numerous CI improvements =u=

- run clippy before all other tasks
- deny on clippy warnings when running in CI
- build and test both xdg and infer backends
- make sure "fif -V" actually works

.gitlab-ci.yml

@@ -11,23 +11,42 @@ cache:
 default:
   before_script:
     - rustc --version
+    - cargo version
 
 stages:
+  - lint
   - build
   - test
-
+  - version
-build:
-  stage: build
-  script:
-    - cargo build --verbose --locked
-
-cargo-test:
-  stage: test
-  script:
-    cargo test --verbose --locked
 
 clippy:
-  stage: test
+  stage: lint
   script:
     - rustup component add clippy
-    - ./clippy.sh
+    - cargo clippy --version
+    - ./clippy.sh ci
+
+xdg-backend:
+  stage: build
+  script:
+    - cargo build --features=xdg-mime-backend --locked
+
+mime-backend:
+  stage: build
+  script:
+    cargo build --features=infer-backend --locked
+
+cargo-test-xdg:
+  stage: test
+  script:
+    cargo test --features=xdg-mime-backend --verbose --locked
+
+cargo-test-infer:
+  stage: test
+  script:
+    cargo test --features=infer-backend --verbose --locked
+
+fif-version:
+  stage: version
+  script:
+    cargo run -- -V

clippy.sh

@@ -1,5 +1,15 @@
 #!/bin/bash
-fd -e rs -x touch {}
+set -e
+
+_extra=""
+if [ "$1" == "ci" ]; then
+  # deny on warnings when running in CI
+ _extra="-Dwarnings"
+fi
+
+# allow find to fail
+find . -name '*.rs' -exec touch "{}" \; || true
+
 cargo clippy --all-features --tests -- \
  -W clippy::nursery \
  -W clippy::perf \
@@ -14,7 +24,8 @@ cargo clippy --all-features --tests -- \
  -A clippy::unused_io_amount \
  -A clippy::redundant_closure_for_method_calls \
  -A clippy::shadow_unrelated \
- -A clippy::option_if_let_else
+ -A clippy::option_if_let_else \
+ "$_extra"
 
 # ALLOWS:
 # unused_io_amount: there are two places where i want to read up to X bytes and i'm fine with getting less than that