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# Creating a reproduction
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A reproduction is a simplified version of a bug that demonstrates the specific
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scenario in which the bug occurred. It includes all necessary minimal settings
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and instructions and should be as simple as possible while still demonstrating
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the issue.
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## Guide
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### Environment <small>optional</small> { #environment }
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We recommend using a [virtual environment], which is an isolated Python runtime.
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If you are in a virtual environment, any packages that you install or upgrade
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will be local to the environment. If you run into problems, you can
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just delete and recreate the environment. It's trivial to set up:
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- Create a new virtual environment with:
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```
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python3 -m venv venv
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```
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- Activate the environment with:
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``` sh
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. venv/bin/activate # (1)!
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```
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1. Your terminal should now print `(venv)` before the prompt, which is
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how you know that you are inside an environment.
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- Exit the environment with:
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```
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deactivate
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```
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[virtual environment]: https://realpython.com/what-is-pip/#using-pip-in-a-python-virtual-environment
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### Minimal reproduction
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Following the instructions below, you will set up a skeleton project to create
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a reproduction. As mentioned above, we recommend using a [virtual environment],
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so create a new folder in your working directory and a a new virtual environment
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inside it. Next:
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1. As mentioned in our [bug reporting guide], ensure that you're running the
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latest version of Material for MkDocs, which might already include a fix for
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the bug:
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```
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pip install --upgrade --force-reinstall mkdocs-material
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```
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2. Bootstrap a new documentation project using the `mkdocs` executable,
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which you use as a basis for the reproduction. It's essential to create a
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new, empty project for this:
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```
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mkdocs new .
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```
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Start by adding the [minimal configuration] in `mkdocs.yml`:
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``` yaml
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theme:
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name: material
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```
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3. Now, only add the necessary settings to `mkdocs.yml` to keep the
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reproduction minimal. If you are creating a reproduction for a rendering
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bug, create only the necessary amount of Markdown documents. __Repeat this
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step until the bug you want to report can be observed.__
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4. As a last step, before packing everything into a .zip file, double-check
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all settings and documents if they are essential to the reproduction, which
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means that the bug does not occur when they are omitted. Remove all
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non-essential lines and files.
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[bug reporting guide]: index.md#upgrade-to-latest-version
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[minimal configuration]: ../../creating-your-site/#minimal-configuration
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### Creating a .zip file
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Material for MkDocs 9.0.0 includes a new plugin solely intended to create
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reproductions for bug reports. When the built-in info plugin is enabled, MkDocs
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will add all relevant files to a .zip, print a summary to the terminal and
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exit. Add the following lines to `mkdocs.yml`:
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``` yaml
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plugins:
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- info
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```
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Now, when running `mkdocs build`, a file called `example.zip` is automatically
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created, containing the minimal reproduction you can directly attach to your bug
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report.
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```
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INFO - Started archive creation for bug report
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INFO - Archive successfully created:
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example/.dependencies.json 859.0 B
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example/.versions.log 83.0 B
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example/docs/index.md 282.0 B
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example/mkdocs.yml 56.0 B
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example.zip 1.8 kB
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```
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