update

package/node_modules/libnpmdiff/lib/format-diff.js

@@ -0,0 +1,118 @@
+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