ci: expands GitHub actions to include multiplatform CI closes #26

.github/workflows/ci.yml

@@ -23,26 +23,30 @@ jobs:
         run: make
 
   test-fedora:
-    name: Build and test on Fedora latest
-    runs-on: ubuntu-latest
+    name: Build and test Fedora on multiple runners
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, ubuntu-24.04-arm] 
     container:
       image: quay.io/fedora/fedora:latest
       options: --user root
     steps:
+      - name: Check out repository
+        uses: actions/checkout@v6
       - name: Install dependencies
         run: |
           dnf update -y
           dnf install -y golang make tar diffutils bzip2 gzip curl git which
       - name: Mark repo as safe for git
         run: git config --global --add safe.directory $GITHUB_WORKSPACE
-      - name: Check out repository
-        uses: actions/checkout@v6
       - name: Build and test
         run: make
+
   version-release:
     runs-on: ubuntu-latest
-    needs: [test-makefile, test-fedora]
-    if: github.event_name == 'push' && github.ref == 'main'
+    needs: [test-makefile, test-fedora, test-macos, test-windows]
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
       - name: Github app installation token
         uses: actions/create-github-app-token@v2
@@ -60,3 +64,40 @@ jobs:
         uses: cycjimmy/semantic-release-action@v6
         env:
           GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
+
+  test-macos:
+    name: Build and test on macOS
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ macos-latest, macos-26-intel ] 
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v6
+      - name: Install dependencies
+        run: |
+          brew update
+          brew install golang make diffutils git grep gnu-tar
+      - name: Build and test
+        run: make
+
+
+  test-windows:
+    name: Build and test on Windows
+    runs-on: ${{ matrix.os }}
+    env:
+      CGO_ENABLED: 0
+    strategy:
+      matrix:
+        os: [ windows-latest, windows-11-arm ]
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v6
+      - uses: actions/setup-go@v6
+        with:
+          go-version: "1.25"
+      - name: Install dependencies
+        run: |
+          choco install -y make diffutils gzip bzip2 git
+      - name: Build and test
+        run: bash -c "make"

Makefile

@@ -1,6 +1,8 @@
 PROJECT := tar-diff
-VERSION := $(shell grep -oP 'VERSION\s*=\s*"\K[^"]+' pkg/common/version.go)
+VERSION := $(shell awk -F'"' '/var VERSION =/ {print $$2}' pkg/common/version.go)
 PROJ_TARBALL := $(PROJECT)_$(VERSION).tar.gz
+GOCOVERDIR := $(CURDIR)/test/coverage
+
 
 .PHONY: all build clean fmt install lint test tools dist unit-test integration-test validate .install.golangci-lint
 
@@ -32,7 +34,9 @@ $(PROJ_TARBALL):
 	git archive --prefix=tar-diff_$(VERSION)/ --format=tar.gz HEAD --output $(PROJ_TARBALL) 
 
 build:
-	go build $(GOFLAGS) ./...
+	mkdir -p $(GOCOVERDIR)
+	go build $(GOFLAGS) -cover -o tar-diff ./cmd/tar-diff
+	go build $(GOFLAGS) -cover -o tar-patch ./cmd/tar-patch
 
 tar-diff:
 	go build $(GOFLAGS) ./cmd/tar-diff
@@ -55,12 +59,17 @@ tools: .install.golangci-lint
 clean:
 	rm -f tar-diff tar-patch
 	rm -rf $(PROJECT)_$(VERSION) $(PROJ_TARBALL)
+	rm -rf $(GOCOVERDIR)
+
+integration-test: build
+	GOCOVERDIR=$(GOCOVERDIR) tests/test.sh
+	go tool covdata percent -i=$(GOCOVERDIR)
 
-integration-test: tar-diff tar-patch
-	tests/test.sh
 
 unit-test:
-	go test $(GOFLAGS) -cover ./...
+	mkdir -p $(GOCOVERDIR)
+	go test $(GOFLAGS) -coverprofile=$(GOCOVERDIR)/unit.out ./...
+	go tool cover -func=$(GOCOVERDIR)/unit.out
 
 test: unit-test integration-test
 
@@ -69,7 +78,7 @@ fmt:
 
 validate: lint
 	@go vet $(GOFLAGS) ./...
-	@test -z "$$(gofmt -s -l . | tee /dev/stderr)"
+	@if [ -n "$$WINDIR" ]; then echo "Skipping gofmt check on Windows"; else output=$$(gofmt -s -l .); test -z "$$output" || (echo "$$output"; exit 1); fi
 
 lint:
 	GOFLAGS=$(GOFLAGS) $(GOBIN)/golangci-lint run

tests/test.sh

@@ -2,6 +2,33 @@
 
 set -e
 
+command -v gtar &>/dev/null && { shopt -s expand_aliases; alias tar=gtar; }
+
+
+ln_soft(){
+    local target="$1"
+    local link="$2"
+
+# Detect Windows
+    if [[ -n "$WINDIR" ]] || [[ "$OSTYPE" == "msys" ]] || [[ "$OSTYPE" == "msys2" ]]; then
+        touch "${target}"
+        powershell -Command "New-Item -ItemType SymbolicLink -Path '${link}' -Target '${target}' -Force"
+    else
+        ln -s "${target}" "${link}"
+    fi
+}
+ln_hard(){
+    local source="$1"
+    local link="$2"
+
+#Window detection
+    if [[ -n "$WINDIR" ]] || [[ "$OSTYPE" == "msys" ]] || [[ "$OSTYPE" == "msys2" ]]; then
+        powershell -Command "New-Item -ItemType HardLink -Path '${link}' -Value '${source}' -Force"
+    else
+        ln "${source}" "${link}"
+    fi
+}
+
 TEST_DIR=$(mktemp -d /tmp/test-tardiff-XXXXXX)
 
 create_orig () {
@@ -16,9 +43,14 @@ create_orig () {
     echo foo > data/dir1/foo.txt
     echo bar > data/dir1/bar.txt
     echo movedata > data/dir1/move.txt
-    ln -s not-exist data/broken
-    ln -s foo.txt data/dir1/symlink
-    ln data/dir1/foo.txt data/dir1/hardlink
+
+    # Skip broken symlink on Windows: tar refuses to archive symlinks with non-existent targets
+    if [[ -z "$WINDIR" ]] && [[ "$OSTYPE" != "msys" ]] && [[ "$OSTYPE" != "msys2" ]]; then
+        ln_soft not-exist data/broken
+    fi
+    ln_soft foo.txt data/dir1/symlink
+    ln_hard data/dir1/foo.txt data/dir1/hardlink
+
 
     echo "PART1" > data/sparse
     dd of=data/sparse if=/dev/null bs=1024k seek=1 count=1 &> /dev/null
@@ -33,7 +65,7 @@ modify_orig () {
 
     mkdir -p $DIR
     # Extract old data
-    tar xf  $SRC -C $DIR
+    tar xf $SRC -C $DIR
     pushd $DIR &> /dev/null
 
     # Modify it
@@ -42,15 +74,15 @@ modify_orig () {
 
     echo bar >> data/dir1/bar.txt
     mv data/dir1/bar.txt data/dir1/bar.TXT # Rename we should pick up
-    ln data/dir1/foo.txt data/dir1/hardlink2 
+    ln_hard data/dir1/foo.txt data/dir1/hardlink2
 
     popd &> /dev/null
 }
 
 compress_tar () {
     FILE=$1
-    gzip --keep $FILE
-    bzip2 --keep $FILE
+    gzip -k $FILE
+    bzip2 -k $FILE
 }
 
 create_tar () {