From d4cf5a864408773c36fc0cb72d652096310146a1 Mon Sep 17 00:00:00 2001
From: Alvaro Livraghi <a.livraghi@sirti.it>
Date: Wed, 25 Mar 2026 15:02:59 +0100
Subject: [PATCH] AVRO-4239: fix Perl porting's lack of version number

---
 lang/perl/MANIFEST    |  1 +
 lang/perl/Makefile.PL | 16 ++++++++++++++--
 lang/perl/build.sh    |  6 +++++-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/lang/perl/MANIFEST b/lang/perl/MANIFEST
index 0674514797f..61bbe3c633f 100644
--- a/lang/perl/MANIFEST
+++ b/lang/perl/MANIFEST
@@ -40,6 +40,7 @@ META.yml
 LICENSE
 NOTICE
 README
+VERSION.txt
 t/00_compile.t
 t/01_names.t
 t/01_schema.t
diff --git a/lang/perl/Makefile.PL b/lang/perl/Makefile.PL
index 5da5e215423..4c07baac00e 100644
--- a/lang/perl/Makefile.PL
+++ b/lang/perl/Makefile.PL
@@ -19,7 +19,14 @@ use Config;
 use inc::Module::Install;
 
 my $version;
-$version = `cat ../../share/VERSION.txt`;
+# We need to have VERSION.txt file in place to allow Avro.pm to get the version from it, 
+# but VERSION.txt has to be copied from ../../share/VERSION.txt.
+# If we are in a cpan* installation we expect VERSION.txt to be already in place, 
+# but if we are in a git clone it won't be there, so we need to copy it.
+unless (-f 'VERSION.txt') {
+    `cp -vf ../../share/VERSION.txt ./`;
+}
+$version = `cat VERSION.txt`;
 chomp $version;
 
 license 'apache';
@@ -67,4 +74,9 @@ my %packages = (
 my %provides = map { $_ => { file => $packages{$_}, version => $version } } keys %packages;
 provides(%provides);
 
-WriteMakefile(PM_FILTER => "sed -e 's/\+\+MODULE_VERSION\+\+/$version/'");
+WriteMakefile(
+    PM_FILTER => "sed -e 's/\+\+MODULE_VERSION\+\+/$version/'",
+    realclean => {
+        FILES => "VERSION.txt" # can be removed on realclean
+    }
+);
diff --git a/lang/perl/build.sh b/lang/perl/build.sh
index e7634dbabab..fa984f389cd 100755
--- a/lang/perl/build.sh
+++ b/lang/perl/build.sh
@@ -58,7 +58,11 @@ case "$target" in
     ;;
 
   dist)
-    perl ./Makefile.PL && make dist
+    # The dist target is used to create a distribution tarball that can be uploaded to CPAN, 
+    # so we need to add VERSION.txt to the tarball to make it available to Makefile.PL
+    cp -vf ../../share/VERSION.txt ./ && \
+        perl ./Makefile.PL && make dist && \
+        rm -vf ./VERSION.txt
     ;;
 
   clean)