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build: Allow to override build date with SOURCE_DATE_EPOCH

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and make host and user overridable
in order to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.

Also switch to UTC to be independent of timezone.
Also use ISO 8601 date format to be easier to parse.
This is similar to c9f4022783
and df82ec8fe7
which was lost in the move away from automake.

Note: This date call is designed to work with different flavors
of date (GNU, BSD and others).
If only GNU (Linux) support is needed, the patch can be simplified.

This PR was done while working on reproducible builds for openSUSE.

Type: fix

Change-Id: If4cab12320e6b5fcb1f2842fac5d745b33b01ed7
Signed-off-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
This commit is contained in:
Bernhard M. Wiedemann
2019-12-05 16:51:26 +01:00
committed by Damjan Marion
parent 62d9fda8e4
commit 3d14f03619
1 changed files with 8 additions and 3 deletions
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11
src/scripts/generate_version_h
View File

@ -1,4 +1,9 @@
#!/bin/bash
: ${VPP_BUILD_USER:=$(whoami)}
: ${VPP_BUILD_HOST:=$(hostname)}
DATE_FMT="+%Y-%m-%dT%H:%M:%S"
SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(date +%s)}"
VPP_BUILD_DATE=$(date -u -d "@$SOURCE_DATE_EPOCH" "$DATE_FMT" 2>/dev/null || date -u -r "$SOURCE_DATE_EPOCH" "$DATE_FMT" 2>/dev/null || date -u "$DATE_FMT")
cat > ${1} << __EOF__
/*
@ -19,9 +24,9 @@ cat > ${1} << __EOF__
#ifndef included_vpp_app_version_h
#define included_vpp_app_version_h
#define VPP_BUILD_DATE "$(date)"
#define VPP_BUILD_USER "$(whoami)"
#define VPP_BUILD_HOST "$(hostname)"
#define VPP_BUILD_DATE "$VPP_BUILD_DATE"
#define VPP_BUILD_USER "$VPP_BUILD_USER"
#define VPP_BUILD_HOST "$VPP_BUILD_HOST"
#define VPP_BUILD_TOPDIR "$(git rev-parse --show-toplevel 2> /dev/null)"
#define VPP_BUILD_VER "$(scripts/version)"
#endif