devtool: check that source tree still exists

Sometimes, particularly if you extracted the source to /tmp which is on
tmpfs, the external source tree that is being pointed to may no longer
exist when you come to run "devtool build" or "devtool update-recipe"
etc. Make all of the commands that need to check for a recipe being in
the workspace call a single function and have that function additionally
check the source tree still exists where appropriate.

(From OE-Core rev: 0c3f289576a2ab35b1d1d8854d6763553cc3bf09)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/devtool/build.py

@@ -21,7 +21,7 @@ import bb
 import logging
 import argparse
 import tempfile
-from devtool import exec_build_env_command, DevtoolError
+from devtool import exec_build_env_command, check_workspace_recipe, DevtoolError
 
 logger = logging.getLogger('devtool')
 
@@ -42,9 +42,7 @@ def _create_conf_file(values, conf_file=None):
 
 def build(args, config, basepath, workspace):
     """Entry point for the devtool 'build' subcommand"""
-    if not args.recipename in workspace:
-        raise DevtoolError("no recipe named %s in your workspace" %
-                           args.recipename)
+    check_workspace_recipe(workspace, args.recipename)
 
     build_task = config.get('Build', 'build_task', 'populate_sysroot')