Import Debian changes 4.92-8+deb10u3
[hcoop/debian/exim4.git] / 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 echo ">>> version $EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"
128 echo