coverage: add coverage task

Author: mathstuf

.cirrus.yml

@@ -44,3 +44,21 @@ minimal_version_task:
         fingerprint_script: cat Cargo.lock
     build_script: cargo build
     before_cache_script: rm -rf $CARGO_HOME/registry/index
+
+coverage_task:
+    container:
+        image: rust:latest
+    environment:
+        CODECOV_TOKEN: ENCRYPTED[1e221ef78a37c960613ff80db7141f3158e3218031934395466f4720f450b7acfd74e587819435ce9be0b13fa1b68f1b]
+    keyutils_script: apt-get update && apt-get install libkeyutils-dev
+    tarpaulin_cache:
+        folder: $CARGO_HOME/bin
+        populate_script: cargo install --version 0.8.7 cargo-tarpaulin
+        fingerprint_script: cargo install --list
+    lockfile_script: cargo generate-lockfile
+    cargo_cache:
+        folder: $CARGO_HOME/registry
+        fingerprint_script: cat Cargo.lock
+    coverage_script: cargo tarpaulin --out Xml
+    upload_script: bash <(curl -s https://codecov.io/bash) -X gcov
+    before_cache_script: rm -rf $CARGO_HOME/registry/index