF_DIR}/${repo}.conf" \
 		--dbpath "${_DEVTOOLS_PACMAN_CACHE_DIR}" \
 		-Sy
 	lock_close 10
@@ -29,6 +31,7 @@ update_pacman_repo_cache() {
 
 get_pacman_repo_from_pkgbuild() {
 	local path=${1:-PKGBUILD}
+	local repo=${2:-multilib}
 
 	# shellcheck source=contrib/makepkg/PKGBUILD.proto
 	mapfile -t pkgnames < <(source "${path}"; printf "%s\n" "${pkgname[@]}")
@@ -40,12 +43,12 @@ get_pacman_repo_from_pkgbuild() {
 
 	# update the pacman repo cache if it doesn't exist yet
 	if [[ ! -d "${_DEVTOOLS_PACMAN_CACHE_DIR}" ]]; then
-		update_pacman_repo_cache
+		update_pacman_repo_cache "${repo}"
 	fi
 
 	slock 10 "${_DEVTOOLS_PACMAN_CACHE_DIR}.lock" "Locking pacman database cache"
 	# query repo of passed pkgname, specify --nodeps twice to skip all dependency checks
-	mapfile -t repos < <(pacman --config "${_DEVTOOLS_PACMAN_CONF_DIR}/multilib.conf" \
+	mapfile -t repos < <(pacman --config "${_DEVTOOLS_PACMAN_CONF_DIR}/${repo}.conf" \
 		--dbpath "${_DEVTOOLS_PACMAN_CACHE_DIR}" \
 		--sync \
 		--nodeps \
@@ -58,3 +61,30 @@ get_pacman_repo_from_pkgbuild() {
 
 	printf "%s" "${repos[0]}"
 }
+
+get_pkgnames_from_repo_pkgbase() {
+	local repo=$1
+	shift
+	local pkgbases=("$@")
+
+	# update the pacman repo cache if it doesn't exist yet
+	if [[ ! -d "${_DEVTOOLS_PACMAN_CACHE_DIR}" ]]; then
+		update_pacman_repo_cache universe
+	fi
+
+	slock 10 "${_DEVTOOLS_PACMAN_CACHE_DIR}.lock" "Locking pacman database cache"
+	# query pkgnames of passed pkgbase inside a repo
+	mapfile -t pkgnames < <(expac --config <(sed "s|#DBPath.*|DBPath = $(realpath "${_DEVTOOLS_PACMAN_CACHE_DIR}")|" < "${_DEVTOOLS_PACMAN_CONF_DIR}/universe.conf") \
+		--sync '%r %e %n' 2>/dev/null \
+		| sort | awk -v pkgbase="${pkgbases[*]}" \
+			'BEGIN { split(pkgbase, array); for (item in array) filter[array[item]]=1 } $1=="'"${repo}"'" && $2 in filter {print $3}'
+	)
+	lock_close 10
+
+	if (( ! ${#pkgnames[@]} )); then
+		return 1
+	fi
+
+	printf "%s\n" "${pkgnames[@]}"
+	return 0
+}
diff --git a/src/lib/util/term.sh b/src/lib/util/term.sh
index 853dccf..08d044f 100644
--- a/src/lib/util/term.sh
+++ b/src/lib/util/term.sh
@@ -180,3 +180,19 @@ term_spinner_stop() {
 	# show the cursor after stopping the spinner
 	term_cursor_show
 }
+
+prompt() {
+	local message=$1
+	local answer
+
+	read -r -p "${message} (y/N) " answer
+
+	case "${answer}" in
+		y|Y|yes|Yes|YES)
+			true
+			;;
+		*)
+			false
+			;;
+	esac
+}