1 files changed, 134 insertions, 0 deletions
diff --git a/src/boost/libs/metaparse/tools/build_environment.py b/src/boost/libs/metaparse/tools/build_environment.py
new file mode 100755
index 000000000..b104fb35b
--- /dev/null
+++ b/src/boost/libs/metaparse/tools/build_environment.py
@@ -0,0 +1,134 @@
+#!/usr/bin/python
+
+# Copyright Abel Sinkovics (abel@sinkovics.hu) 2016.
+# Distributed under the Boost Software License, Version 1.0.
+#    (See accompanying file LICENSE_1_0.txt or copy at
+#          http://www.boost.org/LICENSE_1_0.txt)
+
+import os
+import subprocess
+import json
+import argparse
+
+
+def load_json(filename):
+    with open(filename, 'r') as f:
+        return json.load(f)
+
+
+class ChildProcess:
+    def __init__(self, cmd, cwd = os.getcwd()):
+        self.cmd = cmd
+        self.cwd = cwd
+
+    def run(self, cmd):
+        cmd_string = ' '.join(cmd)
+        print 'Running {0}'.format(cmd_string)
+        proc = subprocess.Popen(
+            self.cmd + cmd,
+            cwd = self.cwd,
+            stdout = subprocess.PIPE
+        )
+        out = proc.communicate()[0]
+        if proc.returncode == 0:
+            return out
+        else:
+            raise Exception(
+                'Command {0} exited with {1}'.format(
+                    cmd_string,
+                    proc.returncode
+                )
+            )
+
+    def in_dir(self, cwd):
+        return ChildProcess(self.cmd, cwd)
+
+    def in_subdir(self, subdir):
+        return self.in_dir(os.path.join(self.cwd, subdir))
+
+
+def head_of_master(submodule, git, ref):
+    git.run(['fetch'])
+    return git.run(['show-ref', ref]).split()[0]
+
+
+def build_environment(submodules_file, out_dir, git, repo, action, ref):
+    submodules = load_json(submodules_file)
+    git.run(['clone', repo, out_dir])
+    git_in_boost = git.in_dir(out_dir)
+
+    git_in_boost.run(
+        ['submodule', 'init', '--'] + [k for k in submodules.keys() if k != '']
+    )
+    git_in_boost.run(['submodule', 'update'])
+    if action == 'update':
+        with open(submodules_file, 'w') as f:
+            f.write(json.dumps(
+                dict([
+                    (k, head_of_master(k, git_in_boost.in_subdir(k), ref))
+                    for k, v in submodules.iteritems()
+                ]),
+                sort_keys=True,
+                indent=2
+            ))
+    elif action == 'checkout':
+        for name, commit in submodules.iteritems():
+            git_in_boost.in_subdir(name).run(['checkout', commit])
+    else:
+        raise Exception('Invalid action {0}'.format(action))
+
+
+def main():
+    """The main function of the utility"""
+    parser = argparse.ArgumentParser(
+        description='Manage the build environment of Boost.Metaparse'
+    )
+    parser.add_argument(
+        '--dep_json',
+        required=True,
+        help='The json file describing the dependencies'
+    )
+    parser.add_argument(
+        '--git',
+        required=False,
+        default='git',
+        help='The git command to use'
+    )
+    parser.add_argument(
+        '--out',
+        required=False,
+        default='boost',
+        help='The directory to clone into'
+    )
+    parser.add_argument(
+        '--action',
+        required=True,
+        choices=['update', 'checkout'],
+        help='The action to do with the dependencies'
+    )
+    parser.add_argument(
+        '--boost_repository',
+        required=False,
+        default='https://github.com/boostorg/boost.git',
+        help='The Boost repository to clone'
+    )
+    parser.add_argument(
+        '--ref',
+        required=False,
+        default='origin/master',
+        help='The reference to set to in update'
+    )
+    args = parser.parse_args()
+
+    build_environment(
+        args.dep_json,
+        args.out,
+        ChildProcess([args.git]),
+        args.boost_repository,
+        args.action,
+        args.ref
+    )
+
+
+if __name__ == '__main__':
+    main()