[ptxdist] [RFC PATCH] ptxdist: add repology sub command

[Bruno Thomsen <bruno.thomsen@gmail.com>]

Improve ptxdist project visibility by adding it to repology.

Generate JSON output about all packages in ptxdist for repology.

ptxdist repology | tail -n +7 | jq

This is just a POC for integrating ptxdist with repology. 

Add PTXdist support #1487:
https://github.com/repology/repology-updater/issues/1487

I have run this patch against ptxdist-2024.12.0 and got this output:
https://github.com/baxeno/ptxdist-repology/blob/main/repology.json

Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
---
Any feedback is welcome as this is a very rough implementation.

 bin/ptxdist                             |  6 +++
 rules/post/ptxd_make_repology.make      | 20 +++++++++
 scripts/bash_completion                 |  2 +-
 scripts/lib/ptxd_make_world_repology.sh | 54 +++++++++++++++++++++++++
 4 files changed, 81 insertions(+), 1 deletion(-)
 create mode 100644 rules/post/ptxd_make_repology.make
 create mode 100644 scripts/lib/ptxd_make_world_repology.sh

diff --git a/bin/ptxdist b/bin/ptxdist
index 1f561fdf6..24a8e2ed9 100755
--- a/bin/ptxdist
+++ b/bin/ptxdist
@@ -799,6 +799,7 @@ Misc:
 				variable and print the contents of this variable
   licensecheck			check md5sums of license files for all packages
   lint				run some basic checks for the bsp and PTXdist
+  repology			generate repology JSON for PTXdist
   list-packages			print a list of all selected packages
   local-src <pkg> [<directory>]	overwrite a package source with a locally provided
 				directory containing the sourcecode.
@@ -1916,6 +1917,11 @@ EOF
 				ptxd_bailout "lint checks failed"
 			fi
 			;;
+		repology)
+			check_premake_compiler &&
+			ptxd_make_log ptxdist-repology
+			exit
+			;;
 		list-packages)
 			check_config &&
 			check_deps &&
diff --git a/rules/post/ptxd_make_repology.make b/rules/post/ptxd_make_repology.make
new file mode 100644
index 000000000..b243ed03e
--- /dev/null
+++ b/rules/post/ptxd_make_repology.make
@@ -0,0 +1,20 @@
+# -*-makefile-*-
+#
+# Copyright (C) 2025 by Bruno Thomsen <bruno.thomsen@gmail.com>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+PHONY += ptxdist-repology
+
+ptx/repology = \
+	$(call ptx/env) \
+	ptx_dgen_rulesfiles_make="$(PTX_DGEN_RULESFILES_MAKE)" \
+	ptxd_make_world_repology
+
+ptxdist-repology:
+	@$(call targetinfo)
+	@$(call ptx/repology)
+
+# vim: syntax=make
diff --git a/scripts/bash_completion b/scripts/bash_completion
index 4bff2d4b6..2bb21a848 100644
--- a/scripts/bash_completion
+++ b/scripts/bash_completion
@@ -123,7 +123,7 @@ _ptxdist_completion()
 	clean)
 		COMPREPLY=( $( compgen -W root -- $cur ) )
 		;&
-	get|extract|prepare|compile|install|targetinstall|tags|urlcheck|licensecheck|package-info|cargosync)
+	get|extract|prepare|compile|install|targetinstall|tags|urlcheck|licensecheck|repology|package-info|cargosync)
 		COMPREPLY+=( $( compgen -W "$(__ptxdist_completion_packages)" -- $cur ) )
 		;;
 	drop)
diff --git a/scripts/lib/ptxd_make_world_repology.sh b/scripts/lib/ptxd_make_world_repology.sh
new file mode 100644
index 000000000..2b3a0a098
--- /dev/null
+++ b/scripts/lib/ptxd_make_world_repology.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+#
+# Copyright (C) 2025 by Bruno Thomsen <bruno.thomsen@gmail.com>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+ptxd_make_world_repology() {
+	local filefd file
+	local first
+	ptxd_make_world_init
+
+	echo "Locating all target packages ..."
+
+	first=1
+	exec {filefd}< <(ptxd_make_world_lint_makefiles)
+	while read file <&${filefd}; do
+	filename="${file##*/}"
+
+	case "${filename}" in
+		host-system-*|host-*|cross-*|image-*)
+		continue
+		;;
+		*)
+		;;
+	esac
+	case "${file}" in
+		*/rules/post/*|*/rules/pre/*)
+			continue
+			;;
+		*)
+			;;
+	esac
+	grep -q '^[^ 	]*_VERSION[ 	:]*=' "${file}" || continue
+
+	pkg_name=$(grep '^PACKAGES-$(PTXCONF_' "${file}" | cut -d '=' -f 2 | xargs)
+	pkg_version=$(grep '^[^ 	]*_VERSION[ 	:]*=' "${file}" | cut -d '=' -f 2 | xargs)
+	pkg_license=$(grep '^[^ 	]*_LICENSE[ 	:]*=' "${file}" | cut -d '=' -f 2 | xargs)
+
+	[[ "$pkg_license" == *"call remove_quotes"* ]] && continue
+	[[ "$pkg_version" == *"call ptx/"* ]] && continue
+
+	if [ $first -eq 1 ]; then
+		first=0
+		echo "["
+	else
+		echo ","
+	fi
+	echo "{\"name\": \"${pkg_name}\", \"version\": \"${pkg_version}\", \"license\": \"${pkg_license}\"}"
+	done
+	echo "]"
+}
+export -f ptxd_make_world_repology

base-commit: f61905c23240642dec3e5390ee15e83cf1e016e9
-- 
2.49.0