2 files changed, 118 insertions, 1 deletions

diff --git a/src/lib/version.sh b/src/lib/version.sh
index 826b306..14cd810 100644
--- a/src/lib/version.sh
+++ b/src/lib/version.sh
@@ -18,7 +18,8 @@ pkgctl_version_usage() {
 		Package version related commands.
 
 		COMMANDS
-		    check    Check if there is a newer version availble
+		    check      Check if there is a newer version availble
+		    upgrade    Upgrade the PKGBUILD according to the latest available upstream version
 
 		OPTIONS
 		    -h, --help    Show this help text
@@ -48,6 +49,14 @@ pkgctl_version() {
 				pkgctl_version_check "$@"
 				exit 0
 				;;
+			upgrade)
+				_DEVTOOLS_COMMAND+=" $1"
+				shift
+				# shellcheck source=src/lib/version/upgrade.sh
+				source "${_DEVTOOLS_LIBRARY_DIR}"/lib/version/upgrade.sh
+				pkgctl_version_upgrade "$@"
+				exit 0
+				;;
 			*)
 				die "invalid argument: %s" "$1"
 				;;
diff --git a/src/lib/version/upgrade.sh b/src/lib/version/upgrade.sh
new file mode 100644
index 0000000..704431a
--- /dev/null
+++ b/src/lib/version/upgrade.sh
@@ -0,0 +1,108 @@
+#!/bin/bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+[[ -z ${DEVTOOLS_INCLUDE_VERSION_UPGRADE_SH:-} ]] || return 0
+DEVTOOLS_INCLUDE_VERSION_UPGRADE_SH=1
+
+_DEVTOOLS_LIBRARY_DIR=${_DEVTOOLS_LIBRARY_DIR:-@pkgdatadir@}
+# shellcheck source=src/lib/common.sh
+source "${_DEVTOOLS_LIBRARY_DIR}"/lib/common.sh
+# shellcheck source=src/lib/version/check.sh
+source "${_DEVTOOLS_LIBRARY_DIR}"/lib/version/check.sh
+# shellcheck source=src/lib/util/pkgbuild.sh
+source "${_DEVTOOLS_LIBRARY_DIR}"/lib/util/pkgbuild.sh
+
+source /usr/share/makepkg/util/message.sh
+
+set -e
+
+pkgctl_version_upgrade_usage() {
+	local -r COMMAND=${_DEVTOOLS_COMMAND:-${BASH_SOURCE[0]##*/}}
+	cat <<- _EOF_
+		Usage: ${COMMAND} [OPTIONS] [PKGBASE]...
+
+		Upgrade the PKGBUILD according to the latest available upstream version
+
+		Uses nvchecker, a .nvchecker.toml file and the current PKGBUILD
+		pkgver to check if there is a newer package version available.
+
+		The current working directory is used if no PKGBASE is specified.
+
+		OPTIONS
+		    -h, --help          Show this help text
+
+		EXAMPLES
+		    $ ${COMMAND} neovim vim
+_EOF_
+}
+
+pkgctl_version_upgrade() {
+	local path upstream_version result
+	local pkgbases=()
+
+	while (( $# )); do
+		case $1 in
+			-h|--help)
+				pkgctl_version_upgrade_usage
+				exit 0
+				;;
+			--)
+				shift
+				break
+				;;
+			-*)
+				die "invalid argument: %s" "$1"
+				;;
+			*)
+				pkgbases=("$@")
+				break
+				;;
+		esac
+	done
+
+	if ! command -v nvchecker &>/dev/null; then
+		die "The \"$_DEVTOOLS_COMMAND\" command requires 'nvchecker'"
+	fi
+
+	# Check if used without pkgbases in a packaging directory
+	if (( ${#pkgbases[@]} == 0 )); then
+		if [[ -f PKGBUILD ]]; then
+			pkgbases=(".")
+		else
+			pkgctl_version_upgrade_usage
+			exit 1
+		fi
+	fi
+
+	for path in "${pkgbases[@]}"; do
+		pushd "${path}" >/dev/null
+
+		if [[ ! -f "PKGBUILD" ]]; then
+			die "No PKGBUILD found for ${path}"
+		fi
+
+		# reset common PKGBUILD variables
+		unset pkgbase pkgname arch source pkgver pkgrel validpgpkeys
+		# shellcheck source=contrib/makepkg/PKGBUILD.proto
+		. ./PKGBUILD
+		pkgbase=${pkgbase:-$pkgname}
+
+		if ! upstream_version=$(get_upstream_version); then
+			die "Failed to get latest upstream version for %s" "${pkgbase}"
+		fi
+
+		if ! result=$(vercmp "${upstream_version}" "${pkgver}"); then
+			die "Failed to compare version %s against %s" "${upstream_version}" "${pkgver}"
+		fi
+
+		if (( result > 0 )); then
+			msg_success "${BOLD}${pkgbase}${ALL_OFF}: upgrading from version ${PURPLE}${pkgver}${ALL_OFF} to ${DARK_GREEN}${upstream_version}${ALL_OFF}"
+
+			pkgbuild_set_pkgver "${upstream_version}"
+			pkgbuild_set_pkgrel 1
+		fi
+
+		popd >/dev/null
+	done
+}