# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1519879432 28800
# Node ID 957f7c9727153a9e23fad3dd4f8d05ab31b581cb
# Parent  6ab1299c10589041c66a4b5b1efe4f9f7373221f
chef: Support special tokens in the `chef/env` setting.

diff -r 6ab1299c1058 -r 957f7c972715 piecrust/main.py
--- a/piecrust/main.py	Wed Feb 28 20:20:48 2018 -0800
+++ b/piecrust/main.py	Wed Feb 28 20:43:52 2018 -0800
@@ -246,7 +246,12 @@
     return cache_key
 
 
-def _setup_app_environment(env):
+def _setup_app_environment(app, env):
+    from piecrust.uriutil import multi_replace
+
+    tokens = {
+        '%root_dir%': app.root_dir}
+
     for k, v in env.items():
         varname = k
         append = False
@@ -257,6 +262,8 @@
             varname = k[:-1]
             append = True
 
+        v = multi_replace(v, tokens)
+
         if append:
             logger.debug("Env: $%s += %s" % (varname, v))
             os.environ[varname] += v
@@ -337,7 +344,7 @@
     # Do any custom setup the user wants.
     custom_env = app.config.get('chef/env')
     if custom_env:
-        _setup_app_environment(custom_env)
+        _setup_app_environment(app, custom_env)
 
     # Add some timing information.
     if app.env: