cookiecutter /
cookiecutter
| Conditions | 17 |
| Total Lines | 100 |
| Code Lines | 56 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
Complex classes like cookiecutter.zipfile.unzip() often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | """Utility functions for handling and fetching repo archives in zip format.""" |
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| 22 | def unzip(zip_uri, is_url, clone_to_dir='.', no_input=False, password=None): |
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| 23 | """Download and unpack a zipfile at a given URI. |
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| 24 | |||
| 25 | This will download the zipfile to the cookiecutter repository, |
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| 26 | and unpack into a temporary directory. |
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| 27 | |||
| 28 | :param zip_uri: The URI for the zipfile. |
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| 29 | :param is_url: Is the zip URI a URL or a file? |
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| 30 | :param clone_to_dir: The cookiecutter repository directory |
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| 31 | to put the archive into. |
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| 32 | :param no_input: Suppress any prompts |
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| 33 | :param password: The password to use when unpacking the repository. |
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| 34 | """ |
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| 35 | # Ensure that clone_to_dir exists |
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| 36 | clone_to_dir = os.path.expanduser(clone_to_dir) |
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| 37 | make_sure_path_exists(clone_to_dir) |
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| 38 | |||
| 39 | if is_url: |
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| 40 | # Build the name of the cached zipfile, |
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| 41 | # and prompt to delete if it already exists. |
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| 42 | identifier = zip_uri.rsplit('/', 1)[1] |
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| 43 | zip_path = os.path.join(clone_to_dir, identifier) |
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| 44 | |||
| 45 | if os.path.exists(zip_path): |
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| 46 | download = prompt_and_delete(zip_path, no_input=no_input) |
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| 47 | else: |
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| 48 | download = True |
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| 49 | |||
| 50 | if download: |
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| 51 | # (Re) download the zipfile |
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| 52 | r = requests.get(zip_uri, stream=True) |
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| 53 | with open(zip_path, 'wb') as f: |
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| 54 | for chunk in r.iter_content(chunk_size=1024): |
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| 55 | if chunk: # filter out keep-alive new chunks |
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| 56 | f.write(chunk) |
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| 57 | else: |
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| 58 | # Just use the local zipfile as-is. |
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| 59 | zip_path = os.path.abspath(zip_uri) |
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| 60 | |||
| 61 | # Now unpack the repository. The zipfile will be unpacked |
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| 62 | # into a temporary directory |
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| 63 | try: |
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| 64 | zip_file = ZipFile(zip_path) |
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| 65 | |||
| 66 | if len(zip_file.namelist()) == 0: |
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| 67 | raise InvalidZipRepository('Zip repository {} is empty'.format(zip_uri)) |
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| 68 | |||
| 69 | # The first record in the zipfile should be the directory entry for |
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| 70 | # the archive. If it isn't a directory, there's a problem. |
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| 71 | first_filename = zip_file.namelist()[0] |
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| 72 | if not first_filename.endswith('/'): |
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| 73 | raise InvalidZipRepository( |
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| 74 | 'Zip repository {} does not include ' |
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| 75 | 'a top-level directory'.format(zip_uri) |
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| 76 | ) |
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| 77 | |||
| 78 | # Construct the final target directory |
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| 79 | project_name = first_filename[:-1] |
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| 80 | unzip_base = tempfile.mkdtemp() |
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| 81 | unzip_path = os.path.join(unzip_base, project_name) |
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| 82 | |||
| 83 | # Extract the zip file into the temporary directory |
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| 84 | try: |
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| 85 | zip_file.extractall(path=unzip_base) |
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| 86 | except RuntimeError: |
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| 87 | # File is password protected; try to get a password from the |
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| 88 | # environment; if that doesn't work, ask the user. |
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| 89 | if password is not None: |
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| 90 | try: |
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| 91 | zip_file.extractall(path=unzip_base, pwd=password.encode('utf-8')) |
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| 92 | except RuntimeError: |
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| 93 | raise InvalidZipRepository( |
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| 94 | 'Invalid password provided for protected repository' |
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| 95 | ) |
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| 96 | elif no_input: |
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| 97 | raise InvalidZipRepository( |
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| 98 | 'Unable to unlock password protected repository' |
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| 99 | ) |
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| 100 | else: |
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| 101 | retry = 0 |
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| 102 | while retry is not None: |
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| 103 | try: |
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| 104 | password = read_repo_password('Repo password') |
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| 105 | zip_file.extractall( |
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| 106 | path=unzip_base, pwd=password.encode('utf-8') |
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| 107 | ) |
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| 108 | retry = None |
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| 109 | except RuntimeError: |
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| 110 | retry += 1 |
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| 111 | if retry == 3: |
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| 112 | raise InvalidZipRepository( |
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| 113 | 'Invalid password provided ' 'for protected repository' |
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| 114 | ) |
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| 115 | |||
| 116 | except BadZipFile: |
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| 117 | raise InvalidZipRepository( |
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| 118 | 'Zip repository {} is not a valid zip archive:'.format(zip_uri) |
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| 119 | ) |
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| 120 | |||
| 121 | return unzip_path |
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| 122 |
