Add Jenkins file

Build [ARM, IAR, GCC_ARM] and test [K64F, NUCLEO_F429ZI].

Author: Marcus Chang

features/minimal-printf/Jenkinsfile

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+// Jenkins configuration.
+properties ([
+    buildDiscarder(
+        logRotator(artifactDaysToKeepStr: '',
+                   artifactNumToKeepStr: '',
+                   daysToKeepStr: '30',
+                   numToKeepStr: '100'
+        )
+    )
+])
+
+// RaaS credentials and settings.
+raas_username = "ci"
+raas_password = "ci"
+raas_timeout = 1200
+
+// Test combinations, for each listed target, each toolchain is build and tested on RaaS instance.
+targets = [
+    "K64F":           ["toolchains": [ "ARM", "IAR", "GCC_ARM"], "raas": "eeva.mbedcloudtesting.com"],
+    "NUCLEO_F429ZI":  ["toolchains": [ "ARM", "IAR", "GCC_ARM"], "raas": "ruka.mbedcloudtesting.com"],
+]
+
+// Map toolchains to compiler labels to find suitable node on Jenkins.
+def nodes = [
+    ARM: "armcc",
+    IAR: "iar_arm",
+    GCC_ARM: "arm-none-eabi-gcc",
+    SXOS: "linux"
+]
+
+// Initial maps for parallel build steps
+def buildStepsForParallel = [:]
+def testStepsForParallel = [:]
+
+for (target in targets.keySet()) {
+    for (toolchain_key in targets[target]["toolchains"]) {
+        echo "Include for build: ${target} ${toolchain_key}"
+
+        def stepName = "${target} ${toolchain_key}"
+        buildStepsForParallel[stepName] = buildStep(target, nodes[toolchain_key], toolchain_key)
+    }
+}
+
+for (target in targets.keySet()) {
+    for (toolchain_key in targets[target]["toolchains"]) {
+        echo "Include for test: ${target} ${toolchain_key}"
+
+        def stepName = "${target} ${toolchain_key}"
+        testStepsForParallel[stepName] = testStep(target, nodes[toolchain_key], toolchain_key)
+    }
+}
+
+// Actually run the steps in parallel - parallel takes a map as an argument, hence the above.
+timestamps {
+    parallel buildStepsForParallel
+    parallel testStepsForParallel
+}
+
+// Create build steps for parallel execution.
+def buildStep(target, compilerLabel, toolchain) {
+    return {
+        stage("Build_${target}_${toolchain}") {
+            node("${compilerLabel}") {
+                deleteDir()
+
+                echo "buildStep: ${target} ${compilerLabel} ${toolchain}"
+                dir("test") {
+
+                    // checkout PR.
+                    checkout scm
+
+                    // checkout newest Mbed OS release.
+                    sh "mbed new ."
+
+                    if (toolchain == "GCC_ARM") {
+                        // use custom release profile from minimal-printf to override functions in GCC.
+                        sh "mbed test -vv --compile -m ${target} -t ${toolchain} -n '*minimal-printf*' --build ci --stats-depth 10 --profile ./profiles/release.json"
+                    } else {
+                        // use default release profile for ARM and IAR.
+                        sh "mbed test -vv --compile -m ${target} -t ${toolchain} -n '*minimal-printf*' --build ci --stats-depth 10"
+                    }
+
+                    // stash build directory for testins step.
+                    stash name: "minimal-printf-greentea-${target}-${toolchain}", includes: "ci/**"
+                }
+
+                step([$class: 'WsCleanup'])
+            }
+        }
+    }
+}
+
+def testStep(target, compilerLabel, toolchain) {
+    return {
+        stage("Light suite ${target}_${toolchain}") {
+            node("${compilerLabel}") {
+                deleteDir()
+
+                echo "testStep: ${target} ${toolchain}"
+
+                // unstash build directory containing greentea tests.
+                unstash "minimal-printf-greentea-${target}-${toolchain}"
+
+                // setup RaaS environment.
+                env.RAAS_USERNAME = raas_username
+                env.RAAS_PASSWORD = raas_password
+                env.RAAS_PYCLIENT_FORCE_REMOTE_ALLOCATION = 1
+                env.RAAS_PYCLIENT_ALLOCATION_QUEUE_TIMEOUT = raas_timeout
+
+                raas = targets[target]["raas"]
+
+                // execute greentea on RaaS.
+                execute("mbedgt --grm ${target}:raas_client:${raas}:80 -vV --test-spec ./ci/test_spec.json --polling-timeout 240")
+
+                // Clean up workarea.
+                step([$class: 'WsCleanup'])
+            }
+        }
+    }
+}