Adding Pipeline to publish SNAPSHOT for each module

[skip ci]

module-snapshot-publishing.yml

@@ -0,0 +1,107 @@
+# This pipeline produces a SNAPSHOT build for each of the sub modules in
+# the core library, and publishes them to ossrh. 
+trigger:
+  - master
+
+strategy:
+  matrix:
+    dstu2:
+      module: "org.hl7.fhir.dstu2"
+    dstu3:
+      module: "org.hl7.fhir.dstu3"
+    dstu2016may:
+      module: "org.hl7.fhir.dstu2016may"
+    r4:
+      module: "org.hl7.fhir.r4"
+    r5:
+      module: "org.hl7.fhir.r5"
+    validator:
+      module: "org.hl7.fhir.validation"
+  maxParallel: 3
+
+pool:
+  vmImage: "ubuntu-16.04"
+
+variables:
+  currentModule: $(module)
+
+steps:
+  # Debugging output to identify current module.
+  - bash: echo Publishing SNAPSHOT for $(module)
+
+  # Signing, for now, occurs for all builds, SNAPSHOT or release. So we need a valid
+  # signing key. The next two steps download the public and private keys from the
+  # secure library files. 
+  - task: DownloadSecureFile@1
+    displayName: 'Download public key.'
+    inputs:
+      secureFile: public.key
+
+  - task: DownloadSecureFile@1
+    displayName: 'Download private key.'
+    inputs:
+      secureFile: private.key
+
+  # Import both the private and public keys into gpg for signing.
+  - bash: |
+      gpg --import --no-tty --batch --yes $(Agent.TempDirectory)/public.key
+      gpg --import --no-tty --batch --yes $(Agent.TempDirectory)/private.key
+      gpg --list-keys --keyid-format LONG
+      gpg --list-secret-keys --keyid-format LONG
+    displayName: 'Import signing keys.'
+
+  # For creating the snapshot release with maven, we need to build a fake settings.xml 
+  # for it to read from. This is done for the master branch merges only.
+  - bash: |
+      cat >$(System.DefaultWorkingDirectory)/settings.xml <<EOL
+      <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                                    https://maven.apache.org/xsd/settings-1.0.0.xsd">
+        <servers>
+          <server>
+            <id>ossrh</id>
+            <username>$(SONATYPE_USER)</username>
+            <password>$(SONATYPE_PASS)</password>
+          </server>
+          <server>
+            <id>sonatype-nexus-snapshots</id>
+            <username>$(SONATYPE_USER)</username>
+            <password>$(SONATYPE_PASS)</password>
+          </server>
+          <server>
+            <id>sonatype-nexus-staging</id>
+            <username>$(SONATYPE_USER)</username>
+            <password>$(SONATYPE_PASS)</password>
+          </server>
+          <server>
+              <id>$(PGP_KEYNAME)</id>
+              <passphrase>$(PGP_PASSPHRASE)</passphrase>
+          </server>
+        </servers>
+        <profiles>
+          <profile>
+            <id>release</id>
+            <activation>
+              <activeByDefault>true</activeByDefault>
+            </activation>
+            <properties>
+              <gpg.keyname>$(PGP_KEYNAME)</gpg.keyname>
+            </properties>
+          </profile>
+        </profiles>
+      </settings>
+      EOL
+    displayName: 'Create .mvn/settings.xml'
+    condition: and(eq(variables.currentImage, 'ubuntu-16.04'), eq(variables['Build.SourceBranch'], 'refs/heads/master'))
+
+  # Deploy the SNAPSHOT artifact to sonatype nexus.
+  # This is done for the master branch merges only.
+  - task: Maven@3
+    displayName: 'Deploy $(version) to Sonatype staging'
+    condition: and(eq(variables.currentImage, 'ubuntu-16.04'), eq(variables['Build.SourceBranch'], 'refs/heads/master'))
+    inputs:
+      mavenPomFile: '$(System.DefaultWorkingDirectory)/$(module)/pom.xml'
+      goals: deploy
+      options: '--settings $(System.DefaultWorkingDirectory)/settings.xml '
+      publishJUnitResults: false