src/common/gen-version-i.sh

   1 #!/usr/bin/env sh
   2 #
   3 # SPDX-License-Identifier: GPL-2.0-only
   4 #
   5 # Copyright (C) 2023 EfficiOS, Inc.
   6
   7 # This file generates an include file that contains the git version
   8 # string of the current branch, it must be continuously updated when
   9 # we build in the git repo and shipped in dist tarballs to reflect the
  10 # status of the tree when it was generated. If the tree is clean and
  11 # the current commit is a tag starting with "v", consider this a
  12 # release version and set an empty git version.
  13
  14 set -o nounset
  15
  16 if test "${TOP_SRCDIR:-}" = ""; then
  17         echo "$0: TOP_SRCDIR is not set" >&2
  18         exit 1
  19 fi
  20
  21 GREP=${GREP:-grep}
  22 SED=${SED:-sed}
  23
  24 # Delete any stale "version.i.tmp" file.
  25 rm -f version.i.tmp
  26
  27 if (test ! -f version.i && test -f "$TOP_SRCDIR/include/version.i"); then
  28         cp "$TOP_SRCDIR/include/version.i" version.i
  29 fi
  30
  31 # If "bootstrap" and ".git" exists in the top source directory and the git
  32 # executable is available, get the current git version string in the form:
  33 #
  34 #  "latest_tag"(-"number_of_commits_on_top")(-g"latest_commit_hash")(-dirty)
  35 #
  36 # And store it in "version.i.tmp", if the current commit is tagged, the tag
  37 # starts with "v" and the tree is clean, consider this a release version and
  38 # overwrite the git version with an empty string in "version.i.tmp".
  39 if (test -r "$TOP_SRCDIR/bootstrap" && test -r "$TOP_SRCDIR/.git") &&
  40                 test -x "`which git 2>&1;true`"; then
  41         GIT_VERSION_STR="`cd "$TOP_SRCDIR" && git describe --tags --dirty`"
  42         GIT_CURRENT_TAG="`cd "$TOP_SRCDIR" && git describe --tags --exact-match --match="v[0-9]*" HEAD || true 2> /dev/null`"
  43         echo "#define BT_VERSION_GIT \"$GIT_VERSION_STR\"" > version.i.tmp
  44
  45         if ! $GREP -- "-dirty" version.i.tmp > /dev/null &&
  46                         test "x$GIT_CURRENT_TAG" != "x"; then
  47                 echo "#define BT_VERSION_GIT \"\"" > version.i.tmp
  48         fi
  49 fi
  50
  51 # If we don't have a "version.i.tmp" nor a "version.i", generate an empty
  52 # string as a failover. If a "version.i" is present, for example when building
  53 # from a distribution tarball, get the git_version using grep.
  54 if test ! -f version.i.tmp; then
  55         if test -f version.i; then
  56                 $GREP "^#define \bBT_VERSION_GIT\b.*" version.i > version.i.tmp
  57         else
  58                 echo '#define BT_VERSION_GIT ""' > version.i.tmp
  59         fi
  60 fi
  61
  62 # Fetch the BT_VERSION_EXTRA_NAME define from "version/extra_version_name" and output it
  63 # to "version.i.tmp".
  64 echo "#define BT_VERSION_EXTRA_NAME \"`$SED -n '1p' "$TOP_SRCDIR/version/extra_version_name" 2> /dev/null`\"" >> version.i.tmp
  65
  66 # Fetch the BT_VERSION_EXTRA_DESCRIPTION define from "version/extra_version_description",
  67 # sanitize and format it with a sed script to replace all non-alpha-numeric values
  68 # with "-" and join all lines by replacing "\n" with litteral string c-style "\n" and
  69 # output it to "version.i.tmp".
  70 echo "#define BT_VERSION_EXTRA_DESCRIPTION \"`$SED -E ':a ; N ; $!ba ; s/[^a-zA-Z0-9 \n\t\.,]/-/g ; s/\r{0,1}\n/\\\n/g' "$TOP_SRCDIR/version/extra_version_description" 2> /dev/null`\"" >> version.i.tmp
  71
  72 # Repeat the same logic for the "version/extra_patches" directory.
  73 # Data fetched from "version/extra_patches" must be sanitized and
  74 # formatted.
  75 # The data is fetched using "ls" with an ignore pattern for the README.adoc file.
  76 # The sanitize step uses sed with a script to replace all
  77 # non-alpha-numeric values, except " " (space), to "-".
  78 # The formatting step uses sed with a script to join all lines
  79 # by replacing "\n" with litteral string c-style "\n".
  80 echo "#define BT_VERSION_EXTRA_PATCHES \"`ls -1 "$TOP_SRCDIR/version/extra_patches" | $GREP -v '^README.adoc' | $SED -E ':a ; N ; $!ba ; s/[^a-zA-Z0-9 \n\t\.]/-/g ; s/\r{0,1}\n/\\\n/g' 2> /dev/null`\"" >> version.i.tmp
  81
  82 # If we don't have a "version.i" or we have both files (version.i, version.i.tmp)
  83 # and they are different, copy "version.i.tmp" over "version.i".
  84 # This way the dependent targets are only rebuilt when the git version
  85 # string or either one of extra version string change.
  86 if test ! -f version.i ||
  87                 test x"`cat version.i.tmp`" != x"`cat version.i`"; then
  88         mv version.i.tmp version.i
  89 fi
  90
  91 rm -f version.i.tmp