From 40f03fb663090c2387db8d0a349d0301e1aea8ce Mon Sep 17 00:00:00 2001
From: Stas Boukarev <stassats@gmail.com>
Date: Sat, 31 Aug 2024 19:25:42 +0300
Subject: [PATCH] Allow building from git-archive

---
 .git-archive-version |  1 +
 .gitattributes       |  1 +
 generate-version.sh  | 12 ++++++++++++
 3 files changed, 14 insertions(+)
 create mode 100644 .git-archive-version

diff --git a/.git-archive-version b/.git-archive-version
new file mode 100644
index 000000000..f4034a5d2
--- /dev/null
+++ b/.git-archive-version
@@ -0,0 +1 @@
+$Format:%(describe)$
diff --git a/.gitattributes b/.gitattributes
index fcadb2cf9..ff7dbbf26 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,2 @@
 * text eol=lf
+.git-archive-version export-subst 
diff --git a/generate-version.sh b/generate-version.sh
index 6d1fe9996..52e4d6917 100755
--- a/generate-version.sh
+++ b/generate-version.sh
@@ -18,6 +18,18 @@ then
     exit 0
 elif [ -z "$AVAILABLE" ]
 then
+    if grep -q "sbcl-" .git-archive-version > /dev/null 2>&1
+    then
+        cat >version.lisp-expr <<EOF
+;;; This file is auto-generated using generate-version.sh. Every time
+;;; you re-run make.sh, this file will be overwritten if you are
+;;; working from a Git checkout.
+EOF
+        VERSION=`cat .git-archive-version | sed -e 's/sbcl[_-]//' | sed -e 's/_/\./g'`
+        printf "\"%s\"\n" $VERSION >> version.lisp-expr
+        exit 0
+    fi
+    
     echo "Can't 'git describe' SBCL source and version.lisp-expr is missing." >&2
     echo "To fix this, either install git or create a fake version.lisp-expr file." >&2
     echo "You can create a fake version.lisp-expr file like this:" >&2