makepkg: Implement 'autolibprovides'/'autolibdepends' options

 'autolibprovides' tries to find all real (no symlinks) library names
 in the paths a compiler/linker search for by default. And then add
 those libraries to 'libprovides'.

 'autolibdepends' searches all libraries and binaries in default
 paths for library dependencies, then adds those dependencies to
 'libdepends'.

 Both options are disabled by default.`

Signed-off-by: Mohammad AlSaleh <[email protected]>

Author: MoSal

etc/makepkg.conf.in

@@ -73,19 +73,20 @@ BUILDENV=(!distcc color !ccache check !sign)
 #   These are default values for the options=() settings
 #########################################################################
 #
-# Default: OPTIONS=(!strip docs libtool staticlibs emptydirs !zipman !purge !debug)
+# Default: OPTIONS=(!strip docs libtool staticlibs emptydirs !zipman !purge !debug !autolibprovides !autolibdepends)
 #  A negated option will do the opposite of the comments below.
 #
-#-- strip:      Strip symbols from binaries/libraries
-#-- docs:       Save doc directories specified by DOC_DIRS
-#-- libtool:    Leave libtool (.la) files in packages
-#-- staticlibs: Leave static library (.a) files in packages
-#-- emptydirs:  Leave empty directories in packages
-#-- zipman:     Compress manual (man and info) pages in MAN_DIRS with gzip
-#-- purge:      Remove files specified by PURGE_TARGETS
-#-- debug:      Add debugging flags as specified in DEBUG_* variables
-#
-OPTIONS=(strip docs libtool staticlibs emptydirs zipman purge !debug)
+#-- strip:           Strip symbols from binaries/libraries
+#-- docs:            Save doc directories specified by DOC_DIRS
+#-- libtool:         Leave libtool (.la) files in packages
+#-- staticlibs:      Leave static library (.a) files in packages
+#-- emptydirs:       Leave empty directories in packages
+#-- zipman:          Compress manual (man and info) pages in MAN_DIRS with gzip
+#-- purge:           Remove files specified by PURGE_TARGETS
+#-- autolibprovides: Auto-add so provides
+#-- autolibdepends:  Auto-add so depends
+#
+OPTIONS=(strip docs libtool staticlibs emptydirs zipman purge !debug !autolibprovides !autolibdepends)
 
 #-- File integrity checks to use. Valid: md5, sha1, sha224, sha256, sha384, sha512
 INTEGRITY_CHECK=(md5)

scripts/makepkg.sh.in

@@ -48,6 +48,8 @@ declare -r startdir="$(pwd -P)"
 
 LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
 
+packaging_options+=('autolibprovides')
+packaging_options+=('autolibdepends')
 build_options=('ccache' 'distcc' 'buildflags' 'makeflags')
 splitpkg_overrides=('pkgdesc' 'arch' 'url' 'license' 'groups' 'depends'
                     'optdepends' 'provides' 'conflicts' 'replaces' 'backup'
@@ -499,6 +501,42 @@ run_package() {
 	run_function_safe "package${1:+_$1}"
 }
 
+auto_libdepends() {
+	local l f solib search_paths bin_paths autolibdepends
+
+	msg2 "$(gettext "Auto-adding libdepends...")"
+
+	# Only search default library/binary paths
+	search_paths=($(${CC:-gcc} -print-search-dirs | grep '^lib' | sed "s|^libraries: =|:|;s|:| ${pkgdir}|g"))
+	bin_paths=(${pkgdir}${PATH//:/ ${pkgdir}})
+
+	for f in $(find ${search_paths[@]} ${bin_paths[@]} -maxdepth 1 -type f 2>/dev/null); do
+		# Skip files with relative path to avoid wasting time on dups
+		if [[ ! "$f" =~ \.\./ ]]; then
+			while read solib; do
+				if ! in_array "${solib}" ${autolibdepends[@]}; then
+					autolibdepends+=(${solib})
+				fi
+			done < <(LC_ALL=C readelf -d "$f" 2>/dev/null | grep '(NEEDED)' | while read l; do
+				l="${l#*\[}"
+				echo "${l%.so*}.so"
+			done)
+		fi
+	done
+
+	# Pass depends if there is any
+	# We don't do this unconditionally to avoid passing an empty line to mapfile
+	if [[ ${depends[@]} ]]; then
+		printf '%s\n' "${depends[@]}"
+	fi
+
+	# Print and pass autolibdepends if any was found
+	if [[ ${autolibdepends[@]} ]]; then
+		msg2 "$(gettext "Auto-added libdepends %s")" "${autolibdepends[@]}"
+		printf '%s\n' "${autolibdepends[@]}"
+	fi
+}
+
 find_libdepends() {
 	local d sodepends
 
@@ -563,6 +601,34 @@ find_libdepends() {
 	(( ${#libdepends[@]} )) && printf '%s\n' "${libdepends[@]}"
 }
 
+auto_libprovides() {
+	local f solib search_paths autolibprovides
+
+	msg2 "$(gettext "Auto-adding libprovides...")"
+
+	# Only search default library paths
+	search_paths=($(${CC:-gcc} -print-search-dirs | grep '^lib' | sed "s|^libraries: =|:|;s|:| ${pkgdir}|g"))
+
+	for f in $(find ${search_paths[@]} -maxdepth 1 -type f 2>/dev/null); do
+		# Match solibs, but exclude ones with a relative path to avoid dups
+		if [[ "$f" =~ \.so ]]  && [[ ! "$f" =~ \.\./ ]]; then
+			solib="${f##*/}"
+			autolibprovides+=("${solib%.so*}.so")
+		fi
+	done
+
+	# Pass provides if there is any
+	# We don't do this unconditionally to avoid passing an empty line to mapfile
+	if [[ ${provides[@]} ]]; then
+		printf '%s\n' "${provides[@]}"
+	fi
+
+	# Print and pass autolibprovides if any was found
+	if [[ ${autolibprovides[@]} ]]; then
+		msg2 "$(gettext "Auto-added libprovides %s")" "${autolibprovides[@]}"
+		printf '%s\n' "${autolibprovides[@]}"
+	fi
+}
 
 find_libprovides() {
 	local p libprovides missing
@@ -655,7 +721,14 @@ write_pkginfo() {
 	write_kv_pair "size" "$size"
 	write_kv_pair "arch" "$pkgarch"
 
+	if check_option "autolibprovides" "y"; then
+		mapfile -t provides < <(auto_libprovides)
+	fi
 	mapfile -t provides < <(find_libprovides)
+
+	if check_option "autolibdepends" "y"; then
+		mapfile -t depends < <(auto_libdepends)
+	fi
 	mapfile -t depends < <(find_libdepends)
 
 	write_kv_pair "license"     "${license[@]}"