src/scripts/reversion

   1 #!/bin/sh
   2 # Copyright (c) The Exim Maintainers 1995 - 2018
   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 ]; then
  33     .    ./version.sh
  34 elif [ -f ../src/version.sh ]; then
  35     .    ../src/version.sh
  36 elif [ -d ../../.git ] || [ -f ../../.git ] || [ "$1" = release ]; then
  37     # Modify the output of git describe into separate parts for
  38     # the name "exim" and the release and variant versions.
  39     # Put a dot in the version number and remove a spurious g.
  40     if [ "$2" ]
  41     then
  42         description=$(git describe "$2")
  43     else
  44         description=$(git describe --dirty=-XX --match 'exim-4*')
  45     fi
  46     set $(echo "$description" | sed 's/-/ /; s/-g/-/')
  47     # Only update if we need to
  48     if [ "$2 $3" != "$EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION" ]
  49     then
  50             EXIM_RELEASE_VERSION="$2"
  51             EXIM_VARIANT_VERSION="$3"
  52             rm -f version.h
  53     fi
  54 else
  55     echo "Cannot determine the release number" >&2
  56     exit
  57 fi
  58
  59 # If you are maintaining a patched version of Exim, you can either
  60 # create your own version.sh as part of your release process, or you
  61 # can modify EXIM_VARIANT_VERSION at this point in this script.
  62
  63 if test -z "$EXIM_RELEASE_VERSION"; then
  64     echo "$0: Your copy of Exim lacks any version information." >&2
  65     exit 1
  66 fi
  67
  68 EXIM_COMPILE_NUMBER=$(expr "${EXIM_COMPILE_NUMBER:-0}" + 1)
  69
  70 echo "$EXIM_COMPILE_NUMBER" >cnumber.h
  71
  72 # Reproducible builds, accept a build timestamp override from environ per
  73 # <https://reproducible-builds.org/specs/source-date-epoch/>.
  74 # We require a fairly modern date(1) command here, which is not portable
  75 # to some of the systems Exim is built on.  That's okay, because the scenarios
  76 # are:
  77 #  1) Local postmaster building, not using $SOURCE_DATE_EPOCH, doesn't matter
  78 #  2) Packaging folks who don't care about reproducible builds
  79 #  3) Packaging folks who care but are using systems where date Just Works
  80 #  3) Packaging folks who care and can put a modern date(1) in $PATH
  81 #  4) Packaging folks who care and can supply us with a clean patch to support
  82 #     their requirements
  83 #  5) Packaging folks who care but won't do any work to support their strange
  84 #     old systems and want us to do the work for them.  We don't care either,
  85 #     they're SOL and have to live without reproducible builds.
  86 #
  87 exim_build_date_override=''
  88 if [ ".${SOURCE_DATE_EPOCH:-}" != "." ]; then
  89   fmt='+%d-%b-%Y %H:%M:%S'
  90   # Non-reproducible, we use __DATE__ and __TIME__ in C, which respect timezone
  91   # (think localtime, not gmtime); for reproduction between systems, UTC makes
  92   # more sense and the examples available use UTC without explicitly mandating
  93   # it.  I think that we can switch behavior and use UTC for reproducible
  94   # builds without it causing any problems: nothing really cares about timezone.
  95   # GNU date: "date -d @TS"
  96   # BSD date: "date -r TS"
  97   exim_build_date_override="$(date -u -d "@${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null || date -u -r "${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null)"
  98 fi
  99
 100 ( echo '# automatically generated file - see ../scripts/reversion'
 101   echo EXIM_RELEASE_VERSION='"'"$EXIM_RELEASE_VERSION"'"'
 102   test -n "$EXIM_VARIANT_VERSION" && \
 103   echo EXIM_VARIANT_VERSION='"'"$EXIM_VARIANT_VERSION"'"'
 104   echo EXIM_COMPILE_NUMBER='"'"$EXIM_COMPILE_NUMBER"'"'
 105   if [ ".${exim_build_date_override:-}" != "." ]; then
 106     echo EXIM_BUILD_DATE_OVERRIDE='"'"${exim_build_date_override}"'"'
 107   fi
 108 ) >version.sh
 109
 110 if [ ! -f version.h ]
 111 then
 112 ( echo '/* automatically generated file - see ../scripts/reversion */'
 113   echo '#define EXIM_RELEASE_VERSION "'"$EXIM_RELEASE_VERSION"'"'
 114   test -n "$EXIM_VARIANT_VERSION" && \
 115   echo '#define EXIM_VARIANT_VERSION "'"$EXIM_VARIANT_VERSION"'"'
 116   echo '#ifdef EXIM_VARIANT_VERSION'
 117   echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION "-" EXIM_VARIANT_VERSION'
 118   echo '#else'
 119   echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION'
 120   echo '#endif'
 121   if [ ".${exim_build_date_override:-}" != "." ]; then
 122     echo '#define EXIM_BUILD_DATE_OVERRIDE "'"${exim_build_date_override}"'"'
 123   fi
 124 ) >version.h
 125 fi
 126
 127 #test -t 1 && echo ">>> version $EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"