ci: various Cirrus CI test fixes (#844)

Some cache and conditional fixes for Cirrus CI testing. The test tasks should only run on the default branch and on PRs.

.cirrus.yml

@@ -1,5 +1,5 @@
 # Configuration for CirrusCI. This is primarily used for
-# FreeBSD and macOS M1 testing and building.
+# FreeBSD and macOS M1 tests and builds.
 
 env:
   CARGO_INCREMENTAL: 0
@@ -7,52 +7,75 @@ env:
   CARGO_HUSKY_DONT_INSTALL_HOOKS: true
 
 task:
-  name: FreeBSD 13 Test
+  name: "FreeBSD 13 Test"
+  only_if: $CIRRUS_BRANCH == "master" || $CIRRUS_PR != ""
   freebsd_instance:
     image_family: freebsd-13-1
+  matrix:
+    - env:
+        FEATURES: "--all-features"
+    - env:
+        FEATURES: "--no-default-features"
   setup_script:
-    - pkg install -y curl
     - curl https://sh.rustup.rs -sSf --output rustup.sh
     - sh rustup.sh --default-toolchain stable -y
     - . $HOME/.cargo/env
     - rustc --version
   registry_cache:
-    folder: $CARGO_HOME/registry
-    fingerprint_script: cat Cargo.lock
+    folder: $HOME/.cargo/registry
+    reupload_on_changes: true
+    fingerprint_script: md5 Cargo.lock
   target_cache:
     folder: target
+    reupload_on_changes: true
     fingerprint_script:
       - . $HOME/.cargo/env && rustc --version
-      - cat Cargo.lock
+      - md5 Cargo.lock
+      - echo $FEATURES
   test_script:
     - . $HOME/.cargo/env
     - cargo fmt --all -- --check
-    - cargo test --no-run --locked
-    - cargo test --no-fail-fast -- --nocapture --quiet
-    - cargo clippy --all-targets --workspace -- -D warnings
-  before_cache_script: rm -rf $CARGO_HOME/registry/index
+    - cargo test --no-run --locked $FEATURES
+    - cargo test --no-fail-fast $FEATURES -- --nocapture --quiet 
+    - cargo clippy --all-targets --workspace $FEATURES -- -D warnings
+  before_cache_script:
+    - rm -rf $HOME/.cargo/registry/index
+    - rm -f ./target/.rustc_info.json
+    - find ./target/debug -maxdepth 1 -type f -delete # Delete stray files
 
 task:
-  name: macOS M1 Test
+  name: "macOS M1 Test"
+  only_if: $CIRRUS_BRANCH == "master" || $CIRRUS_PR != ""
   macos_instance:
     image: ghcr.io/cirruslabs/macos-monterey-base:latest
+  matrix:
+    - env:
+        FEATURES: "--all-features"
+    - env:
+        FEATURES: "--no-default-features"
   setup_script:
     - curl https://sh.rustup.rs -sSf --output rustup.sh
     - sh rustup.sh --default-toolchain stable -y
     - source $HOME/.cargo/env
     - rustc --version
   registry_cache:
-    folder: $CARGO_HOME/registry
-    fingerprint_script: cat Cargo.lock
+    folder: $HOME/.cargo/registry
+    reupload_on_changes: true
+    fingerprint_script: md5 Cargo.lock
   target_cache:
     folder: target
+    reupload_on_changes: true
     fingerprint_script:
       - source $HOME/.cargo/env && rustc --version
-      - cat Cargo.lock
+      - md5 Cargo.lock
+      - echo $FEATURES
   test_script:
-    - source $HOME/.cargo/env
+    - . $HOME/.cargo/env
     - cargo fmt --all -- --check
-    - cargo test --no-run --locked
-    - cargo test --no-fail-fast -- --nocapture --quiet
-    - cargo clippy --all-targets --workspace -- -D warnings
-  before_cache_script: rm -rf $CARGO_HOME/registry/index
+    - cargo test --no-run --locked $FEATURES
+    - cargo test --no-fail-fast $FEATURES -- --nocapture --quiet 
+    - cargo clippy --all-targets --workspace $FEATURES -- -D warnings
+  before_cache_script:
+    - rm -rf $HOME/.cargo/registry/index
+    - rm -f ./target/.rustc_info.json
+    - find ./target/debug -maxdepth 1 -type f -delete # Delete stray files