Add lint-go-gopls

Makefile

@@ -36,6 +36,7 @@ XGO_PACKAGE ?= src.techknowlogick.com/xgo@latest
 GO_LICENSES_PACKAGE ?= github.com/google/go-licenses@v1
 GOVULNCHECK_PACKAGE ?= golang.org/x/vuln/cmd/govulncheck@v1
 ACTIONLINT_PACKAGE ?= github.com/rhysd/actionlint/cmd/actionlint@v1
+GOPLS_PACKAGE ?= golang.org/x/tools/gopls@v0.15.3
 
 DOCKER_IMAGE ?= gitea/gitea
 DOCKER_TAG ?= latest
@@ -213,6 +214,7 @@ help:
 	@echo " - lint-go                          lint go files"
 	@echo " - lint-go-fix                      lint go files and fix issues"
 	@echo " - lint-go-vet                      lint go files with vet"
+	@echo " - lint-go-gopls                    lint go files with gopls"
 	@echo " - lint-js                          lint js files"
 	@echo " - lint-js-fix                      lint js files and fix issues"
 	@echo " - lint-css                         lint css files"
@@ -366,7 +368,7 @@ lint-frontend: lint-js lint-css
 lint-frontend-fix: lint-js-fix lint-css-fix
 
 .PHONY: lint-backend
-lint-backend: lint-go lint-go-vet lint-editorconfig
+lint-backend: lint-go lint-go-vet lint-go-gopls lint-editorconfig
 
 .PHONY: lint-backend-fix
 lint-backend-fix: lint-go-fix lint-go-vet lint-editorconfig
@@ -424,7 +426,12 @@ lint-go-vet:
 	@GOOS= GOARCH= $(GO) build code.gitea.io/gitea-vet
 	@$(GO) vet -vettool=gitea-vet ./...
 
-.PHONY: lint-editorconfig
+.PHONY: lint-go-gopls
+lint-go-gopls:
+	@echo "Running gopls check..."
+# TODO: Fix all errors and remove '|| true'
+	@GO=$(GO) GOPLS_PACKAGE=$(GOPLS_PACKAGE) tools/lint-go-gopls.sh $(GO_SOURCES_NO_BINDATA) || true
+
 lint-editorconfig:
 	@$(GO) run $(EDITORCONFIG_CHECKER_PACKAGE) $(EDITORCONFIG_FILES)
 
@@ -864,6 +871,7 @@ deps-tools:
 	$(GO) install $(GO_LICENSES_PACKAGE)
 	$(GO) install $(GOVULNCHECK_PACKAGE)
 	$(GO) install $(ACTIONLINT_PACKAGE)
+	$(GO) install $(GOPLS_PACKAGE)
 
 node_modules: package-lock.json
 	npm install --no-save

tools/lint-go-gopls.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -euo pipefail
+
+cd "$(dirname -- "${BASH_SOURCE[0]}")" && cd ..
+
+# lint all go files with 'gopls check' and look for lines starting with the
+# current absolute path, indicating a error was found. This is neccessary
+# because the tool does not set non-zero exit code when errors are found.
+# ref: https://github.com/golang/go/issues/67078
+ERROR_LINES=$("$GO" run "$GOPLS_PACKAGE" check $@ 2>/dev/null | grep -E "^$PWD");
+NUM_ERRORS=$(echo "$ERROR_LINES" | wc -l)
+
+if [ "$NUM_ERRORS" -eq "0" ]; then
+  exit 0;
+else
+  echo "$ERROR_LINES"
+  echo "Found $NUM_ERRORS 'gopls check' errors"
+  exit 1;
+fi