devtool: add: fix node.js/npm handling with recipe specific sysroots

The change over to recipe specific sysroots means that we can no longer
get a known location simply from configuration for the npm binary - we
need to get the recipe sysroot for nodejs-native, look there for npm if
we need to check it's present, and add that to PATH when calling out to
npm. Unfortunately this means anywhere we need to get that path we have
to have parsed all recipes, otherwise we have no reliable way of
resolving nodejs-native. Thus we have to change recipetool create to
always parse all recipes (the structure of the code does not allow us to
do this conditionally).

In the worst case, if npm hasn't already been added to its own sysroot
and we are fetching from a source repository rather than an npm
registry, this gets a bit ugly because we end up parsing recipes three
times:
1) recipetool startup, which then fetches the code and determines it's
   a node.js module, finds that npm isn't available and then exits with
   a specific error to tell devtool it needs to build npm
2) when we invoke bitbake -c addto_recipe_sysroot nodejs-native
3) when we re-invoke recipetool

This code is badly in need of refactoring, but now is unfortunately not
the time to do that, so we're going to have to live with this ugliness
for now.

Fixes [YOCTO #10992].

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

1 files changed, 22 insertions, 6 deletions

diff --git a/scripts/lib/recipetool/create.py b/scripts/lib/recipetool/create.py
index 648f2d66fc..439dca0fcc 100644
--- a/scripts/lib/recipetool/create.py
+++ b/scripts/lib/recipetool/create.py
@@ -416,12 +416,14 @@ def create_recipe(args):
             srcuri = rev_re.sub('', srcuri)
         tempsrc = tempfile.mkdtemp(prefix='recipetool-')
         srctree = tempsrc
+        d = bb.data.createCopy(tinfoil.config_data)
         if fetchuri.startswith('npm://'):
             # Check if npm is available
-            check_npm(tinfoil.config_data, args.devtool)
+            npm_bindir = check_npm(tinfoil, args.devtool)
+            d.prependVar('PATH', '%s:' % npm_bindir)
         logger.info('Fetching %s...' % srcuri)
         try:
-            checksums = scriptutils.fetch_uri(tinfoil.config_data, fetchuri, srctree, srcrev)
+            checksums = scriptutils.fetch_uri(d, fetchuri, srctree, srcrev)
         except bb.fetch2.BBFetchException as e:
             logger.error(str(e).rstrip())
             sys.exit(1)
@@ -1119,10 +1121,21 @@ def convert_rpm_xml(xmlfile):
     return values
 
 
-def check_npm(d, debugonly=False):
-    if not os.path.exists(os.path.join(d.getVar('STAGING_BINDIR_NATIVE'), 'npm')):
-        log_error_cond('npm required to process specified source, but npm is not available - you need to build nodejs-native first', debugonly)
+def check_npm(tinfoil, debugonly=False):
+    try:
+        rd = tinfoil.parse_recipe('nodejs-native')
+    except bb.providers.NoProvider:
+        # We still conditionally show the message and exit with the special
+        # return code, otherwise we can't show the proper message for eSDK
+        # users
+        log_error_cond('nodejs-native is required for npm but is not available - you will likely need to add a layer that provides nodejs', debugonly)
+        sys.exit(14)
+    bindir = rd.getVar('STAGING_BINDIR_NATIVE')
+    npmpath = os.path.join(bindir, 'npm')
+    if not os.path.exists(npmpath):
+        log_error_cond('npm required to process specified source, but npm is not available - you need to run bitbake -c addto_recipe_sysroot nodejs-native first', debugonly)
         sys.exit(14)
+    return bindir
 
 def register_commands(subparsers):
     parser_create = subparsers.add_parser('create',
@@ -1141,5 +1154,8 @@ def register_commands(subparsers):
     parser_create.add_argument('--keep-temp', action="store_true", help='Keep temporary directory (for debugging)')
     parser_create.add_argument('--fetch-dev', action="store_true", help='For npm, also fetch devDependencies')
     parser_create.add_argument('--devtool', action="store_true", help=argparse.SUPPRESS)
-    parser_create.set_defaults(func=create_recipe)
+    # FIXME I really hate having to set parserecipes for this, but given we may need
+    # to call into npm (and we don't know in advance if we will or not) and in order
+    # to do so we need to know npm's recipe sysroot path, there's not much alternative
+    parser_create.set_defaults(func=create_recipe, parserecipes=True)