feat(version): introduce version check subcommand

The version subcommand handles pkgver related commands, the first
subcommand being `check`. Check runs nvchecker if a `.nvchecker.toml`
file exists and compares the current pkgver with the latest release.

Introduces nvchecker as optional dependency which has to be installed in
order to use this particular subcommand.

BREAKING CHANGE: formerly pkgctl version would output the version of the
pkgctl tool, now it is used as a version related subcommand.

Fixes #140

Component: pkgctl version
Component: pkgctl version check
Co-authored-by: Christian Heusel <christian@heusel.eu>

2 files changed, 17 insertions, 2 deletions

diff --git a/contrib/completion/bash/devtools.in b/contrib/completion/bash/devtools.in
index 1fbd46c..f1084ab 100644
--- a/contrib/completion/bash/devtools.in
+++ b/contrib/completion/bash/devtools.in
@@ -337,6 +337,15 @@ _pkgctl_repo_switch_opts() {
 	fi
 }
 
+_pkgctl_version_cmds=(
+	check
+)
+
+_pkgctl_version_check_args=(
+	-h --help
+)
+
+_pkgctl_version_check_opts() { _filedir -d; }
 
 _pkgctl_repo_web_args=(
 	--print
diff --git a/contrib/completion/zsh/_devtools.in b/contrib/completion/zsh/_devtools.in
index 5b51aff..575c327 100644
--- a/contrib/completion/zsh/_devtools.in
+++ b/contrib/completion/zsh/_devtools.in
@@ -277,7 +277,7 @@ _pkgctl_cmds=(
 	"release[Release step to commit, tag and upload build artifacts]"
 	"repo[Manage Git packaging repositories and their configuration]"
 	"search[Search for an expression across the GitLab packaging group]"
-	"version[Show pkgctl version information]"
+	"version[Package version related commands]"
 )
 
 _pkgctl_args=(
@@ -285,8 +285,14 @@ _pkgctl_args=(
 	'(-h --help)'{-h,--help}'[Display usage]'
 )
 
-_pkgctl_version_args=(
+_pkgctl_version_cmds=(
+	"pkgctl version command"
+	"check[Check if there is an new upstream version available]"
+)
+
+_pkgctl_version_check_args=(
 	'(-h --help)'{-h,--help}'[Display usage]'
+	'*:git_dir:_files -/'
 )
 
 _pkgctl_diff_args=("${_diffpkg_args[@]}")