From 882f025fde8595408e8694ae0a66af5a18879943 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 5 Jan 2016 10:36:38 +0200
Subject: Add version management script

---
 version | 237 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 237 insertions(+)
 create mode 100755 version

diff --git a/version b/version
new file mode 100755
index 0000000..f904839
--- /dev/null
+++ b/version
@@ -0,0 +1,237 @@
+#! /usr/bin/env bash
+
+# Manage build2 toolchain version.
+#
+# Usage: version [<module>...]
+#
+usage="usage: $0 [<module>...]"
+
+# Notes:
+#
+# * min/max are [min, max)
+#   if min == max, then '== min' is assumed
+#   if max is unspecified, then '>= min' is assumed
+#
+
+build2_min=0.1.0 # No max, always >=.
+
+libbutl=0.1.0
+libbutl_min=$libbutl
+libbutl_max=$libbutl
+libbutl_build2=$build2_min
+libbutl_hxx=butl/version
+
+build2=0.1.0
+build2_libbutl_min=$libbutl_min
+build2_libbutl_max=$libbutl_max
+build2_build2=$build2_min
+build2_hxx=build2/version
+
+libbpkg=0.1.0
+libbpkg_min=$libbpkg
+libbpkg_max=$libbpkg
+libbpkg_libbutl_min=$libbutl_min
+libbpkg_libbutl_max=$libbutl_max
+libbpkg_build2=$build2_min
+libbpkg_hxx=bpkg/version
+
+bpkg=0.1.0
+bpkg_libbutl_min=$libbutl_min
+bpkg_libbutl_max=$libbutl_max
+bpkg_libbpkg_min=$libbpkg_min
+bpkg_libbpkg_max=$libbpkg_max
+bpkg_build2=$build2_min
+bpkg_hxx=bpkg/bpkg-version
+
+build2_toolchain=0.1.0
+build2_toolchain_build2=$build2_min
+
+brep=0.1.0
+brep_libbutl_min=$libbutl_min
+brep_libbutl_max=$libbutl_max
+brep_libbpkg_min=$libbpkg_min
+brep_libbpkg_max=$libbpkg_max
+brep_build2=$build2_min
+brep_hxx=brep/version
+
+#
+#
+owd=`pwd`
+trap "{ cd $owd; exit 1; }" ERR
+set -o errtrace # Trap in functions.
+
+function info () { echo "$*" 1>&2; }
+function error () { info "$*"; exit 1; }
+
+modules=
+
+while [ $# -gt 0 ]; do
+  case $1 in
+    *)
+      modules="$modules ${1%/}"
+      shift
+      ;;
+  esac
+done
+
+if [ -z "$modules" ]; then
+  modules="libbutl build2 libbpkg bpkg build2-toolchain brep"
+fi
+
+# Convert string version representation (1.2.3-a1) to its numeric equivalent
+# in the form AABBCCDD where:
+#
+# AA - major version number
+# BB - minor version number
+# CC - bugfix version number
+# DD - alpha / beta (DD + 50) version number
+#
+# When DD is not 00, 1 is subtracted from AABBCC. For example:
+#
+# Version     AABBCCDD
+# 2.0.0       02000000
+# 2.1.0       02010000
+# 2.1.1       02010100
+# 2.2.0-a1    02019901
+# 3.0.0-b2    02999952
+#
+# For a version in the 1.2.3- form, it returns (AABBCC-1)00, which is the
+# highest possible version that is less than 1.2.3-.
+#
+function str_num () # <ver-str>
+{
+  # Here we assume the version is valid.
+  #
+  local a=`echo $1 | sed -e 's/\([0-9]*\).*/\1/' -`
+  local b=`echo $1 | sed -e 's/[^.]*\.\([0-9]*\).*/\1/' -`
+  local c=`echo $1 | sed -e 's/[^.]*\.[^.]*\.\([0-9]*\).*/\1/' -`
+  local d=`echo $1 | sed -n -e 's/[^.]*\.[^.]*\.[^-]*\(-[ab]*[0-9]*\)/\1/p' -`
+
+  local v=$(($a * 1000000 + $b * 10000 + $c * 100))
+
+  if [ "$d" ]; then
+    ((v -= 100))
+    if [ $d != "-" ]; then
+      if [ ${d:1:1} = 'b' ]; then
+	((v += 50))
+      fi
+      d=`echo $d | sed -e 's/-[ab]\([0-9]*\)/\1/' -`
+      ((v += $d))
+    fi
+  fi
+
+  #info $1 -> $a $b $c $d -> $v
+  echo $v
+}
+
+function str_num_test () { if [ `str_num $1` != $2 ]; then error $1 != $2; fi }
+
+str_num_test 2.0.0    2000000
+str_num_test 2.1.0    2010000
+str_num_test 2.1.1    2010100
+str_num_test 2.2.0-a1 2019901
+str_num_test 3.0.0-b2 2999952
+
+str_num_test 2.0.0-   1999900
+str_num_test 2.2.0-   2019900
+
+# In-place sed.
+#
+function ised () # <regex> <file>
+{
+  local r=$1
+  local f=$2
+  local o=$f.orig
+
+  mv $f $o
+  cp -p $o $f # Keep owner, permissions.
+
+  if ! sed -e "$r" $o >$f; then
+    mv $o $f
+    return 1
+  fi
+
+  if cmp -s $o $f; then
+    mv $o $f
+  else
+    rm $o
+  fi
+}
+
+# Modules which we may depend on. These are translated to 'depends:' in the
+# manifest and preprocessor checks in the version header. Note that we can
+# add external modules like libodb, etc., when the time comes.
+#
+depends="libbutl libbpkg"
+
+for m in $modules; do
+  v=`echo $m | sed -e 's/-/_/g'`
+  V=`echo $v | sed -e 's/\(.*\)/\U\1/'`
+
+  s=${!v}
+  n=`str_num $s`
+
+  b=${v}_build2; b=${!b}
+
+  # version
+  #
+  ised "s/^[0-9].*/$s/" $m/version
+
+  # manifest
+  #
+  if [ -f $m/manifest ]; then
+    ised "s/^\(version:\) .*/\1 $s/" $m/manifest
+    ised "s/^\(requires: build2\) .*/\1 >= $b/" $m/manifest
+  fi
+
+  # bootstrap.build
+  #
+  ised "s/^\(version =\) .*/\1 $s/" $m/build/bootstrap.build
+  ised "s/^\(using build@\).*/\1$b/" $m/build/bootstrap.build
+
+  # version header
+  #
+  h=${v}_hxx; h=${!h}
+  if [ "$h" ]; then
+    ised "s/^\(#define ${V}_VERSION\) .*/\1 $n/" $m/$h
+    ised "s/^\(#define ${V}_VERSION_STR\) .*/\1 \"$s\"/" $m/$h
+  fi
+
+  # Dependencies (manifest and version header).
+  #
+  for d in $depends; do
+    if [ $d = $m ]; then continue; fi
+
+    dv=`echo $d | sed -e 's/-/_/g'`
+    DV=`echo $dv | sed -e 's/\(.*\)/\U\1/'`
+
+    dmin=${v}_${dv}_min; dmin=${!dmin}
+    dmax=${v}_${dv}_max; dmax=${!dmax}
+
+    if [ -z "$dmin" ]; then continue; fi # No dependency.
+
+    dminn=`str_num $dmin`
+
+    # Figure out dependency contraints for the manifest and the header.
+    #
+    if [ -z "$dmax" ]; then
+      dcm=">= $dmin"
+      dch="${DV}_VERSION < $dminn"
+    elif [ "$dmin" = "$dmax" ]; then
+      dcm="== $dmin"
+      dch="${DV}_VERSION != $dminn"
+    else
+      dmaxn=`str_num $dmax`
+      dcm="[$dmin, $dmax)"
+      dch="${DV}_VERSION < $dminn || ${DV}_VERSION > $dmaxn"
+    fi
+
+    if [ -f $m/manifest ]; then
+      ised "s/^\(depends: $d\) .*/\1 $dcm/" $m/manifest
+    fi
+
+    if [ "$h" ]; then
+      ised "s/^#if ${DV}_VERSION .*/#if $dch/" $m/$h
+    fi
+  done
+done
-- 
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