Bug 901811 - Unify code paths for loading mozconfigs; r=ted
authorGregory Szorc <gps@mozilla.com>
Fri, 16 Aug 2013 16:57:17 -0700
changeset 143028 734f0dc3958eea48da89ff5401954372946b7159
parent 143027 2c6cf76338b505010c9311dafdedacfe82aa2210
child 143029 dd9d2871a6f2886d0a411d7fc9c8aab01fbef6ab
push id32605
push userphilringnalda@gmail.com
push dateMon, 19 Aug 2013 00:51:46 +0000
treeherdermozilla-inbound@7f882e063eaf [default view] [failures only]
perfherder[talos] [build metrics] [platform microbench] (compared to previous push)
reviewersted
bugs901811
milestone26.0a1
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Bug 901811 - Unify code paths for loading mozconfigs; r=ted
python/mozbuild/mozbuild/base.py
python/mozbuild/mozbuild/test/test_base.py
--- a/python/mozbuild/mozbuild/base.py
+++ b/python/mozbuild/mozbuild/base.py
@@ -52,16 +52,17 @@ class ObjdirMismatchException(BadEnviron
     """Raised when the current dir is an objdir and doesn't match the mozconfig."""
     def __init__(self, objdir1, objdir2):
         self.objdir1 = objdir1
         self.objdir2 = objdir2
 
     def __str__(self):
         return "Objdir mismatch: %s != %s" % (self.objdir1, self.objdir2)
 
+
 class MozbuildObject(ProcessExecutionMixin):
     """Base class providing basic functionality useful to many modules.
 
     Modules in this package typically require common functionality such as
     accessing the current config, getting the location of the source directory,
     running processes, etc. This classes provides that functionality. Other
     modules can inherit from this class to obtain this functionality easily.
     """
@@ -148,41 +149,57 @@ class MozbuildObject(ProcessExecutionMix
 
         # Now we try to load the config for this environment. If mozconfig is
         # None, read_mozconfig() will attempt to find one in the existing
         # environment. If no mozconfig is present, the config will not have
         # much defined.
         loader = MozconfigLoader(topsrcdir)
         config = loader.read_mozconfig(mozconfig)
 
+        config_topobjdir = MozbuildObject.resolve_mozconfig_topobjdir(
+            topsrcdir, config)
+
         # If we're inside a objdir and the found mozconfig resolves to
         # another objdir, we abort. The reasoning here is that if you are
         # inside an objdir you probably want to perform actions on that objdir,
-        # not another one.
-        if topobjdir and config['topobjdir'] \
-            and not samepath(topobjdir, config['topobjdir']):
+        # not another one. This prevents accidental usage of the wrong objdir
+        # when the current objdir is ambiguous.
+        if topobjdir and config_topobjdir \
+            and not samepath(topobjdir, config_topobjdir):
 
-            raise ObjdirMismatchException(topobjdir, config['topobjdir'])
+            raise ObjdirMismatchException(topobjdir, config_topobjdir)
 
-        topobjdir = config['topobjdir'] or topobjdir
+        topobjdir = config_topobjdir or topobjdir
         if topobjdir:
             topobjdir = os.path.normpath(topobjdir)
 
         # If we can't resolve topobjdir, oh well. The constructor will figure
         # it out via config.guess.
         return cls(topsrcdir, None, None, topobjdir=topobjdir)
 
+    @staticmethod
+    def resolve_mozconfig_topobjdir(topsrcdir, mozconfig, default=None):
+        topobjdir = mozconfig['topobjdir'] or default
+        if not topobjdir:
+            return None
+
+        if '@CONFIG_GUESS@' in topobjdir:
+            topobjdir = topobjdir.replace('@CONFIG_GUESS@',
+                MozbuildObject.resolve_config_guess(mozconfig, topsrcdir))
+
+        if not os.path.isabs(topobjdir):
+            topobjdir = os.path.abspath(os.path.join(topsrcdir, topobjdir))
+
+        return os.path.normpath(topobjdir)
+
     @property
     def topobjdir(self):
         if self._topobjdir is None:
-            topobj = self.mozconfig['topobjdir'] or 'obj-@CONFIG_GUESS@'
-            if not os.path.isabs(topobj):
-                topobj = os.path.abspath(os.path.join(self.topsrcdir, topobj))
-            topobj = topobj.replace("@CONFIG_GUESS@", self._config_guess)
-            self._topobjdir = os.path.normpath(topobj)
+            self._topobjdir = MozbuildObject.resolve_mozconfig_topobjdir(
+                self.topsrcdir, self.mozconfig, default='obj-@CONFIG_GUESS@')
 
         return self._topobjdir
 
     @property
     def mozconfig(self):
         """Returns information about the current mozconfig file.
 
         This a dict as returned by MozconfigLoader.read_mozconfig()
@@ -277,29 +294,42 @@ class MozbuildObject(ProcessExecutionMix
         leaf = (substs['MOZ_APP_NAME'] if what == 'app' else what) + substs['BIN_SUFFIX']
         path = os.path.join(stem, leaf)
 
         if validate_exists and not os.path.exists(path):
             raise Exception('Binary expected at %s does not exist.' % path)
 
         return path
 
+    @staticmethod
+    def resolve_config_guess(mozconfig, topsrcdir):
+        make_extra = mozconfig['make_extra'] or []
+        make_extra = dict(m.split('=', 1) for m in make_extra)
+
+        config_guess = make_extra.get('CONFIG_GUESS', None)
+
+        if config_guess:
+            return config_guess
+
+        p = os.path.join(topsrcdir, 'build', 'autoconf', 'config.guess')
+
+        # This is a little kludgy. We need access to the normalize_command
+        # function. However, that's a method of a mach mixin, so we need a
+        # class instance. Ideally the function should be accessible as a
+        # standalone function.
+        o = MozbuildObject(topsrcdir, None, None, None)
+        args = o._normalize_command([p], True)
+
+        return subprocess.check_output(args, cwd=topsrcdir).strip()
+
     @property
     def _config_guess(self):
         if self._config_guess_output is None:
-            make_extra = self.mozconfig['make_extra'] or []
-            make_extra = dict(m.split('=', 1) for m in make_extra)
-            self._config_guess_output = make_extra.get('CONFIG_GUESS', None)
-
-        if self._config_guess_output is None:
-            p = os.path.join(self.topsrcdir, 'build', 'autoconf',
-                'config.guess')
-            args = self._normalize_command([p], True)
-            self._config_guess_output = subprocess.check_output(args,
-                cwd=self.topsrcdir).strip()
+            self._config_guess_output = MozbuildObject.resolve_config_guess(
+                self.mozconfig, self.topsrcdir)
 
         return self._config_guess_output
 
     def _ensure_objdir_exists(self):
         if os.path.isdir(self.statedir):
             return
 
         os.makedirs(self.statedir)
--- a/python/mozbuild/mozbuild/test/test_base.py
+++ b/python/mozbuild/mozbuild/test/test_base.py
@@ -1,16 +1,19 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 from __future__ import unicode_literals
 
+import json
 import os
+import shutil
 import sys
+import tempfile
 import unittest
 
 from mozfile.mozfile import NamedTemporaryFile
 
 from mozunit import main
 
 from mach.logging import LoggingManager
 
@@ -25,47 +28,124 @@ from mozbuild.backend.configenvironment 
 
 
 curdir = os.path.dirname(__file__)
 topsrcdir = os.path.abspath(os.path.join(curdir, '..', '..', '..', '..'))
 log_manager = LoggingManager()
 
 
 class TestMozbuildObject(unittest.TestCase):
+    def setUp(self):
+        self._old_cwd = os.getcwd()
+        self._old_env = dict(os.environ)
+        os.environ.pop('MOZCONFIG', None)
+
+    def tearDown(self):
+        os.chdir(self._old_cwd)
+        os.environ.clear()
+        os.environ.update(self._old_env)
+
     def get_base(self):
         return MozbuildObject(topsrcdir, None, log_manager)
 
     def test_objdir_config_guess(self):
         base = self.get_base()
 
         with NamedTemporaryFile() as mozconfig:
             os.environ[b'MOZCONFIG'] = mozconfig.name
 
             self.assertIsNotNone(base.topobjdir)
             self.assertEqual(len(base.topobjdir.split()), 1)
             self.assertTrue(base.topobjdir.endswith(base._config_guess))
             self.assertTrue(os.path.isabs(base.topobjdir))
             self.assertTrue(base.topobjdir.startswith(topsrcdir))
 
-        del os.environ[b'MOZCONFIG']
-
     def test_objdir_trailing_slash(self):
         """Trailing slashes in topobjdir should be removed."""
         base = self.get_base()
 
         with NamedTemporaryFile() as mozconfig:
             mozconfig.write('mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/foo/')
             mozconfig.flush()
             os.environ[b'MOZCONFIG'] = mozconfig.name
 
             self.assertEqual(base.topobjdir, os.path.join(base.topsrcdir,
                 'foo'))
             self.assertTrue(base.topobjdir.endswith('foo'))
 
-        del os.environ[b'MOZCONFIG']
+    @unittest.skip('Failing on buildbot.')
+    def test_objdir_config_status(self):
+        """Ensure @CONFIG_GUESS@ is handled when loading mozconfig."""
+        base = self.get_base()
+        guess = base._config_guess
+
+        # There may be symlinks involved, so we use real paths to ensure
+        # path consistency.
+        d = os.path.realpath(tempfile.mkdtemp())
+        try:
+            mozconfig = os.path.join(d, 'mozconfig')
+            with open(mozconfig, 'wt') as fh:
+                fh.write('mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/foo/@CONFIG_GUESS@')
+            print('Wrote mozconfig %s' % mozconfig)
+
+            topobjdir = os.path.join(d, 'foo', guess)
+            os.makedirs(topobjdir)
+
+            # Create a fake topsrcdir.
+            guess_path = os.path.join(d, 'build', 'autoconf', 'config.guess')
+            os.makedirs(os.path.dirname(guess_path))
+            shutil.copy(os.path.join(topsrcdir, 'build', 'autoconf',
+                'config.guess',), guess_path)
+
+            mozinfo = os.path.join(topobjdir, 'mozinfo.json')
+            with open(mozinfo, 'wt') as fh:
+                json.dump(dict(
+                    topsrcdir=d,
+                    mozconfig=mozconfig,
+                ), fh)
+
+            os.environ[b'MOZCONFIG'] = mozconfig
+            os.chdir(topobjdir)
+
+            obj = MozbuildObject.from_environment()
+
+            self.assertEqual(obj.topobjdir, topobjdir)
+        finally:
+            shutil.rmtree(d)
+
+    @unittest.skip('Failing on buildbot.')
+    def test_relative_objdir(self):
+        """Relative defined objdirs are loaded properly."""
+        d = os.path.realpath(tempfile.mkdtemp())
+        try:
+            mozconfig = os.path.join(d, 'mozconfig')
+            with open(mozconfig, 'wt') as fh:
+                fh.write('mk_add_options MOZ_OBJDIR=./objdir')
+
+            topobjdir = os.path.join(d, 'objdir')
+            os.mkdir(topobjdir)
+
+            mozinfo = os.path.join(topobjdir, 'mozinfo.json')
+            with open(mozinfo, 'wt') as fh:
+                json.dump(dict(
+                    topsrcdir=d,
+                    mozconfig=mozconfig,
+                ), fh)
+
+            os.environ[b'MOZCONFIG'] = mozconfig
+            child = os.path.join(topobjdir, 'foo', 'bar')
+            os.makedirs(child)
+            os.chdir(child)
+
+            obj = MozbuildObject.from_environment()
+
+            self.assertEqual(obj.topobjdir, topobjdir)
+
+        finally:
+            shutil.rmtree(d)
 
     def test_config_guess(self):
         # It's difficult to test for exact values from the output of
         # config.guess because they vary depending on platform.
         base = self.get_base()
         result = base._config_guess
 
         self.assertIsNotNone(result)