Force installation dir options to be inside prefix

With the exception of things like sysconfdir (/etc), every other
installation directory option must be inside the prefix.

Also move the prefix checks to coredata.py since prefix can also be set
from inside project() with default_options and via mesonconf. Earlier
you could set prefix to a relative path that way.

This also allows us to return consistent values for get_option('xxxdir')
regardless of whether relative paths are passed or absolute paths are
passed while setting options on the command-line, via mesonconf, or via
default_options in project(). Now the returned path will *always* be
relative to the prefix.

Includes a unit test for this, and a failing test.

Closes #1299

1 files changed, 21 insertions, 5 deletions

diff --git a/run_unittests.py b/run_unittests.py
index 123bca8..6aa5b2b 100755
--- a/run_unittests.py
+++ b/run_unittests.py
@@ -33,10 +33,11 @@ def get_soname(fname):
             return m.group(1)
     raise RuntimeError('Could not determine soname:\n\n' + raw_out)
 
-def get_fake_options():
+def get_fake_options(prefix):
     import argparse
     opts = argparse.Namespace()
     opts.cross_file = None
+    opts.prefix = prefix
     return opts
 
 class FakeEnvironment(object):
@@ -85,7 +86,8 @@ class LinuxlikeTests(unittest.TestCase):
         super().tearDown()
 
     def _run(self, command):
-        self.output += subprocess.check_output(command, env=os.environ.copy())
+        self.output += subprocess.check_output(command, stderr=subprocess.STDOUT,
+                                               env=os.environ.copy())
 
     def init(self, srcdir, extra_args=None):
         if extra_args is None:
@@ -510,7 +512,7 @@ class LinuxlikeTests(unittest.TestCase):
         '''
         testdir = os.path.join(self.common_test_dir, '1 trivial')
         env = Environment(testdir, self.builddir, self.meson_command,
-                          get_fake_options(), [])
+                          get_fake_options(self.prefix), [])
         cc = env.detect_c_compiler(False)
         self._test_stds_impl(testdir, cc, 'c')
 
@@ -521,11 +523,10 @@ class LinuxlikeTests(unittest.TestCase):
         '''
         testdir = os.path.join(self.common_test_dir, '2 cpp')
         env = Environment(testdir, self.builddir, self.meson_command,
-                          get_fake_options(), [])
+                          get_fake_options(self.prefix), [])
         cpp = env.detect_cpp_compiler(False)
         self._test_stds_impl(testdir, cpp, 'cpp')
 
-
     def test_build_by_default(self):
         testdir = os.path.join(self.unit_test_dir, '5 build by default')
         self.init(testdir)
@@ -537,6 +538,21 @@ class LinuxlikeTests(unittest.TestCase):
         self._run(self.ninja_command + ['fooprog'])
         self.assertTrue(os.path.exists(exe))
 
+    def test_libdir_must_be_inside_prefix(self):
+        testdir = os.path.join(self.common_test_dir, '1 trivial')
+        # libdir being inside prefix is ok
+        args = ['--prefix', '/opt', '--libdir', '/opt/lib32']
+        self.init(testdir, args)
+        self.wipe()
+        # libdir not being inside prefix is not ok
+        args = ['--prefix', '/usr', '--libdir', '/opt/lib32']
+        self.assertRaises(subprocess.CalledProcessError, self.init, testdir, args)
+        self.wipe()
+        # libdir must be inside prefix even when set via mesonconf
+        self.init(testdir)
+        self.assertRaises(subprocess.CalledProcessError, self.setconf, '-Dlibdir=/opt')
+
+
 class RewriterTests(unittest.TestCase):
 
     def setUp(self):