fix: Reduce verbosity if version file is missing

As we don't check for the existance of the version file this would
otherwise emit a useless error to the commandline:

    > ==> Building protobuf for [extra-staging] (x86_64)
    > cat: /var/lib/archbuild/extra-staging-x86_64/root/.arch-chroot: No such file or directory
    > ==> Creating chroot for [extra-staging] (x86_64)...

Fix this by just silencing the error, as the check later also covers the
case for empty `CURRENT_CHROOT_VERSION`.

Fixes #272

Component: archbuild
Signed-off-by: Christian Heusel <christian@heusel.eu>

doc/man/pkgctl-version.1.asciidoc

@@ -39,14 +39,6 @@ placed in the `$XDG_CONFIG_HOME`/nvchecker` directory. This keyfile is
 used for providing the necessary authentication tokens required for
 accessing the GitHub or GitLab API.
 
-Combiner Source
----------------
-
-To utilize the combiner source, the `pkgbase` section must be declared as the
-combiner source. Additionally, individual sections should be added using a
-quoted table key consisting of the `pkgbase` followed by the stage name,
-separated by double colons. For example: `["sudo:stage1"]`.
-
 Options
 -------
 

src/archbuild.in

@@ -80,7 +80,7 @@ check_root SOURCE_DATE_EPOCH,SRCDEST,SRCPKGDEST,PKGDEST,LOGDEST,MAKEFLAGS,PACKAG
 makechrootpkg_args+=("${@:$OPTIND}")
 
 # Automatically recreate the root chroot if a version mismatch is detected
-CURRENT_CHROOT_VERSION=$(cat "${chroots}/${repo}-${arch}/root/.arch-chroot")
+CURRENT_CHROOT_VERSION=$(cat "${chroots}/${repo}-${arch}/root/.arch-chroot" 2>/dev/null)
 if [[ -f "${chroots}/${repo}-${arch}/root/.arch-chroot" ]] && [[ "$CURRENT_CHROOT_VERSION" != "$CHROOT_VERSION" ]]; then
 	warning "Recreating chroot '%s' (%s) as it is not at version %s" "${chroots}/${repo}-${arch}/root" "$CURRENT_CHROOT_VERSION" "$CHROOT_VERSION"
 	clean_first=true

src/lib/version/check.sh

@@ -304,11 +304,6 @@ get_upstream_version() {
 		return 1
 	fi
 
-	if ! output=$(jq --raw-output --exit-status 'select(.name == "'"${pkgbase}"'")' <<< "${output}"); then
-		printf "failed to select pkgbase result from output"
-		return 1
-	fi
-
 	if ! upstream_version=$(jq --raw-output --exit-status '.version' <<< "${output}"); then
 		printf "failed to select version from result"
 		return 1
@@ -351,7 +346,7 @@ nvchecker_check_config() {
 	fi
 
 	# check if the config contains any section other than pkgbase
-	if [[ -n ${pkgbase} ]] && property=$(grep --max-count=1 --perl-regexp "^\\[(?!\"?${pkgbase//+/\\+}(:.+)?\"?\\]).+\\]" < "${config}"); then
+	if [[ -n ${pkgbase} ]] && property=$(grep --max-count=1 --perl-regexp "^\\[(?!\"?${pkgbase//+/\\+}\"?\\]).+\\]" < "${config}"); then
 		printf "non-pkgbase section not supported in %s: %s" "${config}" "${property}"
 		return 1
 	fi