[PATCH 0/2] reproducible builds

[Alexander Couzens]

Hi,

here are two patches which makes reproducible builds possible.

Best,
lynxis

Alexander Couzens (2):
  buildversion.sh: remove build hostname from version
  buildversion.h: use the last git commit as timestamp if available

scripts/buildversion.sh | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

[PATCH 1/2] buildversion.sh: remove build hostname from version

[Alexander Couzens]

It doesn't contain any useful information and
blocks reproducible builds.

Signed-off-by: Alexander Couzens 
---
 scripts/buildversion.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/buildversion.sh b/scripts/buildversion.sh
index e5ce96c..16c043f 100755
--- a/scripts/buildversion.sh
+++ b/scripts/buildversion.sh
@@ -11,7 +11,7 @@ elif [ -f .version ]; then
 else
     VERSION="?"
 fi
-VERSION="${VERSION}-`date +"%Y%m%d_%H%M%S"`-`hostname`"
+VERSION="${VERSION}-`date +"%Y%m%d_%H%M%S"`"
 echo "Version: ${VERSION}"

# Build header file

[PATCH 2/2] buildversion.h: use the last git commit as timestamp if available

[Alexander Couzens]

Additional set TZ=UTC to have predictable `date` output.

Signed-off-by: Alexander Couzens 
---
 scripts/buildversion.sh | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/scripts/buildversion.sh b/scripts/buildversion.sh
index 16c043f..f63b9a0 100755
--- a/scripts/buildversion.sh
+++ b/scripts/buildversion.sh
@@ -2,16 +2,18 @@
 # Script to generate a C file with version information.
 OUTFILE="$1"
 VAR16MODE="$2"
+DATE=$(date +%s)

# Extract version info
 if [ -d .git -o -f .git ]; then
-    VERSION="`git describe --tags --long --dirty`"
+    VERSION="$(git describe --tags --long --dirty)"
+    DATE="$(git log --date=local --pretty=format:%ct -1)"
 elif [ -f .version ]; then
-    VERSION="`cat .version`"
+    VERSION="$(cat .version)"
 else
     VERSION="?"
 fi
-VERSION="${VERSION}-`date +"%Y%m%d_%H%M%S"`"
+VERSION="${VERSION}-$(TZ=UTC date -d @$DATE +%Y%m%d_%H%M%S)"
 echo "Version: ${VERSION}"

# Build header file

[Kevin O'Connor]

On Sat, Mar 07, 2015 at 06:45:28PM +0100, Alexander Couzens wrote:
> Hi,
>
> here are two patches which makes reproducible builds possible.
>
> Best,
> lynxis

FYI, there was a thread on this just a few weeks ago:

http://www.seabios.org/pipermail/seabios/2015-February/008603.html

-Kevin