Improve the beta number generation.

* autogen.sh: Add option --find-version
* configure.ac: Rework the setting of the mym4_ variables.
--

The old system was not too well defined if no release for a series has
yet been done.  We now introduce a "PACKAGE-N.M-base" tag to solve
this problem.  To keep the M4 code readable the GIT parsing has been
moved to ./autogen.sh.

autogen.rc

@@ -1,5 +1,7 @@
 # autogen.sh configuration for GnuPG                           -*- sh -*-
 
+#version_parts=3
+
 case "$myhost:$myhostsub" in
   w32:ce)
     extraoptions="--enable-dirmngr-auto-start --disable-scdaemon "

autogen.sh

@@ -15,7 +15,7 @@
 # configure it for the respective package.  It is maintained as part of
 # GnuPG and source copied by other packages.
 #
-# Version: 2014-01-10
+# Version: 2014-06-06
 
 configure_ac="configure.ac"
 
@@ -41,7 +41,7 @@ fatal () {
 
 info () {
     if [ -z "${SILENT}" ]; then
-      echo "autogen.sh:" "$*"
+      echo "autogen.sh:" "$*" >&2
     fi
 }
 
@@ -72,6 +72,7 @@ FORCE=
 SILENT=
 tmp=$(dirname "$0")
 tsdir=$(cd "${tmp}"; pwd)
+version_parts=3
 
 if [ -n "${AUTOGEN_SH_SILENT}" ]; then
   SILENT=" --silent"
@@ -133,6 +134,11 @@ amd64_toolprefixes=
 myhost=""
 myhostsub=""
 case "$1" in
+    --find-version)
+        myhost="find-version"
+        SILENT=" --silent"
+        shift
+        ;;
     --build-w32)
         myhost="w32"
         shift
@@ -172,6 +178,57 @@ if [ -f "$HOME/.gnupg-autogen.rc" ]; then
     . "$HOME/.gnupg-autogen.rc"
 fi
 
+
+# **** FIND VERSION ****
+# This is a helper for the configure.ac M4 magic
+# Called
+#   ./autogen.sh --find-version PACKAGE MAJOR MINOR [MICRO]
+# returns a complete version string with automatic beta numbering.
+if [ "$myhost" = "find-version" ]; then
+    package="$1"
+    major="$2"
+    minor="$3"
+    micro="$4"
+
+    case "$version_parts" in
+      2)
+        matchstr1="$package-$major.*[0-9]"
+        matchstr2="$package-$major-base"
+        vers="$major.$minor"
+        ;;
+      *)
+        matchstr1="$package-$major.$minor.*[0-9]"
+        matchstr2="$package-$major.$minor-base"
+        vers="$major.$minor.$micro"
+        ;;
+    esac
+
+    beta=no
+    if [ -d .git ]; then
+      ingit=yes
+      tmp=$(git describe --match "${matchstr1}" --long 2>/dev/null \
+            | awk -F- '$3!=0 && $3 !~ /^beta/ {print"-beta"$3}' )
+      if [ -z "$tmp" ]; then
+          tmp=$(git describe --match "${matchstr2}" --long 2>/dev/null \
+                | awk -F- '$4!=0{print"-beta"$4}')
+      fi
+      [ -n "$tmp" ] && beta=yes
+      rev=$(git rev-parse --short HEAD | tr -d '\n\r')
+      rvd=$((0x$(echo ${rev} | head -c 4)))
+    else
+      ingit=no
+      beta=yes
+      tmp="-unknown"
+      rev="0000000"
+      rvd="0"
+    fi
+
+    echo "$package-$vers$tmp:$beta:$ingit:$vers$tmp:$vers:$tmp:$rev:$rvd:"
+    exit 0
+fi
+# **** end FIND VERSION ****
+
+
 # ******************
 #  W32 build script
 # ******************

configure.ac

@@ -26,23 +26,29 @@ min_automake_version="1.10"
 # (git tag -s gnupg-2.n.m) and run "./autogen.sh --force".  Please
 # bump the version number immediately *after* the release and do
 # another commit and push so that the git magic is able to work.
-m4_define([mym4_version], [2.1.0])
+m4_define([mym4_package],[gnupg])
+m4_define([mym4_major], [2])
+m4_define([mym4_minor], [1])
+m4_define([mym4_micro], [0])
+
+# To start a new development series, i.e a new major or minor number
+# you need to mark an arbitrary commit before the first beta release
+# with an annotated tag.  For example the 2.1 branch starts off with
+# the tag "gnupg-2.1-base".  This is used as the base for counting
+# beta numbers before the first release of a series.
 
 # Below is m4 magic to extract and compute the git revision number,
 # the decimalized short revision number, a beta version string and a
-# flag indicating a development version (mym4_isgit).  Note that the
+# flag indicating a development version (mym4_isbeta).  Note that the
 # m4 processing is done by autoconf and not during the configure run.
-m4_define([mym4_revision],
+m4_define([mym4_verslist], m4_split(m4_esyscmd([./autogen.sh --find-version] \
-          m4_esyscmd([git rev-parse --short HEAD | tr -d '\n\r']))
+                           mym4_package mym4_major mym4_minor mym4_micro),[:]))
-m4_define([mym4_revision_dec],
+m4_define([mym4_isbeta],       m4_argn(2, mym4_verslist))
-          m4_esyscmd_s([echo $((0x$(echo ]mym4_revision[|head -c 4)))]))
+m4_define([mym4_version],      m4_argn(4, mym4_verslist))
-m4_define([mym4_betastring],
+m4_define([mym4_revision],     m4_argn(7, mym4_verslist))
-          m4_esyscmd_s([git describe --match 'gnupg-2.[0-9].*[0-9]' --long|\
+m4_define([mym4_revision_dec], m4_argn(8, mym4_verslist))
-                        awk -F- '$3!=0{print"-beta"$3}']))
-m4_define([mym4_isgit],m4_if(mym4_betastring,[],[no],[yes]))
-m4_define([mym4_full_version],[mym4_version[]mym4_betastring])
 
-AC_INIT([gnupg],[mym4_full_version], [http://bugs.gnupg.org])
+AC_INIT([mym4_package],[mym4_version], [http://bugs.gnupg.org])
 
 NEED_GPG_ERROR_VERSION=1.13
 
@@ -61,7 +67,7 @@ NEED_NPTH_VERSION=0.91
 NEED_GNUTLS_VERSION=3.0
 
 
-development_version=mym4_isgit
+development_version=mym4_isbeta
 PACKAGE=$PACKAGE_NAME
 PACKAGE_GT=${PACKAGE_NAME}2
 VERSION=$PACKAGE_VERSION