chore(ci): add end-of-file newline checks recipe

.github/workflows/cargo_build.yml

@@ -23,6 +23,16 @@ jobs:
     steps:
       - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
 
+      - name: Install and run newline linter checks
+        if: matrix.os == 'ubuntu-latest'
+        run: |
+          wget https://github.com/fernandrone/linelint/releases/download/0.0.6/linelint-linux-amd64
+          echo "16b70fb7b471d6f95cbdc0b4e5dc2b0ac9e84ba9ecdc488f7bdf13df823aca4b linelint-linux-amd64" > checksum
+          sha256sum -c checksum || exit 1
+          chmod +x linelint-linux-amd64
+          mv linelint-linux-amd64 /usr/local/bin/linelint
+          make check_newline
+
       - name: Run pcc checks
         run: |
           make pcc

.linelint.yml

@@ -0,0 +1,14 @@
+ignore:
+  - .git
+  - target
+  - tfhe/benchmarks_parameters
+  - tfhe/web_wasm_parallel_tests/node_modules
+  - tfhe/web_wasm_parallel_tests/dist
+  - keys
+  - coverage
+
+rules:
+  # checks if file ends in a newline character
+  end-of-file:
+    enable: true
+    single-new-line: true

Makefile

@@ -102,14 +102,27 @@ install_tarpaulin: install_rs_build_toolchain
 	cargo $(CARGO_RS_BUILD_TOOLCHAIN) install cargo-tarpaulin --locked || \
 	( echo "Unable to install cargo tarpaulin, unknown error." && exit 1 )
 
+.PHONY: check_linelint_installed # Check if linelint newline linter is installed
+check_linelint_installed:
+	@printf "\n" | linelint - > /dev/null 2>&1 || \
+	( echo "Unable to locate linelint. Try installing it:  https://github.com/fernandrone/linelint/releases" && exit 1 )
+
 .PHONY: fmt # Format rust code
 fmt: install_rs_check_toolchain
 	cargo "$(CARGO_RS_CHECK_TOOLCHAIN)" fmt
 
-.PHONT: check_fmt # Check rust code format
+.PHONY: check_fmt # Check rust code format
 check_fmt: install_rs_check_toolchain
 	cargo "$(CARGO_RS_CHECK_TOOLCHAIN)" fmt --check
 
+.PHONY: fix_newline # Fix newline at end of file issues to be UNIX compliant
+fix_newline: check_linelint_installed
+	linelint -a .
+
+.PHONY: check_newline # Check for newline at end of file to be UNIX compliant
+check_newline: check_linelint_installed
+	linelint .
+
 .PHONY: clippy_core # Run clippy lints on core_crypto with and without experimental features
 clippy_core: install_rs_check_toolchain
 	RUSTFLAGS="$(RUSTFLAGS)" cargo "$(CARGO_RS_CHECK_TOOLCHAIN)" clippy \
@@ -604,7 +617,7 @@ pcc: no_tfhe_typo no_dbg_log check_fmt lint_doc clippy_all check_compile_tests
 fpcc: no_tfhe_typo no_dbg_log check_fmt lint_doc clippy_fast check_compile_tests
 
 .PHONY: conformance # Automatically fix problems that can be fixed
-conformance: fmt
+conformance: fix_newline fmt
 
 .PHONY: help # Generate list of targets with descriptions
 help: