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Archiving/Extracting maf.py without a temporary file #111

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14 changes: 6 additions & 8 deletions generate_maf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -26,12 +26,12 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

import io
import os
import tarfile

TEMPLATE_FILE_NAME = 'maf_template.py'
TARGET_FILE_NAME = 'maf.py'
ARCHIVE_FILE_NAME = 'maflib.tar.bz2'
MAFLIB_PATH = 'maflib'

NEW_LINE = '#XXX'.encode()
Expand All @@ -42,24 +42,22 @@

if __name__ == '__main__':
try:
archive = tarfile.open(ARCHIVE_FILE_NAME, 'w:bz2')
f = io.BytesIO()
archive = tarfile.open(fileobj=f, mode='w:bz2')
archive.add(MAFLIB_PATH, exclude=lambda fn: fn.endswith('.pyc'))
except tarfile.TarError:
raise Exception('can not use tar.bz2 file')
finally:
archive.close()


archive = f.getvalue()

with open(TEMPLATE_FILE_NAME) as f:
code = f.read()

with open(ARCHIVE_FILE_NAME, 'rb') as f:
archive = f.read()

code += '#==>\n#'.encode()
code += archive.replace('\n'.encode(), NEW_LINE).replace('\r'.encode(), CARRIAGE_RETURN)
code += '\n#<==\n'.encode()

with open(TARGET_FILE_NAME, 'wb') as f:
f.write(code)

os.unlink(ARCHIVE_FILE_NAME)
26 changes: 3 additions & 23 deletions maf_template.py
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@
# NOTE: coding ISO8859-1 is necessary for attaching maflib at the end of this
# file.

import io
import os
import os.path
import shutil
Expand All @@ -42,7 +43,6 @@
import waflib.Context
import waflib.Logs

TAR_NAME = 'maflib.tar'
NEW_LINE = '#XXX'.encode()
CARRIAGE_RETURN = '#YYY'.encode()
ARCHIVE_BEGIN = '#==>\n'.encode()
Expand Down Expand Up @@ -94,29 +94,9 @@ def unpack_maflib(directory):
os.makedirs(os.path.join(directory, 'maflib'))
os.chdir(directory)

bz2_name = TAR_NAME + '.bz2'
with open(bz2_name, 'wb') as f:
f.write(content)

try:
t = tarfile.open(bz2_name)
except:
try:
os.system('bunzip2 ' + bz2_name)
t = tarfile.open(TAR_NAME)
except:
raise Exception('Cannot extract maflib. Check that python bz2 module or bunzip2 command is available.')

try:
f = io.BytesIO(content)
with tarfile.open(fileobj=f) as t:
t.extractall()
finally:
t.close()

try:
os.remove(bz2_name)
os.remove(TAR_NAME)
except:
pass

maflib_path = os.path.abspath(os.getcwd())
return maflib_path
Expand Down