external-project: New module to build configure/make projects

This adds an experimental meson module to build projects with other
build systems.

Closes: #4316

1 files changed, 95 insertions, 0 deletions

diff --git a/mesonbuild/scripts/externalproject.py b/mesonbuild/scripts/externalproject.py
new file mode 100644
index 0000000..6c3a89c
--- /dev/null
+++ b/mesonbuild/scripts/externalproject.py
@@ -0,0 +1,95 @@
+# Copyright 2019 The Meson development team
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import argparse
+import multiprocessing
+import subprocess
+from pathlib import Path
+
+from ..mesonlib import Popen_safe
+
+class ExternalProject:
+    def __init__(self, options):
+        self.name = options.name
+        self.src_dir = options.srcdir
+        self.build_dir = options.builddir
+        self.install_dir = options.installdir
+        self.verbose = options.verbose
+        self.stampfile = options.stampfile
+        self.depfile = options.depfile
+        self.make = options.make
+
+    def write_depfile(self):
+        with open(self.depfile, 'w') as f:
+            f.write('{}: \\\n'.format(self.stampfile))
+            for dirpath, dirnames, filenames in os.walk(self.src_dir):
+                dirnames[:] = [d for d in dirnames if not d.startswith('.')]
+                for fname in filenames:
+                    if fname.startswith('.'):
+                        continue
+                    path = Path(dirpath, fname)
+                    f.write('  {} \\\n'.format(path.as_posix().replace(' ', '\\ ')))
+
+    def write_stampfile(self):
+        with open(self.stampfile, 'w') as f:
+            pass
+
+    def gnu_make(self):
+        p, o, e = Popen_safe([self.make, '--version'])
+        if p.returncode == 0 and 'GNU Make' in o:
+            return True
+        return False
+
+    def build(self):
+        make_cmd = [self.make]
+        if not self.verbose:
+            make_cmd.append('--quiet')
+        if self.gnu_make():
+            make_cmd.append('-j' + str(multiprocessing.cpu_count()))
+
+        rc = self._run(make_cmd)
+        if rc != 0:
+            return rc
+
+        install_cmd = make_cmd + ['DESTDIR= ' + self.install_dir, 'install']
+        rc = self._run(install_cmd)
+        if rc != 0:
+            return rc
+
+        self.write_depfile()
+        self.write_stampfile()
+
+        return 0
+
+    def _run(self, command):
+        output = None if self.verbose else subprocess.DEVNULL
+        p, o, e = Popen_safe(command, stderr=subprocess.STDOUT, stdout=output,
+                             cwd=self.build_dir)
+        return p.returncode
+
+def run(args):
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--name')
+    parser.add_argument('--srcdir')
+    parser.add_argument('--builddir')
+    parser.add_argument('--installdir')
+    parser.add_argument('--make')
+    parser.add_argument('--verbose', action='store_true')
+    parser.add_argument('stampfile')
+    parser.add_argument('depfile')
+
+    options = parser.parse_args(args)
+    ep = ExternalProject(options)
+    return ep.build()