[FIXED JENKINS-41668] Add "dir" option for Dockerfile.

pipeline-model-definition/src/main/java/org/jenkinsci/plugins/pipeline/modeldefinition/agent/impl/DockerPipelineFromDockerfile.java

@@ -38,6 +38,7 @@
 
 public class DockerPipelineFromDockerfile extends AbstractDockerAgent<DockerPipelineFromDockerfile> {
     private String filename;
+    private String dir;
 
     @DataBoundConstructor
     public DockerPipelineFromDockerfile() {
@@ -52,6 +53,23 @@ public void setFilename(String filename) {
         this.filename = filename;
     }
 
+    public @Nonnull String getDir() {
+        return dir;
+    }
+
+    @DataBoundSetter
+    public void setDir(String dir) {
+        this.dir = dir;
+    }
+
+    public String getActualDir() {
+        if (dir != null) {
+            return dir;
+        } else {
+            return ".";
+        }
+    }
+
     public String getDockerfileAsString() {
         if (filename != null) {
             return filename;

pipeline-model-definition/src/main/resources/org/jenkinsci/plugins/pipeline/modeldefinition/agent/impl/DockerPipelineFromDockerfileScript.groovy

@@ -77,7 +77,7 @@ public class DockerPipelineFromDockerfileScript extends AbstractDockerPipelineSc
             try {
                 def hash = Utils.stringToSHA1(script.readFile(describable.getDockerfileAsString()))
                 def imgName = "${hash}"
-                return script.getProperty("docker").build(imgName, "-f ${describable.getDockerfileAsString()} .")
+                return script.getProperty("docker").build(imgName, "-f ${describable.getDockerfileAsString()} ${describable.getActualDir()}")
             } catch (FileNotFoundException f) {
                 script.error("No Dockerfile found at root of repository - failing.")
                 return null

pipeline-model-definition/src/test/java/org/jenkinsci/plugins/pipeline/modeldefinition/AgentTest.java

@@ -160,6 +160,26 @@ public void fromDockerfile() throws Exception {
                 .go();
     }
 
+    @Issue("JENKINS-41668")
+    @Test
+    public void fromDockerfileInOtherDir() throws Exception {
+        assumeDocker();
+        // Bind mounting /var on OS X doesn't work at the moment
+        onAllowedOS(PossibleOS.LINUX);
+
+        sampleRepo.write("subdir/Dockerfile", "FROM ubuntu:14.04\n\nRUN echo 'HI THERE' > /hi-there\n\n");
+        sampleRepo.git("init");
+        sampleRepo.git("add", "Dockerfile");
+        sampleRepo.git("commit", "--message=Dockerfile");
+
+        expect("fromDockerfileInOtherDir")
+                .logContains("[Pipeline] { (foo)",
+                        "The answer is 42",
+                        "-v /tmp:/tmp -p 8000:8000",
+                        "HI THERE")
+                .go();
+    }
+
     @Test
     public void fromDockerfileNoArgs() throws Exception {
         assumeDocker();

pipeline-model-definition/src/test/resources/fromDockerfileInOtherDir.groovy

@@ -0,0 +1,43 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2017, CloudBees, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+pipeline {
+    agent {
+        dockerfile {
+            args "-v /tmp:/tmp -p 8000:8000"
+            dir "subdir"
+        }
+    }
+    stages {
+        stage("foo") {
+            steps {
+                sh 'cat /hi-there'
+                sh 'echo "The answer is 42"'
+            }
+        }
+    }
+}
+
+
+