Add Makefile, golangci-lint config and CI

Introduce a Makefile with a check target that runs the unit tests with
the race detector, plus golangci and golangci-fix targets that install
a pinned golangci-lint (v2.12.2) and lint the module. The linter is
installed from the version-tagged install script rather than master,
whose checksum handling currently mismatches release SBOM artifacts.

Add a .golangci.yml enabling the linters we care about (gosec, govet,
misspell, revive, staticcheck, unused) with gofmt/goimports, and a
GitHub Actions workflow that runs make check and make golangci using
the Go version from go.mod. Remove the obsolete Travis configuration
and ignore the locally installed golangci-lint binary.

Signed-off-by: Antonin Bas <antonin.bas@broadcom.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: antoninbas

.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Run unit tests
+        run: make check
+
+  golangci-lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Run golangci-lint
+        run: make golangci

.gitignore

@@ -21,3 +21,6 @@ _testmain.go
 
 *.exe
 *.test
+
+# golangci-lint binary installed by the Makefile
+/.golangci-bin/

.golangci.yml

@@ -0,0 +1,46 @@
+# golangci-lint configuration used for CI.
+version: "2"
+run:
+  tests: true
+  timeout: 15m
+linters:
+  default: none
+  enable:
+    - gosec
+    - govet
+    - misspell
+    - revive
+    - staticcheck
+    - unused
+  settings:
+    gosec:
+      excludes:
+        # G115 reports a lot of integer-conversion false positives and is not
+        # accurate enough yet (see https://github.com/securego/gosec/issues/1187).
+        - G115 # Potential integer overflow when converting between integer types
+    revive:
+      confidence: 0.8
+      severity: warning
+      rules:
+        - name: unreachable-code
+        - name: errorf
+        - name: range
+        - name: superfluous-else
+        - name: var-declaration
+        - name: duplicated-imports
+  exclusions:
+    presets:
+      - legacy
+      - common-false-positives
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  settings:
+    goimports:
+      local-prefixes:
+        - gopkg.in/natefinch/lumberjack.v2
+
+issues:
+  max-issues-per-linter: 0
+  max-same-issues: 0

.travis.yml

@@ -0,0 +1,38 @@
+SHELL := /bin/bash
+
+GO ?= go
+
+# Arguments to pass to the "go test" invocation.
+# Example: make check TEST_ARGS="-run ^TestMaxAge$"
+TEST_ARGS ?=
+
+GOLANGCI_LINT_VERSION := v2.12.2
+GOLANGCI_LINT_BINDIR := $(CURDIR)/.golangci-bin
+GOLANGCI_LINT_BIN := $(GOLANGCI_LINT_BINDIR)/$(GOLANGCI_LINT_VERSION)/golangci-lint
+
+.PHONY: all
+all: check
+
+.PHONY: check
+check:
+	@echo "===> Running unit tests <==="
+	@CGO_ENABLED=1 $(GO) test $(TEST_ARGS) -race ./...
+
+$(GOLANGCI_LINT_BIN):
+	@echo "===> Installing golangci-lint <==="
+	@rm -rf $(GOLANGCI_LINT_BINDIR)/* # remove old versions
+	@curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/$(GOLANGCI_LINT_VERSION)/install.sh | sh -s -- -b $(GOLANGCI_LINT_BINDIR)/$(GOLANGCI_LINT_VERSION) $(GOLANGCI_LINT_VERSION)
+
+.PHONY: golangci
+golangci: $(GOLANGCI_LINT_BIN)
+	@echo "===> Running golangci-lint <==="
+	@$(GOLANGCI_LINT_BIN) run ./...
+
+.PHONY: golangci-fix
+golangci-fix: $(GOLANGCI_LINT_BIN)
+	@echo "===> Running golangci-lint --fix <==="
+	@$(GOLANGCI_LINT_BIN) run --fix ./...
+
+.PHONY: clean
+clean:
+	@rm -rf $(GOLANGCI_LINT_BINDIR)