45 lines
2.1 KiB
Markdown
45 lines
2.1 KiB
Markdown
# QMK Compiler Development Guide
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This page attempts to introduce developers to the QMK Compiler. It does not go into nitty gritty details- for that you should read code. What this will give you is a framework to hang your understanding on as you read the code.
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# Overview
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The QMK Compile API consists of a few moving parts:
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API Clients interact exclusively with the API service. This is where they submit jobs, check status, and download results. The API service inserts compile jobs into [Redis Queue](https://python-rq.org) and checks both RQ and S3 for the results of those jobs.
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Workers fetch new compile jobs from RQ, compile them, and then upload the source and the binary to an S3 compatible storage engine.
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# Workers
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QMK Compiler Workers are responsible for doing the actual building. When a worker pulls a job from RQ it does several things to complete that job:
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* Make a fresh qmk_firmware checkout
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* Use the supplied layers and keyboard metadata to build a `keymap.c`
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* Build the firmware
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* Zip a copy of the source
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* Upload the firmware, source zip, and a metadata file to S3.
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* Report the status of the job to RQ
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# API Service
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The API service is a relatively simple Flask application. There are a few main views you should understand.
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## @app.route('/v1/compile', methods=['POST'])
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This is the main entrypoint for the API. A client's interaction starts here. The client POST's a JSON document describing their keyboard, and the API does some (very) basic validation of that JSON before submitting the compile job.
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## @app.route('/v1/compile/<string:job_id>', methods=['GET'])
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This is the most frequently called endpoint. It pulls the job details from redis, if they're still available, or the cached job details on S3 if they're not.
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## @app.route('/v1/compile/<string:job_id>/download', methods=['GET'])
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This method allows users to download the compiled firmware file.
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## @app.route('/v1/compile/<string:job_id>/source', methods=['GET'])
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This method allows users to download the source for their firmware.
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