From 3335ff742493c44ec3bed96778441cc9561044f0 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Fri, 19 Mar 2010 19:49:42 +1100
Subject: build: added SUBST_VARS_RECURSIVE()

---
 buildtools/wafsamba/samba_utils.py | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/buildtools/wafsamba/samba_utils.py b/buildtools/wafsamba/samba_utils.py
index cb055043a7..7c0f4644ab 100644
--- a/buildtools/wafsamba/samba_utils.py
+++ b/buildtools/wafsamba/samba_utils.py
@@ -298,14 +298,23 @@ def mkdir_p(dir):
     os.mkdir(dir)
 
 
+def SUBST_VARS_RECURSIVE(string, env):
+    '''recursively expand variables'''
+    if string is None:
+        return string
+    limit=100
+    while (string.find('${') != -1 and limit > 0):
+        string = Utils.subst_vars(string, env)
+        limit -= 1
+    return string
+
+
 def RUN_COMMAND(cmd,
                 env=None,
                 shell=False):
     '''run a external command, return exit code or signal'''
-    # recursively expand variables
     if env:
-        while cmd.find('${') != -1:
-            cmd = Utils.subst_vars(cmd, env)
+        cmd = SUBST_VARS_RECURSIVE(cmd, env)
 
     status = os.system(cmd)
     if os.WIFEXITED(status):
-- 
cgit