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| const pacote = require('pacote')
|
| const formatDiff = require('./format-diff.js')
| const getTarball = require('./tarball.js')
| const untar = require('./untar.js')
|
| // TODO: we test this condition in the diff command
| // so this error probably doesnt need to be here. Or
| // if it does we should figure out a standard code
| // so we can catch it in the cli and display it consistently
| const argsError = () =>
| Object.assign(
| new TypeError('libnpmdiff needs two arguments to compare'),
| { code: 'EDIFFARGS' }
| )
| const diff = async (specs, opts = {}) => {
| if (specs.length !== 2) {
| throw argsError()
| }
|
| const [
| aManifest,
| bManifest,
| ] =
| await Promise.all(specs.map(spec => pacote.manifest(spec, opts)))
|
| const versions = {
| a: aManifest.version,
| b: bManifest.version,
| }
|
| // fetches tarball using pacote
| const [a, b] = await Promise.all([
| getTarball(aManifest, opts),
| getTarball(bManifest, opts),
| ])
|
| // read all files
| // populates `files` and `refs`
| const {
| files,
| refs,
| } = await untar([
| {
| prefix: 'a/',
| item: a,
| },
| {
| prefix: 'b/',
| item: b,
| },
| ], opts)
|
| return formatDiff({
| files,
| opts,
| refs,
| versions,
| })
| }
|
| module.exports = diff
|
|
