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Python LSIF Indexer

🚨 This implementation is in its infancy and conforms to the 0.4.0 draft of the LSIF spec.

Language Server Index Format

The purpose of the Language Server Index Format (LSIF) is to define a standard format for language servers and related tools to dump their knowledge about a workspace. The dump is basically a pre-computed set of responses that a language server would send back about a particular range of source code.

Basic Usage

To run the indexer, simply run the provided shell script wrapper and provide a workspace directory to be indexed.

$ ./lsif-py lsif_indexer
Indexing file lsif_indexer/analysis.py
Indexing file lsif_indexer/index.py
Indexing file lsif_indexer/__init__.py
Indexing file lsif_indexer/consts.py
Indexing file lsif_indexer/script.py
Indexing file lsif_indexer/emitter.py

Processed in 2834.89ms

Verbose logging can be enabled with -v. The dump file is data.lsif by default, but can be changed via the -o <filename> flag.

Installation Notes

The indexer requires Python 3.x. To install dependencies, run:

pip install -r requirements.txt

If you don't want to install dependencies globally, use virtualenv:

$ virtualenv venv
$ source venv/bin/activate
(venv) $ pip install -r requirements.txt
(venv) $ ./lsif-py lsif_indexer
# ...
(venv) $ deactivate
$

Installation on macOS

On macOS, where the system Python on macOS is still 2.7.x, you can install Python 3 via Homebrew:

brew install python@3

You may need to write pip3 instead of pip to get the correct version.

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Language Server Indexing Format (LSIF) generator for Python

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