From c58a3787eca9c0c4a7f376ba841cd7e39ab95ece Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Sat, 28 Mar 2020 23:01:09 +0000
Subject: project.boost: factor out everything else

I finally snapped. This starts to resemble sensible structure though.
---
 project/boost/archive.py | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 project/boost/archive.py

(limited to 'project/boost/archive.py')

diff --git a/project/boost/archive.py b/project/boost/archive.py
new file mode 100644
index 0000000..55d05f2
--- /dev/null
+++ b/project/boost/archive.py
@@ -0,0 +1,87 @@
+# Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is part of the "cmake-common" project.
+# For details, see https://github.com/egor-tensin/cmake-common.
+# Distributed under the MIT License.
+
+import abc
+from contextlib import contextmanager
+import logging
+import os.path
+import shutil
+import tempfile
+
+from project.boost.directory import BoostDir
+
+
+class Archive:
+    def __init__(self, version, path):
+        self.version = version
+        self.path = path
+
+    @property
+    def dir_name(self):
+        return self.version.dir_name
+
+    def unpack(self, dest_dir):
+        path = os.path.join(dest_dir, self.dir_name)
+        if os.path.exists(path):
+            raise RuntimeError(f'Boost directory already exists: {path}')
+        logging.info('Unpacking Boost to: %s', path)
+        shutil.unpack_archive(self.path, dest_dir)
+        return BoostDir(path)
+
+
+class ArchiveStorage(abc.ABC):
+    @abc.abstractmethod
+    def get_archive(self, version):
+        pass
+
+    @contextmanager
+    @abc.abstractmethod
+    def write_archive(self, version, contents):
+        pass
+
+
+class PermanentStorage(ArchiveStorage):
+    def __init__(self, cache_dir):
+        self._dir = cache_dir
+
+    def _archive_path(self, version):
+        return os.path.join(self._dir, version.archive_name)
+
+    def get_archive(self, version):
+        path = self._archive_path(version)
+        if os.path.exists(path):
+            return path
+        return None
+
+    @contextmanager
+    def write_archive(self, version, contents):
+        path = self._archive_path(version)
+        logging.info('Writing Boost archive: %s', path)
+        if os.path.exists(path):
+            raise RuntimeError(f'cannot download Boost, file already exists: {path}')
+        with open(path, mode='w+b') as dest:
+            dest.write(contents)
+        yield path
+
+
+class TemporaryStorage(ArchiveStorage):
+    def __init__(self, temp_dir):
+        self._dir = temp_dir
+
+    def get_archive(self, version):
+        return None
+
+    @contextmanager
+    def write_archive(self, version, contents):
+        with tempfile.NamedTemporaryFile(prefix=f'boost_{version}_', suffix=version.archive_ext,
+                                         dir=self._dir, delete=False) as dest:
+            path = dest.name
+            logging.info('Writing Boost archive: %s', path)
+            dest.write(contents)
+        try:
+            yield path
+        finally:
+            logging.info('Removing temporary Boost archive: %s', path)
+            os.remove(path)
-- 
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