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65 lines
2.4 KiB
Markdown
65 lines
2.4 KiB
Markdown
# Screencast / Asciinema
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[Asciinema](https://github.com/asciinema/asciinema) is used to automatically generate
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terminal session recordings for our documentation. To fully automate this we use scripts
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that utilize [expect](https://manpages.debian.org/testing/expect/expect.1.en.html) to interface with different
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CLI tools, and run them inside a [container](docker/Dockerfile).
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## Usage
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```sh
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mkdir -p constellation
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./generate-screencasts.sh
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sudo chown -R $USER:$USER ./constellation
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cd constellation && constellation iam destroy
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cd .. && rm -rf ./constellation
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```
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This will:
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+ build the container
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+ run the expect based scripts
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+ copy recordings into the assets folder of our docs
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To replay the output you can use `asciinema play recordings/verify-cli.cast`.
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Include the generated screencast into our docs using the [`AsciinemaWidget`](../src/components/AsciinemaWidget/index.js):
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```md
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import AsciinemaWidget from '../../src/components/AsciinemaWidget';
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<AsciinemaWidget src="/constellation/assets/verify-cli.cast" fontSize={16} rows={20} cols={112} idleTimeLimit={3} preload={true} theme={'edgeless'} />
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```
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Then [re-build and locally host the docs](../README.md).
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## Styling
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There are three different locations were styling is applied:
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1. **The prompt** is styled using [ANSI escape codes](https://en.wikipedia.org/wiki/ANSI_escape_code).
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More explanation and the actual color codes can be found in [Dockerfile](docker/Dockerfile).
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2. **Player dimensions** are passed to the [`AsciinemaWidget`](../src/components/AsciinemaWidget/index.js)
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when it's [embedded in the docs](../docs/workflows/verify-cli.md). Check the `asciinema-player` for a
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[full list of options](https://github.com/asciinema/asciinema-player#options).
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3. **Everything else** is [styled via CSS](../src/css/custom.css). This includes the option to build a custom
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[player theme](https://github.com/asciinema/asciinema-player/wiki/Custom-terminal-themes).
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## GitHub README.md
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The GitHub `README.md` doesn't support embedding the JavaScript `asciinema-player`, therefore we generate an
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`svg` file for that use case.
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```sh
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# Make sure to install the converter.
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# https://github.com/nbedos/termtosvg
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pip3 install termtosvg
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# Generate SVG. This takes ~10min, since it actually creates a cluster in GCP.
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mkdir constellation
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./generate-readme-svg.sh
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sudo chown -R $USER:$USER ./constellation
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cd constellation && constellation iam destroy
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cd .. && rm -rf ./constellation
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```
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