From 760c739e8fdf68efcaad8d27b28104c141502505 Mon Sep 17 00:00:00 2001
From: giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8>
Date: Mon, 10 Jul 2023 21:46:22 +0000
Subject: Add COMPILED_BY environment variable

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4566 9d0c8265-081b-0410-96cb-a4ca84ce46f8
---
 buildtools/stamp-date | 16 ++++++++++++----
 doc/HISTORY           |  4 ++++
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/buildtools/stamp-date b/buildtools/stamp-date
index f867416d..baeec3fd 100755
--- a/buildtools/stamp-date
+++ b/buildtools/stamp-date
@@ -12,6 +12,11 @@
 # SOURCE_DATE_EPOCH is an environment variable as described here:
 # https://reproducible-builds.org/specs/source-date-epoch/ on 2017.03.16.
 
+# COMPILED_BY is a similar environment variable whose value is some
+# description of who is doing the build.  If it is not set, we use the
+# value of LOGNAME; if that is not set, we use the value of User; if that
+# is not set, we use the output of program 'whoami'.
+
 SOURCE_DATE_OR_NONE=${SOURCE_DATE_EPOCH:-NONE}
 
 NOW_FROM_DATE_PGM=$(date +%s)
@@ -24,9 +29,12 @@ else
 fi
 
 LOGNAME_OR_UNKNOWN=${LOGNAME:-UNKNOWN}
-USER=${USER:-$LOGNAME_OR_UNKNOWN}
-if [ "$USER" = "UNKNOWN" ]; then
-    USER=$(whoami)
+USER_OR_UNKNOWN=${USER:-$LOGNAME_OR_UNKNOWN}
+COMPILED_BY_OR_UNKNOWN=${COMPILED_BY:-$USER_OR_UNKNOWN}
+if [ "$COMPILED_BY_OR_UNKNOWN" = "UNKNOWN" ]; then
+    COMPILED_BY=$(whoami)
+else
+    COMPILED_BY=$COMPILED_BY_OR_UNKNOWN
 fi
 
 echo "/* This file tells some facts about the building of the package */"
@@ -36,4 +44,4 @@ if [ "$SOURCE_DATE_OR_NONE" != "NONE" ]; then
   echo "#define SOURCE_DATETIME $SOURCE_DATE_OR_NONE"
 fi
 echo "#define BUILD_DATETIME $BUILD_DATETIME"
-echo "#define COMPILED_BY \"$USER\""
+echo "#define COMPILED_BY \"$COMPILED_BY\""
diff --git a/doc/HISTORY b/doc/HISTORY
index 88f59c56..35aeb6fe 100644
--- a/doc/HISTORY
+++ b/doc/HISTORY
@@ -8,6 +8,10 @@ not yet  BJH  Release 11.04.00
 
               g3topbm: Add -correctlong
 
+              build: add COMPILED_BY environment variable to control the
+              "compiled by" value from --version common option.  This helps
+              with creating reproducible builds.
+
 23.06.28 BJH  Release 11.03.00
 
               pamstack: Add -firstmaxval, -lcmmaxval
-- 
cgit 1.4.1