Parse the Fannie config file to get lane definitions for rattail.conf

when deploying Corporal via fabric

corporal/fablib/corporal.py

@@ -3,13 +3,17 @@
 Fabric library for Corporal systems
 """
 
+import os
+import json
+
 from rattail_fabric2 import apache, postgresql, python, exists, mkdir
 
 from corporal.fablib import deploy_common
 
 
 def bootstrap_corporal_app(c, env, envname='corporal', user='rattail',
-                           port=7900, sitename=None, stage=False):
+                           port=7900, sitename=None, stage=False,
+                           coredir=None, lanes=None):
     """
     Create a virtual environment for use with a Corporal app.
     """
@@ -93,10 +97,14 @@ def bootstrap_corporal_app(c, env, envname='corporal', user='rattail',
     mkdir(c, '{}/data'.format(appdir), use_sudo=True, owner=user)
 
     # config / scripts
+    deploy_common(c, 'corporal/parse-fannie-config.php', '{}/parse-fannie-config.php'.format(appdir),
+                  use_sudo=True, owner=user)
+    if lanes is None:
+        lanes = parse_fannie_lanes(c, '{}/parse-fannie-config.php'.format(appdir), coredir)
     deploy_common(c, 'corporal/rattail.conf.mako', '{}/rattail.conf'.format(appdir),
                   use_sudo=True, owner=user, mode='0600', 
                   context={'env': env, 'envdir': envdir, 'dbname': dbname,
-                           'production': production})
+                           'production': production, 'lanes': lanes})
     if not exists(c, '{}/quiet.conf'.format(appdir)):
         c.sudo("bash -lc 'workon {} && cdvirtualenv app && rattail make-config -T quiet'".format(envname),
                user=user)
@@ -144,3 +152,20 @@ def bootstrap_corporal_app(c, env, envname='corporal', user='rattail',
                               enable=True,
                               context={'sitename': sitename, 'port': port})
     apache.restart(c)
+
+
+def parse_fannie_lanes(c, script, coredir):
+    """
+    Parse and return the CORE lane definitions from Fannie config file.
+    """
+    lanes = []
+    if coredir:
+        config = os.path.join(coredir, 'fannie', 'config.php')
+        if exists(c, config):
+            result = c.run('php {} --path {} --setting FANNIE_LANES'.format(script, config),
+                           hide=True)
+            lanes = json.loads(result.stdout)
+            for number, lane in enumerate(lanes, 1):
+                lane['number'] = number
+                lane['dbkey'] = 'lane{:02d}'.format(number)
+    return lanes

corporal/fablib/deploy/corporal/parse-fannie-config.php

@@ -0,0 +1,34 @@
+<?php
+
+$options = getopt('h', array(
+    'help',
+    'path:',
+    'setting:',
+));
+
+$help = isset($options['h']) or isset($options['help']);
+$path = isset($options['path']) ? $options['path'] : null;
+$setting = isset($options['setting']) ? $options['setting'] : null;
+
+if ($help or !$path or !$setting) {
+    $script = basename($argv[0]);
+    echo "Usage:  $script --path FANNIE_CONFIG_PATH --setting NAME_OF_SETTING\n";
+    exit($help ? 0 : 1);
+}
+
+if (!is_file(realpath($path))) {
+    echo "Config file does not exist: $path\n";
+    exit(2);
+}
+$path = realpath($path);
+include($path);
+
+if (!isset($$setting)) {
+    echo "Config file does not contain setting: $setting\n";
+    exit(3);
+}
+$value = $$setting;
+
+echo json_encode($value);
+
+?>

corporal/fablib/deploy/corporal/rattail.conf.mako

@@ -11,6 +11,13 @@
 default.url = mysql+mysqlconnector://${env.username_mysql_coreserver}:${env.password_mysql_coreserver}@localhost/core_op
 default.pool_recycle = 3600
 
+[corepos.db.lane_op]
+keys = ${', '.join([lane['dbkey'] for lane in lanes])}
+% for lane in lanes:
+
+${lane['dbkey']}.url = mysql+mysqlconnector://${lane['user']}:${lane['pw']}@${lane['host']}/${lane['op']}
+% endfor
+
 
 <%text>##############################</%text>
 # rattail