[gentoo-portage-dev] [PATCH 2/2] Add post-postinst checks for a few missed cache updates

[Michał Górny]

Add postinst-qa-check.d checks for missed desktop, mime-info and GTK+
icon cache updates. In all of the cases the checks simply look for any
installed files that are newer than the cache.

This check has some limitations: it assumes that mtime is not preserved
when copying files to D, it can't distinguish whether the files
were installed by the current package (it reports all new files since
the last cache update) and it can't distinguish between the update
on postinst and postrm. However, it's certainly a step forward and will
help find a few bugs.
---
 bin/postinst-qa-check.d/50gnome2-utils | 38 ++++++++++++++++++++
 bin/postinst-qa-check.d/50xdg-utils    | 65 ++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 bin/postinst-qa-check.d/50gnome2-utils
 create mode 100644 bin/postinst-qa-check.d/50xdg-utils

diff --git a/bin/postinst-qa-check.d/50gnome2-utils b/bin/postinst-qa-check.d/50gnome2-utils
new file mode 100644
index 000000000..68e21cb74
--- /dev/null
+++ b/bin/postinst-qa-check.d/50gnome2-utils
@@ -0,0 +1,38 @@
+# check for missing calls to gnome2-utils regen functions
+
+gnome2_icon_cache_check() {
+	local d f files=() find_args
+	for d in usr/share/icons/*/; do
+		# gnome2_icon_cache_update updates only themes with an index
+		[[ -f ${d}/index.theme ]] || continue
+
+		find_args=()
+		# if the cache does not exist at all, we complain for any file
+		# otherwise, we look for files newer than the cache
+		[[ -f ${d}/icon-theme.cache ]] &&
+			find_args+=( -newer "${d}"/icon-theme.cache )
+
+		# (use -mindepth 2 to easily skip the cache files)
+		while read -r -d $'\0' f; do
+			files+=( "${f}" )
+		done < <(find "${d}" -mindepth 2 -type f "${find_args[@]}" -print0)
+	done
+
+	if [[ ${files[@]} ]]; then
+		eqawarn "QA Notice: new icons were found installed but GTK+ icon cache"
+		eqawarn "has not been updated:"
+		eqatag -v gnome2-utils.icon-cache "${files[@]/#//}"
+		eqawarn "Please make sure to call gnome2_icon_cache_update()"
+		eqawarn "in pkg_postinst() and pkg_postrm() phases of appropriate pkgs."
+	fi
+}
+
+gnome2_utils_postinst_check() {
+	cd "${EROOT}" || die
+	gnome2_icon_cache_check
+}
+
+gnome2_utils_postinst_check
+: # guarantee successful exit
+
+# vim:ft=sh
diff --git a/bin/postinst-qa-check.d/50xdg-utils b/bin/postinst-qa-check.d/50xdg-utils
new file mode 100644
index 000000000..4bc7bee9a
--- /dev/null
+++ b/bin/postinst-qa-check.d/50xdg-utils
@@ -0,0 +1,65 @@
+# check for missing calls to xdg-utils regen functions
+
+xdg_desktop_database_check() {
+	local d f files=()
+	for d in usr/share/applications; do
+		[[ -d ${d} ]] || continue
+
+		find_args=()
+		# if the cache does not exist at all, we complain for any file
+		# otherwise, we look for files newer than the cache
+		[[ -f ${d}/mimeinfo.cache ]] &&
+			find_args+=( -newer "${d}"/mimeinfo.cache )
+
+		# look for any .desktop files that are newer than the cache
+		# and that have any mime types defined
+		while read -r -d $'\0' f; do
+			files+=( "${f}" )
+		done < <(find "${d}" -name '*.desktop' "${find_args[@]}" \
+			-exec grep -lZi '^MimeType=' {} +)
+	done
+
+	if [[ ${files[@]} ]]; then
+		eqawarn "QA Notice: .desktop files with MimeType= were found installed"
+		eqawarn "but desktop mimeinfo cache has not been updated:"
+		eqatag -v xdg-utils.desktop "${files[@]/#//}"
+		eqawarn "Please make sure to call xdg_desktop_database_update()"
+		eqawarn "in pkg_postinst() and pkg_postrm() phases of appropriate pkgs."
+	fi
+}
+
+xdg_mimeinfo_database_check() {
+	local d f files=()
+	for d in usr/share/mime; do
+		[[ -d ${d} ]] || continue
+
+		find_args=()
+		# if the cache does not exist at all, we complain for any file
+		# otherwise, we look for files newer than the cache
+		[[ -f ${d}/mime.cache ]] &&
+			find_args+=( -newer "${d}"/mime.cache )
+
+		while read -r -d $'\0' f; do
+			files+=( "${f}" )
+		done < <(find "${d}" -name '*.xml' "${find_args[@]}" -print0)
+	done
+
+	if [[ ${files[@]} ]]; then
+		eqawarn "QA Notice: mime-info files were found installed but mime-info"
+		eqawarn "cache has not been updated:"
+		eqatag -v xdg-utils.mime-info "${files[@]/#//}"
+		eqawarn "Please make sure to call xdg_mimeinfo_database_update()"
+		eqawarn "in pkg_postinst() and pkg_postrm() phases of appropriate pkgs."
+	fi
+}
+
+xdg_utils_postinst_check() {
+	cd "${EROOT}" || die
+	xdg_desktop_database_check
+	xdg_mimeinfo_database_check
+}
+
+xdg_utils_postinst_check
+: # guarantee successful exit
+
+# vim:ft=sh
-- 
2.14.1