From 38a7e34b50e2e38881a1a78bb1a350c19218a56b Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Jan 24 2020 21:14:09 +0000
Subject: project: added custom config step, logic to detect automake's version & year.


---

diff --git a/config.project b/config.project
index cfb520e..63adb57 100644
--- a/config.project
+++ b/config.project
@@ -12,7 +12,7 @@ mb_disable_static=yes
 mb_disable_shared=yes
 
 # custom config step
-mb_use_custom_cfgdefs=no
+mb_use_custom_cfgdefs=yes
 mb_use_custom_cfgtest=no
 
 # pkgconfig
diff --git a/project/config/cfgdefs.in b/project/config/cfgdefs.in
new file mode 100644
index 0000000..789a8a7
--- /dev/null
+++ b/project/config/cfgdefs.in
@@ -0,0 +1,6 @@
+# variant
+AUTOMAKE_VER               = @automake_ver@
+AUTOMAKE_YEAR              = @automake_year@
+AUTOMAKE_MAJOR             = @automake_major@
+AUTOMAKE_MINOR             = @automake_minor@
+AUTOMAKE_MICRO             = @automake_micro@
diff --git a/project/config/cfgdefs.sh b/project/config/cfgdefs.sh
new file mode 100644
index 0000000..ed1d3a0
--- /dev/null
+++ b/project/config/cfgdefs.sh
@@ -0,0 +1,65 @@
+# in projects where [ $mb_use_custom_cfgdefs = yes ],
+# cfgdefs.sh is invoked from within ./configure via
+# . $mb_project_dir/project/cfgdefs.sh
+
+# this file is covered by COPYING.BAUTOMAKE.
+
+# a successful return from cfgdefs.sh will be followed
+# by a second invocation of the config_copy() function,
+# reflecting any changes to common config variables
+# made by cfgdefs.sh.
+
+# finally, cfgdefs.sh may update the contents of the
+# config-time generated cfgdefs.mk.
+
+
+for arg ; do
+	case "$arg" in
+		*)
+			error_msg ${arg#}: "unsupported config argument."
+			exit 2
+	esac
+done
+
+
+cfgdefs_detect_automake_version()
+{
+	automake_ver=$(grep 'VERSION' "$mb_source_dir/doc/version.texi")
+	automake_ver=${automake_ver##* }
+
+	automake_year=$(grep 'UPDATED-MONTH' "$mb_source_dir/doc/version.texi")
+	automake_year=${automake_year##* }
+
+	automake_major=$(printf '%s' "$automake_ver" | cut -d'.' -f1)
+	automake_minor=$(printf '%s' "$automake_ver" | cut -d'.' -f2)
+	automake_micro=$(printf '%s' "$automake_ver" | cut -d'.' -f3)
+
+	if [ -z "$automake_major" ] || [ -z "$automake_minor" ]; then
+		error_msg "Could not properly parse automake's version.texi"
+		exit 2
+	fi
+}
+
+
+cfgdefs_output_custom_defs()
+{
+	sed \
+			-e 's/@automake_ver@/'"$automake_ver"'/g'       \
+			-e 's/@automake_year@/'"$automake_year"'/g'     \
+			-e 's/@automake_major@/'"$automake_major"'/g'   \
+			-e 's/@automake_minor@/'"$automake_minor"'/g'   \
+			-e 's/@automake_micro@/'"$automake_micro"'/g'   \
+		"$mb_project_dir/project/config/cfgdefs.in"         \
+	| sed -e 's/[ \t]*$//g'                                     \
+			>> "$mb_pwd/cfgdefs.mk"
+}
+
+
+# automake version info
+cfgdefs_detect_automake_version
+
+# cfgdefs.in --> cfgdefs.mk
+cfgdefs_output_custom_defs
+
+# all done
+return 0
diff --git a/project/config/cfgdefs.usage b/project/config/cfgdefs.usage
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/project/config/cfgdefs.usage