From fd6c16c345160a7728e0609788d76d36dcbb3fd7 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 8 Apr 2024 17:14:35 +0200
Subject: [PATCH] release-tools.sh: store the timestamp and release tag too

When maketgz invokes this script to generate the docs/RELEASE-TOOLS.md
file that gets bundled in the release, it now also passes on the exact
timestamp and version number so that those details also get mentioned in
the document. They will help users reproduce an identical tarball.

Closes #13319
---
 maketgz                  |  2 +-
 scripts/release-tools.sh | 12 +++++++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/maketgz b/maketgz
index c2c359aafa..1824ff7f88 100755
--- a/maketgz
+++ b/maketgz
@@ -168,7 +168,7 @@ echo "produce CHANGES"
 git log --pretty=fuller --no-color --date=short --decorate=full -1000 | ./scripts/log2changes.pl > CHANGES.dist
 
 echo "produce RELEASE-TOOLS.md"
-./scripts/release-tools.sh > docs/RELEASE-TOOLS.md.dist
+./scripts/release-tools.sh "$timestamp" "$version" > docs/RELEASE-TOOLS.md.dist
 
 ############################################################################
 #
diff --git a/scripts/release-tools.sh b/scripts/release-tools.sh
index 57c8c2fb01..86cde74902 100755
--- a/scripts/release-tools.sh
+++ b/scripts/release-tools.sh
@@ -25,8 +25,13 @@
 
 set -eu
 
+# this should ideally be passed in
+timestamp=${1:-unknown}
+version=${2:-unknown}
+tag=$(echo "curl-$version" | tr '.' '_')
+
 cat <<MOO
-# Release tools
+# Release tools used for curl $version
 
 The following tools and their Debian package version numbers were used to
 produce this release tarball.
@@ -53,7 +58,7 @@ cat <<MOO
 
 # Reproduce the tarball
 
-- Clone the repo and checkout the release tag
+- Clone the repo and checkout the tag: $tag
 - Install the same set of tools + versions as listed above
 
 ## Do a standard build
@@ -62,8 +67,9 @@ cat <<MOO
 - ./configure [...]
 - make
 
-## Generate the tarball
+## Generate the tarball with the same timestamp
 
+- export SOURCE_DATE_EPOCH=$timestamp
 - ./maketgz [version]
 
 MOO