57 lines
1.0 KiB
JavaScript
57 lines
1.0 KiB
JavaScript
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const pacote = require('pacote')
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const formatDiff = require('./lib/format-diff.js')
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const untar = require('./lib/untar.js')
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const argsError = () =>
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Object.assign(
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new TypeError('libnpmdiff needs two arguments to compare'),
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{ code: 'EDIFFARGS' }
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)
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const diff = async (specs, opts = {}) => {
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if (specs.length !== 2)
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throw argsError()
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const [
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aManifest,
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bManifest,
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] =
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await Promise.all(specs.map(spec => pacote.manifest(spec, opts)))
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const versions = {
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a: aManifest.version,
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b: bManifest.version,
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}
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// fetches tarball using pacote
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const [a, b] = await Promise.all([
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pacote.tarball(aManifest._resolved, opts),
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pacote.tarball(bManifest._resolved, opts),
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])
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// read all files
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// populates `files` and `refs`
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const {
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files,
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refs,
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} = await untar([
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{
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prefix: 'a/',
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item: a,
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},
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{
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prefix: 'b/',
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item: b,
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},
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], opts)
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return formatDiff({
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files,
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opts,
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refs,
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versions,
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})
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}
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module.exports = diff
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