remove stored build files

libs/remix-core-plugin/src/lib/compiler-metadata.ts

@@ -47,6 +47,20 @@ export class CompilerMetadata extends Plugin {
     })
   }
 
+  // Access each file in build-info, check the input sources
+  // If they are all same as in current compiled file and sources includes the path of compiled file, remove old build file
+  async removeStoredBuildInfo (currentInput, path, filePath) {
+    const allBuildFiles = await this.call('fileManager', 'fileList', this.joinPath(path, this.innerPath, 'build-info/'))
+    const currentInputFileNames = Object.keys(currentInput.sources)
+    for (const fileName of allBuildFiles) {
+      let fileContent = await this.call('fileManager', 'readFile', fileName)
+      fileContent = JSON.parse(fileContent)
+      const inputFiles = Object.keys(fileContent.input.sources)
+      const inputIntersection = currentInputFileNames.filter(element => !inputFiles.includes(element))
+      if (inputIntersection.length === 0 && inputFiles.includes(filePath)) await this.call('fileManager', 'remove', fileName)
+    }
+  }
+
   async setBuildInfo (version, input, output, path, filePath) {
     input = JSON.parse(input)
     const solcLongVersion = version.replace('.Emscripten.clang', '')
@@ -60,15 +74,18 @@ export class CompilerMetadata extends Plugin {
     })
     const id =  createHash('md5').update(Buffer.from(json)).digest().toString('hex')
     const buildFilename = this.joinPath(path, this.innerPath, 'build-info/' +  id + '.json')
+    // If there are no file in buildInfoNames,it means compilation is running first time after loading Remix
     if (!this.buildInfoNames[filePath]) {
+      // Check the existing build-info and delete all the previous build files for compiled file
+      await this.removeStoredBuildInfo(input, path, filePath)
       this.buildInfoNames[filePath] = buildFilename
       const buildData = {id, _format: format, solcVersion, solcLongVersion, input, output}
       await this.call('fileManager', 'writeFile', buildFilename, JSON.stringify(buildData, null, '\t'))
     } else if (this.buildInfoNames[filePath] && this.buildInfoNames[filePath] !== buildFilename) {
-      await this.call('fileManager', 'remove', this.buildInfoNames[filePath])
-      this.buildInfoNames[filePath] = buildFilename
-      const buildData = {id, _format: format, solcVersion, solcLongVersion, input, output}
-      await this.call('fileManager', 'writeFile', buildFilename, JSON.stringify(buildData, null, '\t'))
+        await this.call('fileManager', 'remove', this.buildInfoNames[filePath])
+        this.buildInfoNames[filePath] = buildFilename
+        const buildData = {id, _format: format, solcVersion, solcLongVersion, input, output}
+        await this.call('fileManager', 'writeFile', buildFilename, JSON.stringify(buildData, null, '\t'))
     }
   }