wscript: fix git version generation for tarballs

wscript

@@ -23,13 +23,15 @@ from __future__ import print_function
 import os
 import shutil
 import sys
+import re
 
 from waflib import Logs, Options, TaskGen
 from waflib import Context
+from waflib import Scripting
 from waflib.Build import BuildContext, CleanContext, InstallContext, UninstallContext
 from waftoolchainflags import WafToolchainFlags
 
-APPNAME = 'LADI JACK'
+APPNAME = 'ladi-jack'
 JACK_VERSION_MAJOR = 2
 JACK_VERSION_MINOR = 23
 JACK_VERSION_PATCH = 0
@@ -749,21 +751,25 @@ def build_drivers(bld):
 
 
 def git_ver(self):
-    bld = self.generator.bld
-    header = self.outputs[0].abspath()
-    if os.access('./version.h', os.R_OK):
-        header = os.path.join(os.getcwd(), out, "version.h")
-        shutil.copy('./version.h', header)
-        data = open(header).read()
-        m = re.match(r'^#define GIT_VERSION "([^"]*)"$', data)
-        if m != None:
-            self.ver = m.group(1)
-            Logs.pprint('BLUE', "tarball from git revision " + self.ver)
-        else:
-            self.ver = "tarball"
-        return
+    if type(self) == Scripting.Dist:
+        header = "./version.h"
+        bld = self
+    else:
+        bld = self.generator.bld
+        header = self.outputs[0].abspath()
+        if os.access('./version.h', os.R_OK):
+            #header = os.path.join(os.getcwd(), out, "version.h")
+            shutil.copy('./version.h', header)
+            data = open(header).read()
+            m = re.match(r'^#define GIT_VERSION "([^"]*)"$', data)
+            if m != None:
+                self.ver = m.group(1)
+                Logs.pprint('BLUE', "tarball from git revision " + self.ver)
+            else:
+                self.ver = "tarball"
+            return
 
-    if bld.srcnode.find_node('.git'):
+    if os.access('./.git', os.R_OK):
         self.ver = bld.cmd_and_log("LANG= git rev-parse HEAD", quiet=Context.BOTH).splitlines()[0]
         if bld.cmd_and_log("LANG= git diff-index --name-only HEAD", quiet=Context.BOTH).splitlines():
             self.ver += "-dirty"
@@ -776,7 +782,6 @@ def git_ver(self):
     fi.write('#define GIT_VERSION "%s"\n' % self.ver)
     fi.close()
 
-
 def build(bld):
     bld(rule=git_ver, target='version.h', update_outputs=True, always=True, ext_out=['.h'])
     if not bld.variant and bld.env['BUILD_WITH_32_64']:
@@ -863,3 +868,6 @@ def build(bld):
 def mm_hook(self, node):
     """Alias .mm files to be compiled the same as .cpp files, gcc will do the right thing."""
     return self.create_compiled_task('cxx', node)
+
+def dist(ctx):
+    git_ver(ctx)