sb-posix: make SYSCALL-ERROR's argument optional

[sbcl.git] / generate-version.sh

diff --git a/generate-version.sh b/generate-version.sh
index bfd7f1c..7bff065 100755 (executable)
--- a/generate-version.sh
+++ b/generate-version.sh
@@ -2,15 +2,30 @@
 # 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)
+    if ( which git >/dev/null 2>/dev/null && git describe >/dev/null 2>/dev/null )
+    then
+        # Check that some of the newer git versions we use are supported.
+        if [ "0" != `git rev-list HEAD --not HEAD --count 2> /dev/null` ]
+        then
+            echo "Too old a git installation."
+            echo
+            echo "Your git doesn't support --count option with git rev-list,"
+            echo "which SBCL build requires. Git 1.7.2 or later should work."
+            exit 1
+        else
+            true
+        fi
+    else
+        false
+    fi
 }
 
 generate_version() {
-    if ([ -f version.lisp-expr ] && ! git_available_p)
+    if [ -f version.lisp-expr -a ! git_available_p ]
     then
         # Relase tarball, leave version.lisp-expr alone.
         return
-    elif ! git_available_p
+    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
@@ -19,14 +34,14 @@ generate_version() {
         exit 1
     fi
     # Build it.
-    version_head=$(git rev-parse HEAD)
+    version_head=`git rev-parse HEAD`
     if [ -z "$SBCL_BUILDING_RELEASE_FROM" ]
     then
         version_root="origin/master"
     else
         version_root="$SBCL_BUILDING_RELEASE_FROM"
     fi
-    version_base=$(git rev-parse "$version_root")
+    version_base=`git rev-parse "$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`