feature: code coverage support (#1064)

Signed-off-by: Ali Caglayan <alizter@gmail.com>

.github/workflows/build-and-test.yml

@@ -63,3 +63,34 @@ jobs:
 
       - name: Run the template integration tests
         run: opam exec -- make test-e2e
+
+  coverage:
+    name: Coverage
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ocaml-compiler:
+          - 4.14.x
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use OCaml ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          opam-depext: false
+
+      - name: Set git user
+        run: |
+          git config --global user.name github-actions[bot]
+          git config --global user.email github-actions[bot]@users.noreply.github.com
+    
+      - name: Install deps on Unix
+        run: |
+          opam install . --deps-only
+          opam exec -- make coverage-deps install-test-deps
+      - run: opam exec -- make test-coverage
+        continue-on-error: true
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          PULL_REQUEST_NUMBER: ${{ github.event.number }}

Makefile

@@ -93,3 +93,12 @@ nix-fmt:
 	$(MAKE) yarn-install
 	dune build @fmt --auto-promote
 	cd $(TEST_E2E_DIR) && yarn fmt
+
+.PHONY: coverage-deps
+coverage-deps:
+	opam install -y bisect_ppx
+
+.PHONY: test-coverage
+test-coverage:
+	dune build --instrument-with bisect_ppx --force @lsp/test/runtest @lsp-fiber/runtest @jsonrpc-fiber/runtest @ocaml-lsp-server/runtest
+	bisect-ppx-report send-to Coveralls

README.md

@@ -1,7 +1,13 @@
 # OCaml-LSP <!-- omit from toc -->
 <!-- TOC is updated automatically by "Markdown All in One" vscode extension -->
 
-[![Build](https://github.com/ocaml/ocaml-lsp/workflows/Build%20and%20Test/badge.svg)](https://github.com/ocaml/ocaml-lsp/actions)
+[![Build][build-badge]][build]
+[![Coverage Status][coverall-badge]][coverall]
+
+[build-badge]: https://github.com/ocaml/ocaml-lsp/workflows/Build%20and%20Test/badge.svg
+[build]: https://github.com/ocaml/ocaml-lsp/actions
+[coverall-badge]: https://coveralls.io/repos/github/ocaml/ocaml-lsp/badge.svg?branch=master
+[coverall]: https://coveralls.io/github/ocaml/ocaml-lsp?branch=master
 
 OCaml-LSP is a language server for OCaml that implements [Language Server
 Protocol](https://microsoft.github.io/language-server-protocol/) (LSP).
@@ -27,6 +33,7 @@ Protocol](https://microsoft.github.io/language-server-protocol/) (LSP).
   - [Unusual features](#unusual-features)
 - [Debugging](#debugging)
 - [Contributing to project](#contributing-to-project)
+  - [Changelog](#changelog)
 - [Tests](#tests)
 - [Relationship to Other Tools](#relationship-to-other-tools)
 - [History](#history)

jsonrpc-fiber/src/dune

@@ -1,3 +1,5 @@
 (library
  (name jsonrpc_fiber)
- (libraries fiber dyn jsonrpc ppx_yojson_conv_lib stdune yojson))
+ (libraries fiber dyn jsonrpc ppx_yojson_conv_lib stdune yojson)
+ (instrumentation
+  (backend bisect_ppx)))

jsonrpc/src/dune

@@ -1,2 +1,4 @@
 (library
- (public_name jsonrpc))
+ (public_name jsonrpc)
+ (instrumentation
+  (backend bisect_ppx)))

lsp-fiber/src/dune

@@ -9,4 +9,6 @@
   lsp
   ppx_yojson_conv_lib
   stdune
-  yojson))
+  yojson)
+ (instrumentation
+  (backend bisect_ppx)))

lsp/src/dune

@@ -5,7 +5,9 @@
  (public_name lsp)
  (libraries jsonrpc ppx_yojson_conv_lib uutf yojson)
  (lint
-  (pps ppx_yojson_conv)))
+  (pps ppx_yojson_conv))
+ (instrumentation
+  (backend bisect_ppx)))
 
 (cinaps
  (files types.ml types.mli)

ocaml-lsp-server/bin/dune

@@ -2,4 +2,6 @@
  (name main)
  (package ocaml-lsp-server)
  (public_name ocamllsp)
- (libraries dune-build-info stdune lsp ocaml_lsp_server))
+ (libraries dune-build-info stdune lsp ocaml_lsp_server)
+ (instrumentation
+  (backend bisect_ppx)))

ocaml-lsp-server/src/dune

@@ -36,6 +36,8 @@
   ocamlformat-rpc-lib
   ocamlc-loc)
  (lint
-  (pps ppx_yojson_conv)))
+  (pps ppx_yojson_conv))
+ (instrumentation
+  (backend bisect_ppx)))
 
 (include_subdirs unqualified)

submodules/lev/.github/workflows/workflow.yml

@@ -38,3 +38,4 @@ jobs:
       - run: opam install --deps-only --with-doc --with-test .
       - run: opam exec -- dune build
       - run: opam exec -- dune runtest
+