Build AppImage from pipeline

azure-pipelines.yml

@@ -70,3 +70,17 @@ jobs:
     displayName: 'Mac build and test'
   dependsOn: Linux
   condition: succeeded()
+- job: AppImage
+  pool:
+    vmImage: ubuntu-16.04
+  steps:
+  - script: azure-pipelines/build-appimage
+    displayName: 'Build AppImage'
+  - task: PublishBuildArtifacts@1
+    inputs:
+      pathtoPublish: '$(System.DefaultWorkingDirectory)/distribution'
+      artifactName: distribution
+    displayName: 'Upload AppImage'
+    condition: eq(variables['System.PullRequest.IsFork'], 'False')
+  dependsOn: Linux
+  condition: succeeded()

azure-pipelines/build-appimage

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -ex
+(cd appimage; docker build -t qpdfbuild .)
+rm -rf /tmp/build
+mkdir -p /tmp/build
+git clone .git /tmp/build/qpdf
+docker run --privileged --rm -v /tmp/build:/tmp/build qpdfbuild
+mkdir distribution
+cp -p /tmp/build/qpdf/appimage/build/qpdf*AppImage* distribution
+for i in distribution/*; do
+    mv $i $(echo $i | sed -e 's/\.AppImage/-ci.AppImage/')
+done
+sha256sum distribution/*