Retrieve command can now take a filename to load an ID from.

Author: almacken

src/main/scala/de/upb/cs/swt/delphi/cli/DelphiCLI.scala

@@ -26,7 +26,9 @@ object DelphiCLI extends App {
       cmd("retrieve").action((s,c) => c.copy(mode = "retrieve"))
         .text("Retrieve a project's description, specified by ID.")
         .children(
-          arg[String]("ID").action((x, c) => c.copy(args = List(x))).text("The ID of the project to retrieve")
+          arg[String]("ID").action((x, c) => c.copy(args = List(x))).text("The ID of the project to retrieve"),
+          opt[Unit]('f', "file").action((_, c) => c.copy(opts = List("file"))).text("Use to load the ID from file, " +
+            "with the filepath given in place of the ID")
         )
 
       //cmd("search")

src/main/scala/de/upb/cs/swt/delphi/cli/commands/RetrieveCommand.scala

@@ -1,14 +1,27 @@
 package de.upb.cs.swt.delphi.cli.commands
 
 import de.upb.cs.swt.delphi.cli.Config
+import io.Source
 
 /**
   * The implementation of the retrieve command.
   * Retrieves the contents of the file at the endpoint specified by the config file, and prints them to stdout
   */
 object RetrieveCommand extends Command {
-  override def execute(config: Config): Unit = executeGet(
-    "/retrieve/" + config.args.head,
-    s => println(s)
-  )(config)
+  override def execute(config: Config): Unit = {
+    //Checks whether the ID should be loaded from a file or not, and either returns the first line
+    //  of the given file if it is, or the specified ID otherwise
+    def checkTarget: String = {
+      if (config.opts.contains("file")) {
+        val source = Source.fromFile(config.args.head)
+        val target = source.getLines.next()
+        source.close()
+        target
+      } else config.args.head
+    }
+    executeGet(
+      "/retrieve/" + checkTarget,
+      s => println(s)
+    )(config)
+  }
 }