From: Paul Spooren <mail@aparcar.org>
Date: Fri, 21 Aug 2020 01:44:51 +0000 (-1000)
Subject: build: add whatdepends target to imagebuilder
X-Git-Tag: v21.02.0-rc1~1724
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=84024e245f346cdf1da955cea4ab4c2c0a0886b2;p=openwrt%2Fstaging%2Fchunkeey.git

build: add whatdepends target to imagebuilder

The package manager `opkg` offers the function `whatdepends` to print
packages that depend on a specific package.

This feature is useful when used in a CI to not only build an upgraded
package but all packages with a dependency.

Usage:
    make whatdepends PACKAGE=libipset

The resulting list can be fed into a SDK building all packages and warn
if anything fails.

Signed-off-by: Paul Spooren <mail@aparcar.org>
---

diff --git a/target/imagebuilder/files/Makefile b/target/imagebuilder/files/Makefile
index 326dd2ba2f..27d3cfa8df 100644
--- a/target/imagebuilder/files/Makefile
+++ b/target/imagebuilder/files/Makefile
@@ -220,4 +220,12 @@ manifest: FORCE
 		$(if $(PROFILE),USER_PROFILE="$(PROFILE_FILTER)") \
 		$(if $(PACKAGES),USER_PACKAGES="$(PACKAGES)"))
 
-.SILENT: help info image manifest
+whatdepends: FORCE
+ifeq ($(PACKAGE),)
+	@echo 'Variable `PACKAGE` is not set but required by `whatdepends`'
+	@exit 1
+endif
+	@$(MAKE) -s package_reload
+	@$(OPKG) whatdepends -A $(PACKAGE)
+
+.SILENT: help info image manifest whatdepends