Autocompletion by the TAB button when changing to a child directory #68

Author: alexander-shustanov

src/main/kotlin/com/haulmont/cuba/cli/ShellCli.kt

@@ -61,7 +61,7 @@ class ShellCli(private val commandsRegistry: CommandsRegistry) : Cli {
             command("version", VersionCommand)
             command("exit", ExitCommand)
             command("cd", CdCommand()) {
-                completer(Completers.DirectoriesCompleter(workingDirectoryManager.workingDirectory))
+                completer(DirectoriesCompleter(workingDirectoryManager.workingDirectory))
             }
             command("parameters", ShowNonInteractiveParameters(commandsRegistry))
         }

src/main/kotlin/com/haulmont/cuba/cli/commands/DirectoriesCompleter.kt

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2008-2018 Haulmont.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.haulmont.cuba.cli.commands
+
+import org.jline.builtins.Completers
+import org.jline.reader.Candidate
+import org.jline.reader.LineReader
+import org.jline.reader.ParsedLine
+import java.io.IOException
+import java.nio.file.Files
+import java.nio.file.Path
+
+/**
+ * Replacement of default directories completer for normal work on windows
+ */
+class DirectoriesCompleter(currentDir: Path) : Completers.DirectoriesCompleter(currentDir) {
+    override fun complete(reader: LineReader, commandLine: ParsedLine, candidates: MutableList<Candidate>) {
+        val buffer = commandLine.word().substring(0, commandLine.wordCursor())
+
+        val current: Path
+        val curBuf: String
+        val lastSep = buffer.lastIndexOf("/")
+        if (lastSep >= 0) {
+            curBuf = buffer.substring(0, lastSep + 1)
+            current = if (curBuf.startsWith("~")) {
+                if (curBuf.startsWith("~/")) {
+                    userHome.resolve(curBuf.substring(2))
+                } else {
+                    userHome.parent.resolve(curBuf.substring(1))
+                }
+            } else {
+                userDir.resolve(curBuf)
+            }
+        } else {
+            curBuf = ""
+            current = userDir
+        }
+        try {
+            Files.newDirectoryStream(current) { this.accept(it) }.forEach { p ->
+                val value = curBuf + p.fileName.toString()
+                if (Files.isDirectory(p)) {
+                    candidates.add(Candidate(
+                            value + if (reader.isSet(LineReader.Option.AUTO_PARAM_SLASH)) "/" else "",
+                            getDisplay(reader.terminal, p), null, null,
+                            if (reader.isSet(LineReader.Option.AUTO_REMOVE_SLASH)) "/" else null, null,
+                            false))
+                } else {
+                    candidates.add(Candidate(value, getDisplay(reader.terminal, p), null, null, null, null, true))
+                }
+            }
+        } catch (e: IOException) {
+            // Ignore
+        }
+
+    }
+}