const jsDiff = require('diff')
|
|
const shouldPrintPatch = require('./should-print-patch.js')
|
|
const colors = {
|
// red
|
removed: { open: '\x1B[31m', close: '\x1B[39m' },
|
// green
|
added: { open: '\x1B[32m', close: '\x1B[39m' },
|
// blue
|
header: { open: '\x1B[34m', close: '\x1B[39m' },
|
// cyan
|
section: { open: '\x1B[36m', close: '\x1B[39m' },
|
}
|
|
const color = (colorStr, colorId) => {
|
const { open, close } = colors[colorId]
|
// avoid highlighting the "\n" (would highlight till the end of the line)
|
return colorStr.replace(/[^\n\r]+/g, open + '$&' + close)
|
}
|
|
const formatDiff = ({ files, opts = {}, refs, versions }) => {
|
let res = ''
|
const srcPrefix = opts.diffNoPrefix ? '' : opts.diffSrcPrefix || 'a/'
|
const dstPrefix = opts.diffNoPrefix ? '' : opts.diffDstPrefix || 'b/'
|
|
for (const filename of files.values()) {
|
const names = {
|
a: `${srcPrefix}${filename}`,
|
b: `${dstPrefix}${filename}`,
|
}
|
|
let fileMode = ''
|
const filenames = {
|
a: refs.get(`a/${filename}`),
|
b: refs.get(`b/${filename}`),
|
}
|
const contents = {
|
a: filenames.a && filenames.a.content,
|
b: filenames.b && filenames.b.content,
|
}
|
const modes = {
|
a: filenames.a && filenames.a.mode,
|
b: filenames.b && filenames.b.mode,
|
}
|
|
if (contents.a === contents.b && modes.a === modes.b) {
|
continue
|
}
|
|
if (opts.diffNameOnly) {
|
res += `${filename}\n`
|
continue
|
}
|
|
let patch = ''
|
let headerLength = 0
|
const header = str => {
|
headerLength++
|
patch += `${str}\n`
|
}
|
|
// manually build a git diff-compatible header
|
header(`diff --git ${names.a} ${names.b}`)
|
if (modes.a === modes.b) {
|
fileMode = filenames.a.mode
|
} else {
|
if (modes.a && !modes.b) {
|
header(`deleted file mode ${modes.a}`)
|
} else if (!modes.a && modes.b) {
|
header(`new file mode ${modes.b}`)
|
} else {
|
header(`old mode ${modes.a}`)
|
header(`new mode ${modes.b}`)
|
}
|
}
|
/* eslint-disable-next-line max-len */
|
header(`index ${opts.tagVersionPrefix || 'v'}${versions.a}..${opts.tagVersionPrefix || 'v'}${versions.b} ${fileMode}`)
|
|
if (shouldPrintPatch(filename)) {
|
patch += jsDiff.createTwoFilesPatch(
|
names.a,
|
names.b,
|
contents.a || '',
|
contents.b || '',
|
'',
|
'',
|
{
|
context: opts.diffUnified === 0 ? 0 : opts.diffUnified || 3,
|
ignoreWhitespace: opts.diffIgnoreAllSpace,
|
}
|
).replace(
|
'===================================================================\n',
|
''
|
).replace(/\t\n/g, '\n') // strip trailing tabs
|
headerLength += 2
|
} else {
|
header(`--- ${names.a}`)
|
header(`+++ ${names.b}`)
|
}
|
|
if (opts.color) {
|
// this RegExp will include all the `\n` chars into the lines, easier to join
|
const lines = patch.split(/^/m)
|
res += color(lines.slice(0, headerLength).join(''), 'header')
|
res += lines.slice(headerLength).join('')
|
.replace(/^-.*/gm, color('$&', 'removed'))
|
.replace(/^\+.*/gm, color('$&', 'added'))
|
.replace(/^@@.+@@/gm, color('$&', 'section'))
|
} else {
|
res += patch
|
}
|
}
|
|
return res.trim()
|
}
|
|
module.exports = formatDiff
|
