1 files changed, 41 insertions, 0 deletions
diff --git a/buildtools/wafsamba/configure_file.py b/buildtools/wafsamba/configure_file.py
new file mode 100644
index 0000000..98a58a4
--- /dev/null
+++ b/buildtools/wafsamba/configure_file.py
@@ -0,0 +1,41 @@
+# handle substitution of variables in .in files
+
+import sys
+import re
+import os
+from waflib import Build, Logs
+from samba_utils import SUBST_VARS_RECURSIVE
+
+def subst_at_vars(task):
+    '''substiture @VAR@ style variables in a file'''
+
+    env = task.env
+    s = task.inputs[0].read()
+
+    # split on the vars
+    a = re.split(r'(@\w+@)', s)
+    out = []
+    for v in a:
+        if re.match(r'@\w+@', v):
+            vname = v[1:-1]
+            if not vname in task.env and vname.upper() in task.env:
+                vname = vname.upper()
+            if not vname in task.env:
+                Logs.error("Unknown substitution %s in %s" % (v, task.name))
+                sys.exit(1)
+            v = SUBST_VARS_RECURSIVE(task.env[vname], task.env)
+        out.append(v)
+    contents = ''.join(out)
+    task.outputs[0].write(contents)
+    return 0
+
+def CONFIGURE_FILE(bld, in_file, **kwargs):
+    '''configure file'''
+
+    base=os.path.basename(in_file)
+    t = bld.SAMBA_GENERATOR('INFILE_%s' % base,
+                            rule = subst_at_vars,
+                            source = in_file + '.in',
+                            target = in_file,
+                            vars = kwargs)
+Build.BuildContext.CONFIGURE_FILE = CONFIGURE_FILE