Use gitoxide for robust diffing

.gitattributes

@@ -0,0 +1,5 @@
+**/generated-archives/*.tar.xz filter=lfs diff=lfs merge=lfs -text
+
+# assure line feeds don't interfere with our working copy hash 
+**/tests/fixtures/*.sh text crlf=input	eol=lf
+

.github/workflows/rust.yml → .github/workflows/ci.yml

@@ -11,6 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v2
+    - run: git lfs fetch && git lfs checkout
     - name: tests
       run: make test
     - name: docs

Cargo.toml

@@ -11,15 +11,21 @@ edition = "2018"
 readme = "changelog.md"
 include = ["src/**/*", "LICENSE.md", "README.md", "CHANGELOG.md"]
 
+[lib]
+test = false
+
 [dependencies]
+git-repository = "0.23.0"
+similar = { version = "2.2.0", features = ["bytes"] }
 serde = { version = "1", features = ["std", "derive"] }
 serde_json = "1"
+thiserror = "1.0.32"
 
 [dependencies.git2]
 version = "0.14.0"
 default-features = false
 features = ["https"]
 
 [dev-dependencies]
+git-testtools = "0.8.0"
 tempdir = "0.3.5"
-serial_test = "0.6.0"

Makefile

@@ -3,18 +3,12 @@ help:  ## Display this help
 
 
 CARGO = $(shell command -v cargo)
-bare_index_path = tests/fixtures/index-bare
-
-$(bare_index_path):
-	mkdir -p $(dir $@)
-	git clone --bare https://github.com/rust-lang/crates.io-index $@
-
 
 ##@ Development
 
-test: $(bare_index_path) ## run all tests with cargo
-	RUST_BACKTRACE=1 CRATES_INDEX_DIFF_TEST_EXISTING_INDEX=$(bare_index_path) cargo test --jobs 1
+test: ## run all tests with cargo
+	RUST_BACKTRACE=1 cargo test --jobs 1
 
-quick-test: $(bare_index_path) ## run all fast tests with cargo (those which dont clone themselves
-	CRATES_INDEX_DIFF_TEST_EXISTING_INDEX=$(bare_index_path) cargo test --jobs 1 quick
+quick-test: ## run all fast tests with cargo (those which dont clone themselves
+	cargo test --jobs 1 quick