lsif-node/util

lsif-util

Scripts to help LSIF developers.

Installation

npm install -g lsif-util

Usage

lsif-util [validate|visualize] [file] --inputFormat [line|json] [--stdin] [filters]

Option	Description	Default
--inputFormat	Specify input format (choices: "line", "json")	line
--stdin	Read from standard input	false

You can use the --stdin flag to pipe LSIF output:

lsif-tsc -p .\tsconfig.json --stdout | lsif-util validate --stdin

Validation

Returns whether the LSIF input file is syntatically valid or not.

Verifies the following:

• Vertex properties are correct
• Edge properties are correct
• Vertices are emitted before connecting edges
• Vertices are used in at least one edge (except metadata)

Visualization

Option	Default	Description
--distance	1	Max distance between any vertex and the filtered input

Outputs a DOT graph.

You can either visualize it online using Viz.js or install Graphviz and pipe it to the DOT tool:

lsif-util visualize .\example\line.json --distance 2 | dot -Tpng -o image.png

Filters

Filters can help you narrow down what you want to validate/visualize. You can filter by some of the most common properties in LSIF. Different values should be separated by space. The "regex" filter is a special case that only accepts one value.

Property	Node	Example
--id	Vertex/Edge	1 2 3
--inV	Edge	1 2 3
--outV	Edge	1 2 3
--type	Vertex/Edge	vertex edge
--label	Vertex/Edge	project range item
--property	Edge	references definitions
--regex	Vertex/Edge	foo

Validating outgoing edges from vertices 1, 2 or 3:

lsif-util validate .\example\line.json --outV 1 2 3

Visualizing ranges that have "foo" somewhere in them:

lsif-util visualize .\example\line.json --label range --regex foo