fix(git): handle file renames between folders (#6020)

* git storage: handle file renames between folders

---------

Co-authored-by: Nicolas Giard <github@ngpixel.com>

server/modules/storage/disk/storage.js

@@ -135,7 +135,7 @@ module.exports = {
         transform: async (page, enc, cb) => {
           const pageObject = await WIKI.models.pages.query().findById(page.id)
           page.tags = await pageObject.$relatedQuery('tags')
-          
+
           let fileName = `${page.path}.${pageHelper.getFileExtension(page.contentType)}`
           if (WIKI.config.lang.code !== page.localeCode) {
             fileName = `${page.localeCode}/${fileName}`

server/modules/storage/git/storage.js

@@ -146,10 +146,24 @@ module.exports = {
       const diff = await this.git.diffSummary(['-M', currentCommitLog.hash, latestCommitLog.hash])
       if (_.get(diff, 'files', []).length > 0) {
         let filesToProcess = []
+        const filePattern = /(.*?)(?:{(.*?))? => (?:(.*?)})?(.*)/
         for (const f of diff.files) {
-          const fMoved = f.file.split(' => ')
-          const fName = fMoved.length === 2 ? fMoved[1] : fMoved[0]
-          const fPath = path.join(this.repoPath, fName)
+          const fMatch = f.file.match(filePattern)
+          const fNames = {
+            old: null,
+            new: null
+          }
+          if (!fMatch) {
+            fNames.old = f.file
+            fNames.new = f.file
+          } else if (!fMatch[2] && !fMatch[3]) {
+            fNames.old = fMatch[1]
+            fNames.new = fMatch[4]
+          } else {
+            fNames.old = (fMatch[1]+fMatch[2]+fMatch[4]).replace('//', '/'),
+            fNames.new = (fMatch[1]+fMatch[3]+fMatch[4]).replace('//', '/')
+          }
+          const fPath = path.join(this.repoPath, fNames.new)
           let fStats = { size: 0 }
           try {
             fStats = await fs.stat(fPath)
@@ -166,8 +180,8 @@ module.exports = {
               path: fPath,
               stats: fStats
             },
-            oldPath: fMoved[0],
-            relPath: fName
+            oldPath: fNames.old,
+            relPath: fNames.new
           })
         }
         await this.processFiles(filesToProcess, rootUser)