A git-only SBCL workflow

[sbcl.git] / generate-version.sh

diff --git a/generate-version.sh b/generate-version.sh
new file mode 100755 (executable)
index 0000000..bfd7f1c
--- /dev/null
+++ b/generate-version.sh
@@ -0,0 +1,72 @@
+#!/bin/sh
+# Not a shell script, but something intended to be sourced from shell scripts
+git_available_p() {
+    # Check that (1) we have git (2) this is a git tree.
+    (which git >/dev/null 2>/dev/null && git describe >/dev/null 2>/dev/null)
+}
+
+generate_version() {
+    if ([ -f version.lisp-expr ] && ! git_available_p)
+    then
+        # Relase tarball, leave version.lisp-expr alone.
+        return
+    elif ! git_available_p
+    then
+        echo "Can't run 'git describe' 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
+        echo "    \$ echo '\"1.0.99.999\"' > version.lisp-expr" >&2
+        exit 1
+    fi
+    # Build it.
+    version_head=$(git rev-parse HEAD)
+    if [ -z "$SBCL_BUILDING_RELEASE_FROM" ]
+    then
+        version_root="origin/master"
+    else
+        version_root="$SBCL_BUILDING_RELEASE_FROM"
+    fi
+    version_base=$(git rev-parse "$version_root")
+    version_tag=`git describe --tags --match="sbcl*" --abbrev=0 $version_base`
+    version_release=`echo $version_tag | sed -e 's/sbcl[_-]//' | sed -e 's/_/\./g'`
+    version_n_root=`git rev-list $version_base --not $version_tag --count`
+    version_n_branch=`git rev-list HEAD --not $version_base --count`
+    if [ -z "$NO_GIT_HASH_IN_VERSION" ]
+    then
+        version_hash="-`git rev-parse --short $version_head`"
+    else
+        version_hash=""
+    fi
+    if git diff HEAD --no-ext-diff --quiet --exit-code
+    then
+        version_dirty=""
+    else
+        version_dirty="-dirty"
+    fi
+    # Now that we have all the pieces, put them together.
+    cat >version.lisp-expr <<EOF
+;;; This file is auto-generated using generate-version.sh. Every time
+;;; you re-run make.sh, this file will be overwritten if you are
+;;; working from a Git checkout.
+EOF
+    if [ "$version_base" = "$version_head" ]
+    then
+        if [ "0" = "$version_n_root" ]
+        then
+            printf "\"%s%s\"\n" \
+                $version_release $version_dirty >>version.lisp-expr
+        else
+            printf "\"%s.%s%s%s\"\n" \
+                $version_release $version_n_root \
+                $version_hash $version_dirty >>version.lisp-expr
+        fi
+    else
+        echo "base=$version_base"
+        echo "head=$version_head"
+        version_branchname=`git describe --contains --all HEAD`
+        printf "\"%s.%s.%s.%s%s%s\"\n" \
+            $version_release $version_n_root \
+            $version_branchname $version_n_branch \
+            $version_hash $version_dirty >>version.lisp-expr
+    fi
+}