src/scripts/reversion

   1 #!/bin/sh
   2 # Copyright (c) The Exim Maintainers 2017
   3
   4 set -e
   5 LC_ALL=C
   6 export LC_ALL
   7
   8 # Update Exim's version header file.
   9
  10 # Compatibility gross-ness for non-POSIX systems
  11 if [ -z "$EXIM_REVERSION_ADJUSTED" ]
  12 then
  13   SHELL=/bin/sh
  14   EXIM_REVERSION_ADJUSTED=yes
  15   export SHELL EXIM_REVERSION_ADJUSTED
  16   # Solaris:
  17   if [ -x /usr/xpg4/bin/sh ]
  18   then
  19     PATH="/usr/xpg4/bin:$PATH"
  20     SHELL=/usr/xpg4/bin/sh
  21     export PATH SHELL
  22   fi
  23   # Irix:
  24   _XPG=1 ; export _XPG
  25   #
  26   exec "$SHELL" "$0" "$@"
  27 fi
  28
  29 # Read version information that was generated by a previous run of
  30 # this script, or during the release process.
  31
  32 if   [ -f ./version.sh ]
  33 then .    ./version.sh
  34 elif [ -f ../src/version.sh ]
  35 then .    ../src/version.sh
  36 fi
  37
  38 # If this tree is a git working directory, use that to get version information.
  39
  40 if [ -d ../../.git ] || [ "$1" = "release" ]
  41 then
  42         # Modify the output of git describe into separate parts for
  43         # the name "exim" and the release and variant versions.
  44         # Put a dot in the version number and remove a spurious g.
  45         if [ "$2" ]
  46         then
  47             description=$(git describe "$2")
  48         else
  49             description=$(git describe --dirty=-XX --match 'exim-4*')
  50         fi
  51         set $(echo "$description" | sed 's|-| |;s|_|.|;s|[-_]| _|;s|-g|-|')
  52         # Only update if we need to
  53         if [ "$2 $3" != "$EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION" ]
  54         then
  55                 EXIM_RELEASE_VERSION="$2"
  56                 EXIM_VARIANT_VERSION="$3"
  57                 rm -f version.h
  58         fi
  59 fi
  60
  61 # If you are maintaining a patched version of Exim, you can either
  62 # create your own version.sh as part of your release process, or you
  63 # can modify EXIM_VARIANT_VERSION at this point in this script.
  64
  65 case "$EXIM_RELEASE_VERSION" in
  66 '')     echo "*** Your copy of Exim lacks any version information."
  67         exit 1
  68 esac
  69
  70 EXIM_COMPILE_NUMBER=$(expr "${EXIM_COMPILE_NUMBER:-0}" + 1)
  71
  72 echo "$EXIM_COMPILE_NUMBER" >cnumber.h
  73
  74 # Reproducible builds, accept a build timestamp override from environ per
  75 # <https://reproducible-builds.org/specs/source-date-epoch/>.
  76 # We require a fairly modern date(1) command here, which is not portable
  77 # to some of the systems Exim is built on.  That's okay, because the scenarios
  78 # are:
  79 #  1) Local postmaster building, not using $SOURCE_DATE_EPOCH, doesn't matter
  80 #  2) Packaging folks who don't care about reproducible builds
  81 #  3) Packaging folks who care but are using systems where date Just Works
  82 #  3) Packaging folks who care and can put a modern date(1) in $PATH
  83 #  4) Packaging folks who care and can supply us with a clean patch to support
  84 #     their requirements
  85 #  5) Packaging folks who care but won't do any work to support their strange
  86 #     old systems and want us to do the work for them.  We don't care either,
  87 #     they're SOL and have to live without reproducible builds.
  88 #
  89 exim_build_date_override=''
  90 if [ ".${SOURCE_DATE_EPOCH:-}" != "." ]; then
  91   fmt='+%d-%b-%Y %H:%M:%S'
  92   # Non-reproducible, we use __DATE__ and __TIME__ in C, which respect timezone
  93   # (think localtime, not gmtime); for reproduction between systems, UTC makes
  94   # more sense and the examples available use UTC without explicitly mandating
  95   # it.  I think that we can switch behavior and use UTC for reproducible
  96   # builds without it causing any problems: nothing really cares about timezone.
  97   # GNU date: "date -d @TS"
  98   # BSD date: "date -r TS"
  99   exim_build_date_override="$(date -u -d "@${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null || date -u -r "${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null)"
 100 fi
 101
 102 ( echo '# automatically generated file - see ../scripts/reversion'
 103   echo EXIM_RELEASE_VERSION='"'"$EXIM_RELEASE_VERSION"'"'
 104   echo EXIM_VARIANT_VERSION='"'"$EXIM_VARIANT_VERSION"'"'
 105   echo EXIM_COMPILE_NUMBER='"'"$EXIM_COMPILE_NUMBER"'"'
 106   if [ ".${exim_build_date_override:-}" != "." ]; then
 107     echo EXIM_BUILD_DATE_OVERRIDE='"'"${exim_build_date_override}"'"'
 108   fi
 109 ) >version.sh
 110
 111 if [ ! -f version.h ]
 112 then
 113 ( echo '/* automatically generated file - see ../scripts/reversion */'
 114   echo '#define EXIM_RELEASE_VERSION "'"$EXIM_RELEASE_VERSION"'"'
 115   echo '#define EXIM_VARIANT_VERSION "'"$EXIM_VARIANT_VERSION"'"'
 116   echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION EXIM_VARIANT_VERSION'
 117   if [ ".${exim_build_date_override:-}" != "." ]; then
 118     echo '#define EXIM_BUILD_DATE_OVERRIDE "'"${exim_build_date_override}"'"'
 119   fi
 120 ) >version.h
 121 fi
 122
 123 echo ">>> version $EXIM_RELEASE_VERSION$EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"
 124 echo