Add edit command (#874)

* Add edit command
* Fix failing test
* Prevent EDITOR from being overwritten
* Split up error message
* Add missing test case

Co-authored-by: Oliver Weiler <oliver.weiler@meinestadt.de>

src/main/bash/sdkman-edit.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+#
+#   Copyright 2017 Marco Vermeulen
+#
+#   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.
+#
+
+function __sdk_edit() {
+	local -r editor=${EDITOR:=vi}
+
+	if ! command -v "$editor" > /dev/null; then
+		__sdkman_echo_red "No default editor configured."
+		__sdkman_echo_yellow "Please set the default editor with the EDITOR environment variable."
+
+		return 1
+	fi
+
+	"$editor" "${SDKMAN_DIR}/etc/config"
+}

src/main/bash/sdkman-main.sh

@@ -118,7 +118,7 @@ function sdk() {
 
 	# Check whether the candidate exists
 	local sdkman_valid_candidate=$(echo ${SDKMAN_CANDIDATES[@]} | grep -w "$QUALIFIER")
-	if [[ -n "$QUALIFIER" && "$COMMAND" != "offline" && "$COMMAND" != "flush" && "$COMMAND" != "selfupdate" && "$COMMAND" != "env" && "$COMMAND" != "completion" && -z "$sdkman_valid_candidate" ]]; then
+	if [[ -n "$QUALIFIER" && "$COMMAND" != "offline" && "$COMMAND" != "flush" && "$COMMAND" != "selfupdate" && "$COMMAND" != "env" && "$COMMAND" != "completion" && "$COMMAND" != "edit" && -z "$sdkman_valid_candidate" ]]; then
 		echo ""
 		__sdkman_echo_red "Stop! $QUALIFIER is not a valid candidate."
 		return 1

src/test/groovy/sdkman/specs/EditCommandSpec.groovy

@@ -0,0 +1,43 @@
+package sdkman.specs
+
+import sdkman.support.SdkmanEnvSpecification
+
+class EditCommandSpec extends SdkmanEnvSpecification {
+	def "it should open the config in the system's default editor"() {
+		given:
+		bash = sdkmanBashEnvBuilder
+				.withVersionCache("x.y.z")
+				.withOfflineMode(true)
+				.build()
+
+		bash.start()
+		bash.execute("source $bootstrapScript")
+
+		when:
+		setupEnv(bash)
+		bash.execute("sdk edit")
+
+		then:
+		verifyOutput(bash.output, sdkmanBaseDirectory)
+
+		where:
+		setupEnv << [
+			{
+				it.execute('nano() { echo "nano was called with $1"; }')
+				it.execute("EDITOR=nano")
+			},
+			{
+				it.execute('vi() { echo "vi was called with $1"; }')
+				it.execute("unset EDITOR")
+			},
+			{
+				it.execute("EDITOR=/does/not/exist")
+			}
+		]
+		verifyOutput << [
+			{ output, baseDirectory -> output.contains("nano was called with ${baseDirectory}/.sdkman/etc/config") },
+			{ output, baseDirectory -> output.contains("vi was called with ${baseDirectory}/.sdkman/etc/config") },
+			{ output, _ -> output.contains("No default editor configured.") }
+		]
+	}
+}