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dumpGraphToGraphViz.js
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dumpGraphToGraphViz.js
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// @flow
import type {Asset, BundleBehavior} from '@parcel/types';
import type {Graph} from '@parcel/graph';
import type {AssetGraphNode, BundleGraphNode, Environment} from './types';
import {bundleGraphEdgeTypes} from './BundleGraph';
import {requestGraphEdgeTypes} from './RequestTracker';
import path from 'path';
import {fromNodeId} from '@parcel/graph';
import {fromProjectPathRelative} from './projectPath';
import {SpecifierType, Priority} from './types';
const COLORS = {
root: 'gray',
asset: 'green',
dependency: 'orange',
transformer_request: 'cyan',
file: 'gray',
default: 'white',
};
const TYPE_COLORS = {
bundle: 'blue',
contains: 'grey',
internal_async: 'orange',
references: 'red',
sibling: 'green',
invalidated_by_create: 'green',
invalidated_by_create_above: 'orange',
invalidate_by_update: 'cyan',
invalidated_by_delete: 'red',
};
export default async function dumpGraphToGraphViz(
graph:
| Graph<AssetGraphNode>
| Graph<{|
assets: Array<Asset>,
sourceBundles: Array<number>,
bundleBehavior?: ?BundleBehavior,
|}>
| Graph<BundleGraphNode>,
name: string,
edgeTypes?: typeof bundleGraphEdgeTypes | typeof requestGraphEdgeTypes,
): Promise<void> {
if (
process.env.PARCEL_BUILD_ENV === 'production' ||
process.env.PARCEL_DUMP_GRAPHVIZ == null ||
// $FlowFixMe
process.env.PARCEL_DUMP_GRAPHVIZ == false
) {
return;
}
let detailedSymbols = process.env.PARCEL_DUMP_GRAPHVIZ === 'symbols';
const graphviz = require('graphviz');
const tempy = require('tempy');
let g = graphviz.digraph('G');
for (let [id, node] of graph.nodes) {
let n = g.addNode(nodeId(id));
// $FlowFixMe default is fine. Not every type needs to be in the map.
n.set('color', COLORS[node.type || 'default']);
n.set('shape', 'box');
n.set('style', 'filled');
let label;
if (typeof node === 'string') {
label = node;
} else if (node.assets) {
label = `(${nodeId(id)}), (assetIds: ${[...node.assets]
.map(a => {
let arr = a.filePath.split('/');
return arr[arr.length - 1];
})
.join(', ')}) (sourceBundles: ${node.sourceBundles.join(', ')}) (bb ${
node.bundleBehavior ?? 'none'
})`;
} else if (node.type) {
label = `[${fromNodeId(id)}] ${node.type || 'No Type'}: [${node.id}]: `;
if (node.type === 'dependency') {
label += node.value.specifier;
let parts = [];
if (node.value.priority !== Priority.sync)
parts.push(node.value.priority);
if (node.value.isOptional) parts.push('optional');
if (node.value.specifierType === SpecifierType.url) parts.push('url');
if (node.hasDeferred) parts.push('deferred');
if (node.excluded) parts.push('excluded');
if (parts.length) label += ' (' + parts.join(', ') + ')';
if (node.value.env) label += ` (${getEnvDescription(node.value.env)})`;
let depSymbols = node.value.symbols;
if (detailedSymbols) {
if (depSymbols) {
if (depSymbols.size) {
label +=
'\\nsymbols: ' +
[...depSymbols].map(([e, {local}]) => [e, local]).join(';');
}
let weakSymbols = [...depSymbols]
.filter(([, {isWeak}]) => isWeak)
.map(([s]) => s);
if (weakSymbols.length) {
label += '\\nweakSymbols: ' + weakSymbols.join(',');
}
if (node.usedSymbolsUp.size > 0) {
label += '\\nusedSymbolsUp: ' + [...node.usedSymbolsUp].join(',');
}
if (node.usedSymbolsDown.size > 0) {
label +=
'\\nusedSymbolsDown: ' + [...node.usedSymbolsDown].join(',');
}
} else {
label += '\\nsymbols: cleared';
}
}
} else if (node.type === 'asset') {
label +=
path.basename(fromProjectPathRelative(node.value.filePath)) +
'#' +
node.value.type;
if (detailedSymbols) {
if (!node.value.symbols) {
label += '\\nsymbols: cleared';
} else if (node.value.symbols.size) {
label +=
'\\nsymbols: ' +
[...node.value.symbols]
.map(([e, {local}]) => [e, local])
.join(';');
}
if (node.usedSymbols.size) {
label += '\\nusedSymbols: ' + [...node.usedSymbols].join(',');
}
} else {
label += '\\nsymbols: cleared';
}
} else if (node.type === 'asset_group') {
if (node.deferred) label += '(deferred)';
} else if (node.type === 'file') {
label += path.basename(node.value.filePath);
} else if (node.type === 'transformer_request') {
label +=
path.basename(node.value.filePath) +
` (${getEnvDescription(node.value.env)})`;
} else if (node.type === 'bundle') {
let parts = [];
if (node.value.needsStableName) parts.push('stable name');
parts.push(node.value.name);
parts.push('bb:' + (node.value.bundleBehavior ?? 'null'));
if (parts.length) label += ' (' + parts.join(', ') + ')';
if (node.value.env) label += ` (${getEnvDescription(node.value.env)})`;
} else if (node.type === 'request') {
label = node.value.type + ':' + node.id;
}
}
n.set('label', label);
}
let edgeNames;
if (edgeTypes) {
edgeNames = Object.fromEntries(
Object.entries(edgeTypes).map(([k, v]) => [v, k]),
);
}
for (let edge of graph.getAllEdges()) {
let gEdge = g.addEdge(nodeId(edge.from), nodeId(edge.to));
let color = null;
if (edge.type != 1 && edgeNames) {
color = TYPE_COLORS[edgeNames[edge.type]];
}
if (color != null) {
gEdge.set('color', color);
}
}
let tmp = tempy.file({name: `${name}.png`});
await g.output('png', tmp);
// eslint-disable-next-line no-console
console.log('Dumped', tmp);
}
function nodeId(id) {
// $FlowFixMe
return `node${id}`;
}
function getEnvDescription(env: Environment) {
let description;
if (typeof env.engines.browsers === 'string') {
description = `${env.context}: ${env.engines.browsers}`;
} else if (Array.isArray(env.engines.browsers)) {
description = `${env.context}: ${env.engines.browsers.join(', ')}`;
} else if (env.engines.node) {
description = `node: ${env.engines.node}`;
} else if (env.engines.electron) {
description = `electron: ${env.engines.electron}`;
}
return description ?? '';
}