Contributing to spotdl

First off, thanks for taking the time to contribute! ❤️

All types of contributions are encouraged and valued. See the Table of Contents for different ways to help and details about how this project handles them. Please make sure to read the relevant section before making your contribution. It will make it a lot easier for us maintainers and smooth out the experience for everyone involved. The community looks forward to your contributions. 🎉

And if you like the project, but just don't have time to contribute, that's fine. There are other easy ways to support the project and show your appreciation, which we would also be very happy about:

Star the project

Tweet about it

Refer this project in your project's readme

Mention the project at local meetups and tell your friends/colleagues

I Have a Question

If you want to ask a question, we assume that you have read the available Documentation.

Before you ask a question, it is best to search for existing Issues that might help you. In case you have found a suitable issue and still need clarification, you can write your question in this issue. It is also advisable to search the internet for answers first.

If you then still feel the need to ask a question and need clarification, we recommend the following:

Open an Issue.
Provide as much context as you can about what you're running into.
Provide project and platform versions (nodejs, npm, etc), depending on what seems relevant.

We will then take care of the issue as soon as possible.

I Want To Contribute

Legal Notice

When contributing to this project, you must agree that you have authored 100% of the content, that you have the necessary rights to the content and that the content you contribute may be provided under the project license.

Reporting Bugs

Before Submitting a Bug Report

A good bug report shouldn't leave others needing to chase you up for more information. Therefore, we ask you to investigate carefully, collect information and describe the issue in detail in your report. Please complete the following steps in advance to help us fix any potential bug as fast as possible.

Make sure that you are using the latest version.
Determine if your bug is really a bug and not an error on your side e.g. using incompatible environment components/versions (Make sure that you have read the documentation. If you are looking for support, you might want to check this section).
To see if other users have experienced (and potentially already solved) the same issue you are having, check if there is not already a bug report existing for your bug or error in the bug tracker.
Also make sure to search the internet (including Stack Overflow) to see if users outside of the GitHub community have discussed the issue.
Collect information about the bug:
Stack trace (Traceback)
OS, Platform and Version (Windows, Linux, macOS, x86, ARM)
Version of the interpreter, compiler, SDK, runtime environment, package manager, depending on what seems relevant.
Possibly your input and the output
Can you reliably reproduce the issue? And can you also reproduce it with older versions?

How Do I Submit a Good Bug Report?

You must never report security related issues, vulnerabilities or bugs to the issue tracker, or elsewhere in public. Instead sensitive bugs must be sent by discord to xnetcat#8144.

We use GitHub issues to track bugs and errors. If you run into an issue with the project:

Open an Issue. (Since we can't be sure at this point whether it is a bug or not, we ask you not to talk about a bug yet and not to label the issue.)
Explain the behavior you would expect and the actual behavior.
Please provide as much context as possible and describe the reproduction steps that someone else can follow to recreate the issue on their own. This usually includes your code. For good bug reports you should isolate the problem and create a reduced test case.
Provide the information you collected in the previous section.

Once it's filed:

The project team will label the issue accordingly.
A team member will try to reproduce the issue with your provided steps. If there are no reproduction steps or no obvious way to reproduce the issue, the team will ask you for those steps and mark the issue as needs-repro. Bugs with the needs-repro tag will not be addressed until they are reproduced.
If the team is able to reproduce the issue, it will be marked needs-fix, as well as possibly other tags (such as critical), and the issue will be left to be implemented by someone.

Suggesting Enhancements

This section guides you through submitting an enhancement suggestion for spotdl, including completely new features and minor improvements to existing functionality. Following these guidelines will help maintainers and the community to understand your suggestion and find related suggestions.

Before Submitting an Enhancement

Make sure that you are using the latest version.
Read the documentation carefully and find out if the functionality is already covered, maybe by an individual configuration.
Perform a search to see if the enhancement has already been suggested. If it has, add a comment to the existing issue instead of opening a new one.
Find out whether your idea fits with the scope and aims of the project. It's up to you to make a strong case to convince the project's developers of the merits of this feature. Keep in mind that we want features that will be useful to the majority of our users and not just a small subset. If you're just targeting a minority of users, consider writing an add-on/plugin library.

How Do I Submit a Good Enhancement Suggestion?

Enhancement suggestions are tracked as GitHub issues.

Use a clear and descriptive title for the issue to identify the suggestion.
Provide a step-by-step description of the suggested enhancement in as many details as possible.
Describe the current behavior and explain which behavior you expected to see instead and why. At this point you can also tell which alternatives do not work for you.
You may want to include screenshots and animated GIFs which help you demonstrate the steps or point out the part which the suggestion is related to. You can use this tool to record GIFs on macOS and Windows, and this tool or this tool on Linux.
Explain why this enhancement would be useful to most spotdl users. You may also want to point out the other projects that solved it better and which could serve as inspiration.

Developing

Fork the repository on Github and then clone it.

git clone [your username]/spotify-downloader
cd spotify-downloader

(Optional) Create a virtual environment

python3 -m venv .venv

Activate the virtual environment.

Linux: source .venv/bin/activate
Windows: .venv\Scripts\activate

See Python's official venv docs for advanced virtual environment setup.

Then, to install spotDL in-place and editable, run the following

pip install -e .

All changes will now affect the venv installation of the spotdl cli.

Linting, Formatting and Type-checking

We use pylint for linting and expect a score above 9

pylint --limit-inference-results 0 --fail-under 9 ./spotdl

We use black for code formatting
```
black ./spotdl
```

We use mypy for type-checking and expect no errors at all

To install type-stubs the first time around

mypy --ignore-missing-imports --follow-imports silent --install-types --non-interactive ./spotdl

mypy ./spotdl

You can install these basic tools with

pip install --force-reinstall --upgrade mypy black pylint

Python Documentation

Any submitted code is expected to have accompanying documentation

mkdocs: generating documentation

We generate our documentation with mkdocs
```
pip install mkdocs
```
mkdocs requires that all development packages are installed
```
poetry install
```
generate docs with
```
mkdocs build --strict
```
view docs live-time while editing with
```
mkdocs serve
```

DocString Formats

For functions

one-liner about functions purpose

### Args (optional)
- arg_name: description

### Returns (optional)
- return value description

### Errors (only if there are known unhandled Errors/thrown Errors)
- known errors

### Notes (optional)
- notes if any

For Classes

one-liner about class purpose

### Attributes
- attribute: description

### Notes (optional)
- notes if any

For modules/package __init__

at max 3 lines about module/package purpose

optional usage example for module/package preferably showcasing most commonly used functionality

Notes about docstrings

DocStrings are Inherited

class A:
    def test(self):
        """Docstring for A."""
        pass

class B(A):
    def test(self):
        pass

# B.test.__doc__ acc. to normal python  : None
# B.test.__doc__ acc. to normal pdoc3   : Docstring for A.

You can write DocStrings for variables with #: comment above the variable
```
#: an example variable to demonstrate DocStrings
example_var_1 = 1
```
You can use the reST directives ..math:: and ..image::

Markdown formatting

Markdown is formatted with mdformat-gfm and indexes are auto-generated with mdformat-toc
```
pip install mdformat-gfm mdformat-toc
```
Create an Index using the following comment, the index will be updated when mdformat is run
```

```
Preferably use empty lines between points on ordered & un-ordered lists
Format your markdown using
```
mdformat --wrap 95 --number ./
```

Overview of the Project Structure

sub-package	purpose
`utils`	Contains commonly used functions
`types`	Custom data types used in the spotdl project
`providers`	Different Providers to obtain info (like song details) from
`download`	Download manager
`console`	Different user-facing operations like download, preload and web-ui
`__init__`	Contains spotdl class that simplifies the download process

Join The Project Team

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CONTRIBUTING.md

CONTRIBUTING.md

Contributing to spotdl

Table of Contents

I Have a Question

I Want To Contribute

Legal Notice

Reporting Bugs

Before Submitting a Bug Report

How Do I Submit a Good Bug Report?

Suggesting Enhancements

Before Submitting an Enhancement

How Do I Submit a Good Enhancement Suggestion?

Developing

Linting, Formatting and Type-checking

Python Documentation

mkdocs: generating documentation

DocString Formats

Notes about docstrings

Markdown formatting

Overview of the Project Structure

Join The Project Team

Attribution

Files

CONTRIBUTING.md

Latest commit

History

CONTRIBUTING.md

File metadata and controls

Contributing to spotdl

Table of Contents

I Have a Question

I Want To Contribute

Legal Notice

Reporting Bugs

Before Submitting a Bug Report

How Do I Submit a Good Bug Report?

Suggesting Enhancements

Before Submitting an Enhancement

How Do I Submit a Good Enhancement Suggestion?

Developing

Linting, Formatting and Type-checking

Python Documentation

mkdocs: generating documentation

DocString Formats

Notes about docstrings

Markdown formatting

Overview of the Project Structure

Join The Project Team

Attribution