The Python virtualenv tool sets up a few things in the environment, putting its path first in the PATH environment variable and setting up a sys.prefix different from the sys.base_prefix value.
At present buildman puts the toolchain path first in PATH so that it can be found easily during the build. For sandbox this causes problems since /usr/bin/gcc (for example) results in '/usr/bin' being prepended to the PATH variable. As a result, the venv is partially disabled.
The result is that sandbox builds within a venv ignore the venv, e.g. when looking for packages.
Correct this by detecting the venv and adding the toolchain path after the venv path.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Fix 'envronment' typo
tools/buildman/bsettings.py | 3 ++ tools/buildman/test.py | 83 +++++++++++++++++++++++++++++++++++++ tools/buildman/toolchain.py | 31 ++++++++++++-- 3 files changed, 113 insertions(+), 4 deletions(-)
diff --git a/tools/buildman/bsettings.py b/tools/buildman/bsettings.py index e225ac2ca0f..1be1d45e0fa 100644 --- a/tools/buildman/bsettings.py +++ b/tools/buildman/bsettings.py @@ -31,6 +31,9 @@ def setup(fname=''): def add_file(data): settings.readfp(io.StringIO(data))
+def add_section(name): + settings.add_section(name) + def get_items(section): """Get the items from a section of the config.
diff --git a/tools/buildman/test.py b/tools/buildman/test.py index f92add7a7c5..83219182fe0 100644 --- a/tools/buildman/test.py +++ b/tools/buildman/test.py @@ -146,6 +146,7 @@ class TestBuild(unittest.TestCase): self.toolchains.Add('arm-linux-gcc', test=False) self.toolchains.Add('sparc-linux-gcc', test=False) self.toolchains.Add('powerpc-linux-gcc', test=False) + self.toolchains.Add('/path/to/aarch64-linux-gcc', test=False) self.toolchains.Add('gcc', test=False)
# Avoid sending any output @@ -747,6 +748,88 @@ class TestBuild(unittest.TestCase): self.assertEqual([ ['MARY="mary"', 'Missing expected line: CONFIG_MARY="mary"']], result)
+ def call_make_environment(self, tchn, full_path, in_env=None): + """Call Toolchain.MakeEnvironment() and process the result + + Args: + tchn (Toolchain): Toolchain to use + full_path (bool): True to return the full path in CROSS_COMPILE + rather than adding it to the PATH variable + in_env (dict): Input environment to use, None to use current env + + Returns: + tuple: + dict: Changes that MakeEnvironment has made to the environment + key: Environment variable that was changed + value: New value (for PATH this only includes components + which were added) + str: Full value of the new PATH variable + """ + env = tchn.MakeEnvironment(full_path, env=in_env) + + # Get the original environment + orig_env = dict(os.environb if in_env is None else in_env) + orig_path = orig_env[b'PATH'].split(b':') + + # Find new variables + diff = dict((k, env[k]) for k in env if orig_env.get(k) != env[k]) + + # Find new / different path components + diff_path = None + new_path = None + if b'PATH' in diff: + new_path = diff[b'PATH'].split(b':') + diff_paths = [p for p in new_path if p not in orig_path] + diff_path = b':'.join(p for p in new_path if p not in orig_path) + if diff_path: + diff[b'PATH'] = diff_path + else: + del diff[b'PATH'] + return diff, new_path + + def test_toolchain_env(self): + """Test PATH and other environment settings for toolchains""" + # Use a toolchain which has a path, so that full_path makes a difference + tchn = self.toolchains.Select('aarch64') + + # Normal cases + diff = self.call_make_environment(tchn, full_path=False)[0] + self.assertEqual( + {b'CROSS_COMPILE': b'aarch64-linux-', b'LC_ALL': b'C', + b'PATH': b'/path/to'}, diff) + + diff = self.call_make_environment(tchn, full_path=True)[0] + self.assertEqual( + {b'CROSS_COMPILE': b'/path/to/aarch64-linux-', b'LC_ALL': b'C'}, + diff) + + # When overriding the toolchain, only LC_ALL should be set + tchn.override_toolchain = True + diff = self.call_make_environment(tchn, full_path=True)[0] + self.assertEqual({b'LC_ALL': b'C'}, diff) + + # Test that virtualenv is handled correctly + tchn.override_toolchain = False + sys.prefix = '/some/venv' + env = dict(os.environb) + env[b'PATH'] = b'/some/venv/bin:other/things' + tchn.path = '/my/path' + diff, diff_path = self.call_make_environment(tchn, False, env) + + self.assertIn(b'PATH', diff) + self.assertEqual([b'/some/venv/bin', b'/my/path', b'other/things'], + diff_path) + self.assertEqual( + {b'CROSS_COMPILE': b'aarch64-linux-', b'LC_ALL': b'C', + b'PATH': b'/my/path'}, diff) + + # Handle a toolchain wrapper + tchn.path = '' + bsettings.add_section('toolchain-wrapper') + bsettings.set_item('toolchain-wrapper', 'my-wrapper', 'fred') + diff = self.call_make_environment(tchn, full_path=True)[0] + self.assertEqual( + {b'CROSS_COMPILE': b'fred aarch64-linux-', b'LC_ALL': b'C'}, diff)
if __name__ == "__main__": unittest.main() diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py index 324ad0e0821..6ca79c2c0f9 100644 --- a/tools/buildman/toolchain.py +++ b/tools/buildman/toolchain.py @@ -172,13 +172,14 @@ class Toolchain: else: raise ValueError('Unknown arg to GetEnvArgs (%d)' % which)
- def MakeEnvironment(self, full_path): + def MakeEnvironment(self, full_path, env=None): """Returns an environment for using the toolchain.
This takes the current environment and adds CROSS_COMPILE so that the tool chain will operate correctly. This also disables localized output and possibly Unicode encoded output of all build tools by - adding LC_ALL=C. + adding LC_ALL=C. For the case where full_path is False, it prepends + the toolchain to PATH
Note that os.environb is used to obtain the environment, since in some cases the environment many contain non-ASCII characters and we see @@ -187,15 +188,21 @@ class Toolchain: UnicodeEncodeError: 'utf-8' codec can't encode characters in position 569-570: surrogates not allowed
+ When running inside a Python venv, care is taken not to put the + toolchain path before the venv path, so that builds initiated by + buildman will still respect the venv. + Args: full_path: Return the full path in CROSS_COMPILE and don't set PATH + env (dict of bytes): Original environment, used for testing Returns: Dict containing the (bytes) environment to use. This is based on the current environment, with changes as needed to CROSS_COMPILE, PATH and LC_ALL. """ - env = dict(os.environb) + env = dict(env or os.environb) + wrapper = self.GetWrapper()
if self.override_toolchain: @@ -206,7 +213,23 @@ class Toolchain: wrapper + os.path.join(self.path, self.cross)) else: env[b'CROSS_COMPILE'] = tools.to_bytes(wrapper + self.cross) - env[b'PATH'] = tools.to_bytes(self.path) + b':' + env[b'PATH'] + + # Detect a Python virtualenv and avoid defeating it + if sys.prefix != sys.base_prefix: + paths = env[b'PATH'].split(b':') + new_paths = [] + to_insert = tools.to_bytes(self.path) + insert_after = tools.to_bytes(sys.prefix) + for path in paths: + new_paths.append(path) + if to_insert and path.startswith(insert_after): + new_paths.append(to_insert) + to_insert = None + if to_insert: + new_paths.append(to_insert) + env[b'PATH'] = b':'.join(new_paths) + else: + env[b'PATH'] = tools.to_bytes(self.path) + b':' + env[b'PATH']
env[b'LC_ALL'] = b'C'