[OpenWrt-Devel] [PATCH] package-ipkg.mk: allow to install CC packages on older versions

[Christian Schoenebeck]

Packages compiled on CC / trunk could not be installed on BB and before.
Why to block users from using updated packages like ca-certificates,
privoxy or updated luci-apps. Checks if default_postinst/prerm function
exists in /lib/functions.sh then run, otherwise run [xxx]-pkg script
if exists.

Signed-off-by: Christian Schoenebeck <christian.schoenebeck at gmail.com>

---
 include/package-ipkg.mk | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index 77eaeb8..584ab95 100644
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -195,13 +195,25 @@ $(_endef)
 		( \
 			echo "#!/bin/sh"; \
 			echo "[ \"\$$$${IPKG_NO_SCRIPT}\" = \"1\" ] && exit 0"; \
-			echo ". \$$$${IPKG_INSTROOT}/lib/functions.sh"; \
-			echo "default_postinst \$$$$0 \$$$$@"; \
+			echo "grep 'default_postinst' \$$$${IPKG_INSTROOT}/lib/functions.sh >/dev/null 2>&1 && {"; \
+			echo "    . \$$$${IPKG_INSTROOT}/lib/functions.sh"; \
+			echo "    default_postinst \$$$$0 \$$$$@"; \
+			echo "} || {"; \
+			echo "    name=\$$$$(echo \$$$$(basename \$$$$0) | cut -d. -f1)"; \
+			echo "    [ -f \$$$${IPKG_INSTROOT}/usr/lib/opkg/info/\$$$${name}.postinst-pkg ] && \\"; \
+			echo "        . \$$$${IPKG_INSTROOT}/usr/lib/opkg/info/\$$$${name}.postinst-pkg \$$$$@"; \
+			echo "}"; \
 		) > postinst; \
 		( \
 			echo "#!/bin/sh"; \
-			echo ". \$$$${IPKG_INSTROOT}/lib/functions.sh"; \
-			echo "default_prerm \$$$$0 \$$$$@"; \
+			echo "grep 'default_prerm' \$$$${IPKG_INSTROOT}/lib/functions.sh >/dev/null 2>&1 && {"; \
+			echo "    . \$$$${IPKG_INSTROOT}/lib/functions.sh"; \
+			echo "    default_prerm \$$$$0 \$$$$@"; \
+			echo "} || {"; \
+			echo "    name=\$$$$(echo \$$$$(basename \$$$$0) | cut -d. -f1)"; \
+			echo "    [ -f \$$$${IPKG_INSTROOT}/usr/lib/opkg/info/\$$$${name}.prerm-pkg ] && \\"; \
+			echo "        . \$$$${IPKG_INSTROOT}/usr/lib/opkg/info/\$$$${name}.prerm-pkg \$$$$@"; \
+			echo "}"; \
 		) > prerm; \
 		chmod 0755 prerm; \
 		$($(1)_COMMANDS) \
-- 
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