Use Azure Pipelines dependsOn to stage the jobs

azure-pipelines.yml

@@ -10,7 +10,22 @@ trigger: ["master"]
 pr: ["master"]
 
 jobs:
-  - job: DockerLinux
+  - job: DockerLinuxTier1
+    pool:
+      vmImage: ubuntu-16.04
+    steps:
+      - template: ci/azure-install-rust.yml
+      - bash: sh ./ci/run-docker.sh $TARGET
+        displayName: Execute run-docker.sh
+    strategy:
+      matrix:
+        i686-unknown-linux-gnu:
+          TARGET: i686-unknown-linux-gnu
+        x86_64-unknown-linux-gnu:
+          TARGET: x86_64-unknown-linux-gnu
+
+  - job: DockerLinuxTier2
+    dependsOn: DockerLinuxTier1
     pool:
       vmImage: ubuntu-16.04
     steps:
@@ -35,8 +50,6 @@ jobs:
           TARGET: asmjs-unknown-emscripten
         i686-linux-android:
           TARGET: i686-linux-android
-        i686-unknown-linux-gnu:
-          TARGET: i686-unknown-linux-gnu
         i686-unknown-linux-musl:
           TARGET: i686-unknown-linux-musl
         mips-unknown-linux-gnu:
@@ -65,8 +78,6 @@ jobs:
           TARGET: wasm32-unknown-emscripten
         x86_64-linux-android:
           TARGET: x86_64-linux-android
-        x86_64-unknown-linux-gnu:
-          TARGET: x86_64-unknown-linux-gnu
         x86_64-unknown-linux-gnux32:
           TARGET: x86_64-unknown-linux-gnux32
         x86_64-unknown-linux-musl:
@@ -132,6 +143,7 @@ jobs:
           deploy_dir: target/doc
 
   #- job: SemverLinux
+  #  dependsOn: BuildChannelsLinux
   #  continueOnError: true
   #  pool:
   #    vmImage: ubuntu-16.04
@@ -141,6 +153,7 @@ jobs:
   #      displayName: Check breaking changes
 
   #- job: SemverOSX
+  #  dependsOn: BuildChannelsOSX
   #  continueOnError: true
   #  pool:
   #    vmImage: macos-10.14
@@ -150,6 +163,7 @@ jobs:
   #      displayName: Check breaking changes
 
   - job: BuildChannelsLinux
+    dependsOn: StyleAndDocs
     pool:
       vmImage: ubuntu-16.04
     steps:
@@ -178,6 +192,7 @@ jobs:
       OS: linux
 
   - job: BuildChannelsOSX
+    dependsOn: StyleAndDocs
     pool:
       vmImage: macos-10.13
     steps: