1 files changed, 116 insertions, 0 deletions
diff --git a/mesonbuild/scripts/externalproject.py b/mesonbuild/scripts/externalproject.py
new file mode 100644
index 0000000..17c2251
--- /dev/null
+++ b/mesonbuild/scripts/externalproject.py
@@ -0,0 +1,116 @@
+# 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.
+from __future__ import annotations
+
+import os
+import argparse
+import multiprocessing
+import subprocess
+from pathlib import Path
+import typing as T
+
+from ..mesonlib import Popen_safe, split_args
+
+class ExternalProject:
+    def __init__(self, options: argparse.Namespace):
+        self.name = options.name
+        self.src_dir = options.srcdir
+        self.build_dir = options.builddir
+        self.install_dir = options.installdir
+        self.log_dir = options.logdir
+        self.verbose = options.verbose
+        self.stampfile = options.stampfile
+        self.depfile = options.depfile
+        self.make = split_args(options.make)
+
+    def write_depfile(self) -> None:
+        with open(self.depfile, 'w', encoding='utf-8') as f:
+            f.write(f'{self.stampfile}: \\\n')
+            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) -> None:
+        with open(self.stampfile, 'w', encoding='utf-8'):
+            pass
+
+    def supports_jobs_flag(self) -> bool:
+        p, o, e = Popen_safe(self.make + ['--version'])
+        if p.returncode == 0 and ('GNU Make' in o or 'waf' in o):
+            return True
+        return False
+
+    def build(self) -> int:
+        make_cmd = self.make.copy()
+        if self.supports_jobs_flag():
+            make_cmd.append(f'-j{multiprocessing.cpu_count()}')
+        rc = self._run('build', make_cmd)
+        if rc != 0:
+            return rc
+
+        install_cmd = self.make.copy()
+        install_env = {}
+        install_env['DESTDIR'] = self.install_dir
+        install_cmd.append('install')
+        rc = self._run('install', install_cmd, install_env)
+        if rc != 0:
+            return rc
+
+        self.write_depfile()
+        self.write_stampfile()
+
+        return 0
+
+    def _run(self, step: str, command: T.List[str], env: T.Optional[T.Dict[str, str]] = None) -> int:
+        m = 'Running command ' + str(command) + ' in directory ' + str(self.build_dir) + '\n'
+        log_filename = Path(self.log_dir, f'{self.name}-{step}.log')
+        output = None
+        if not self.verbose:
+            output = open(log_filename, 'w', encoding='utf-8')
+            output.write(m + '\n')
+            output.flush()
+        else:
+            print(m)
+        run_env = os.environ.copy()
+        if env:
+            run_env.update(env)
+        p, o, e = Popen_safe(command, stderr=subprocess.STDOUT, stdout=output,
+                             cwd=self.build_dir,
+                             env=run_env)
+        if p.returncode != 0:
+            m = f'{step} step returned error code {p.returncode}.'
+            if not self.verbose:
+                m += '\nSee logs: ' + str(log_filename)
+            print(m)
+        return p.returncode
+
+def run(args: T.List[str]) -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--name')
+    parser.add_argument('--srcdir')
+    parser.add_argument('--builddir')
+    parser.add_argument('--installdir')
+    parser.add_argument('--logdir')
+    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()