Optim: Get all container inodes in one find command

This greatly speeds up the scanner when we are looking for corresponding
container mount points. The scanner now runs only one find command
instead of one per directory level in the layer path.

client/src/driver/BitBakeProjectScanner.ts

@@ -114,15 +114,15 @@ export class BitBakeProjectScanner {
     }
   }
 
-  private async getContainerInode (filepath: string): Promise<number> {
-    const commandResult = await this.executeBitBakeCommand(`stat -c %i ${filepath}`)
+  private async getContainerParentInodes (filepath: string): Promise<number[]> {
+    const commandResult = await this.executeBitBakeCommand(`f=${filepath}; while [[ $f != / ]]; do stat -c %i $f; f=$(dirname "$f"); done;`)
     const stdout = commandResult.stdout.toString().trim()
-    const regex = /^\d+$/m
-    const match = stdout.match(regex)
-    const inode = (match != null) ? parseInt(match[0]) : NaN
-    return inode
+    const regex = /^\d+$/gm
+    const matches = stdout.match(regex)
+    return (matches != null) ? matches.map((match) => parseInt(match)) : [NaN]
   }
 
+  /// Find corresponding mount point inode in layerPath/hostWorkdir and all parents
   private async scanContainerMountPoint (layerPath: string, hostWorkdir: string): Promise<void> {
     this.containerMountPoint = undefined
     this.hostMountPoint = undefined
@@ -132,24 +132,24 @@ export class BitBakeProjectScanner {
       return
     }
 
+    let containerDir = layerPath
+    const containerDirInodes = await this.getContainerParentInodes(containerDir)
     let hostDir = hostWorkdir
 
     while (hostDir !== '/') {
       const hostDirInode = fs.statSync(hostDir).ino
 
-      // Find inode in layerPath and all parents
-      // OPTIM we could run stat on all parent directories in one (find?) command, and store the result in a map
-      let containerDirInode = NaN
-      let containerDir = layerPath
+      let containerIdx = 0
       while (containerDir !== '/') {
-        containerDirInode = await this.getContainerInode(containerDir)
+        const containerDirInode = containerDirInodes[containerIdx]
         logger.debug('Comparing container inodes: ' + containerDir + ':' + containerDirInode + ' ' + hostDir + ':' + hostDirInode)
         if (containerDirInode === hostDirInode) {
           this.containerMountPoint = containerDir
           this.hostMountPoint = hostDir
           return
         }
         containerDir = path.dirname(containerDir)
+        containerIdx++
       }
       hostDir = path.dirname(hostDir)
     }