generate-version.sh

   1 #!/bin/sh
   2 # Not a shell script, but something intended to be sourced from shell scripts
   3 git_available_p() {
   4     # Check that (1) we have git (2) this is a git tree.
   5     if ( which git >/dev/null 2>/dev/null && git describe >/dev/null 2>/dev/null )
   6     then
   7         echo "ok"
   8     else
   9         echo ""
  10     fi
  11 }
  12
  13 generate_version() {
  14     AVAILABLE=`git_available_p`
  15     if [ -f version.lisp-expr -a -z "$AVAILABLE" ]
  16     then
  17         # Relase tarball, leave version.lisp-expr alone.
  18         return
  19     elif [ -z "$AVAILABLE" ]
  20     then
  21         echo "Can't run 'git describe' and version.lisp-expr is missing." >&2
  22         echo "To fix this, either install git or create a fake version.lisp-expr file." >&2
  23         echo "You can create a fake version.lisp-expr file like this:" >&2
  24         echo "    \$ echo '\"1.0.99.999\"' > version.lisp-expr" >&2
  25         exit 1
  26     fi
  27     # Build it.
  28     version_head=`git rev-parse HEAD`
  29     if grep -q "ref: refs/heads/.*" .git/HEAD > /dev/null 2>&1
  30     then
  31         version_branchname=`cut -d / -f 3- < .git/HEAD`
  32     else
  33         # Detached head.
  34         version_branchname="HEAD"
  35     fi
  36     if [ -z "$SBCL_BUILDING_RELEASE_FROM" ]
  37     then
  38         if [ "`git rev-list HEAD --not origin/master`" = '' ]
  39         then
  40             # If origin/master contains all the commits on current
  41             # branch, use current head as the root instead.
  42             version_root="$version_branchname"
  43         else
  44             version_root="origin/master"
  45         fi
  46     else
  47         version_root="$SBCL_BUILDING_RELEASE_FROM"
  48     fi
  49     version_base=`git rev-parse "$version_root"`
  50     version_tag=`git describe --tags --match="sbcl*" --abbrev=0 $version_base`
  51     version_release=`echo $version_tag | sed -e 's/sbcl[_-]//' | sed -e 's/_/\./g'`
  52     # Using wc -l instead of --count argument to rev-list because
  53     # pre-1.7.2 Gits are still common out in the wilderness.
  54     version_n_root=`git rev-list $version_base --not $version_tag | wc -l`
  55     version_n_branch=`git rev-list HEAD --not $version_base | wc -l`
  56     if [ -z "$NO_GIT_HASH_IN_VERSION" ]
  57     then
  58         version_hash="-`git rev-parse --short $version_head`"
  59     else
  60         version_hash=""
  61     fi
  62     if git diff HEAD --no-ext-diff --quiet --exit-code
  63     then
  64         version_dirty=""
  65     else
  66         version_dirty="-dirty"
  67     fi
  68     # Now that we have all the pieces, put them together.
  69     cat >version.lisp-expr <<EOF
  70 ;;; This file is auto-generated using generate-version.sh. Every time
  71 ;;; you re-run make.sh, this file will be overwritten if you are
  72 ;;; working from a Git checkout.
  73 EOF
  74     if [ "$version_base" = "$version_head" ]
  75     then
  76         if [ "0" = "$version_n_root" ]
  77         then
  78             printf "\"%s%s\"\n" \
  79                 $version_release $version_dirty >>version.lisp-expr
  80         else
  81             printf "\"%s.%s%s%s\"\n" \
  82                 $version_release $version_n_root \
  83                 $version_hash $version_dirty >>version.lisp-expr
  84         fi
  85     else
  86         echo "base=$version_base"
  87         echo "head=$version_head"
  88         printf "\"%s.%s.%s.%s%s%s\"\n" \
  89             $version_release $version_n_root \
  90             $version_branchname $version_n_branch \
  91             $version_hash $version_dirty >>version.lisp-expr
  92     fi
  93 }