RUST-546 Automate driver releases (#264)

Author: saghm

.evergreen/release-danger-do-not-run-manually.sh

@@ -0,0 +1,29 @@
+# ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢
+# # Danger!
+#
+# This script is used to publish a release of the driver to crates.io.
+#
+# Do not run it manually!
+# ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠ ☢ ☠
+
+# Disable tracing
+set +x
+
+set -o errexit
+
+if [[ -z "$TAG" ]]; then
+	>&2 echo "\$TAG must be set to the git tag of the release"
+	exit 1
+fi
+
+if [[ -z "$TOKEN" ]]; then
+	>&2 echo "\$TOKEN must be set to the crates.io authentication token"
+	exit 1
+fi
+
+git fetch origin $TAG
+git checkout $TAG
+
+. ~/.cargo/env
+
+cargo publish --token $TOKEN

.evergreen/releases.yml

@@ -0,0 +1,55 @@
+exec_timeout_secs: 3600 
+
+functions:
+  "fetch source":
+    - command: git.get_project
+      type: system
+      params:
+        directory: "src"
+
+  "install dependencies":
+    command: shell.exec
+    params:
+      working_dir: "src"
+      script: |
+        ${PREPARE_SHELL}
+        .evergreen/install-dependencies.sh
+
+  "publish release":
+    - command: shell.exec
+      type: test
+      params:
+        working_dir: "src"
+        script: |
+          set +x
+
+          TAG=${GIT_TAG}           \
+          TOKEN=${CRATES_IO_TOKEN} \
+            bash .evergreen/release-danger-do-not-run-manually.sh
+
+tasks:
+  - name: "publish-release"
+    commands:
+      - func: "fetch source"
+      - func: "install dependencies"
+      - func: "publish release"
+        vars:
+          GIT_TAG: ${triggered_by_git_tag}
+
+axes:
+  - id: "os"
+    display_name: OS
+    values:
+      - id: ubuntu-16.04
+        display_name: "Ubuntu 16.04"
+        run_on: ubuntu1604-test
+
+buildvariants:
+-
+  matrix_name: "release"
+  matrix_spec:
+    os:
+      - ubuntu-16.04
+  display_name: "Publish driver release"
+  tasks:
+    - "publish-release"