ci: run the full unit suite on windows (#5370)

* ci: run the full unit suite on windows via make unit

Drops the curated `unit:windows` subset; the windows job now bootstraps like linux and runs `make unit`. Exceptions get added as failures show up.

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* ci: skip fixture refresh for windows unit tests

binny has no windows release, so the bootstrap action can't install the tools the fixture refresh needs.

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* test: skip linux container fixtures when docker can't run them

Windows CI runners only run windows containers, so image fixtures go through `testutils.SkipWithoutLinuxContainers`. No behavior change on linux/mac.

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix: close leaked file handles and posix squashfs paths on windows

- output writers are now closed on early returns in `scan`/`convert` (open handles block cleanup on windows)
- `newSBOMMultiWriter` used `path.Dir` on host paths, so output subdirectories were never created on windows
- squashfs walk paths were built with `filepath.Join`
- skip a few posix-only test cases (dir perms, xdg fallback, go-rpmdb ndb handle leak upstream)

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix(golang): resolve go source module dir natively on windows

- `parseGoModFile` passed the resolver's posix (`/c/...`) path to the go toolchain, so go source resolution silently found nothing on windows
- skip container-built fixtures (go archs, java builds) and golden image tarballs on windows; stereoscope's layer cache filenames contain `:`, which windows rejects

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix: keep posix paths posix on windows

- `ChrootContext.ToChrootPath` nested volumes (`D:\cwd\C:\root`) when the scan root was on another drive, so the prefix was never trimmed
- bitnami, python wheel/egg, and alpm parsers used `filepath` on posix location paths
- alpm backup-file lookups silently missed on windows

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* ci: pull the test fixture cache for windows unit tests

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix: don't map virtual file tree paths through the host on windows

`FiletreeResolver` without a chroot (snaps) ran request paths through `filepath.Abs`, rooting them on the current volume (`/payload.txt` -> `/d/payload.txt`), so snap scans on windows found nothing.

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix: match tar entry globs as posix on windows

- `matchesAnyGlob` used `doublestar.PathMatch` (host separator) on tar entry names, so tar-wrapped java archives silently produced nothing on windows
- test helpers now treat binary snippet keys and `FromFile` locations as posix

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* incorporate windows path fix

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* incorporate go-rpmdb close fix

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* close squashfs fixture writers before finalizing

- windows dir listings can report a zero size for files still open, so the manifest was packed empty

(also adds a temporary windows diagnostic for the binary cataloger)

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* temp: surface windows binary cataloger diagnostics

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix: keep directory symlink targets posix on windows

- the directory indexer joined symlink targets with native separators, so links in the posix file tree pointed nowhere and globs on link names found nothing
- binary fixture logical keys used native separators, so nested snippets were picked as the fixture dir on windows

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* keep addSymlinkToIndex under the funlen limit

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* drop windows skips covered by the stereoscope and go-rpmdb bumps

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

internal/cache/filesystem_test.go

@@ -6,6 +6,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 	"time"
@@ -95,6 +96,9 @@ func Test_makeDiskKey(t *testing.T) {
 }
 
 func Test_errors(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("windows ignores unix permission bits on directories")
+	}
 	tmp := t.TempDir()
 	cache := filepath.Join(tmp, "cache")
 	// make a non-writable directory

internal/capabilities/generate/discover_catalogers.go

@@ -212,7 +212,7 @@ func parseGenericCatalogerFunction(funcDecl *ast.FuncDecl, filePath, repoRoot st
 // extractPackageNameFromPath extracts the package name from a cataloger source file path
 // e.g., "syft/pkg/cataloger/swift/cataloger.go" -> "swift"
 func extractPackageNameFromPath(filePath string) string {
-	parts := strings.Split(filePath, string(filepath.Separator))
+	parts := strings.Split(filepath.ToSlash(filePath), "/")
 
 	// find the LAST occurrence of "cataloger" in the path
 	// (to handle test fixtures with multiple "cataloger" segments)

internal/capabilities/generate/discover_catalogers_test.go

@@ -4,6 +4,7 @@ import (
 	"go/ast"
 	"go/parser"
 	"go/token"
+	"path/filepath"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -337,7 +338,7 @@ func TestResolveImportPath(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			got := resolveImportPath(tt.importPath, testRepoRoot)
-			require.Equal(t, tt.want, got)
+			require.Equal(t, filepath.FromSlash(tt.want), got)
 		})
 	}
 }

internal/file/squashfs.go

@@ -4,7 +4,7 @@ import (
 	"errors"
 	"io/fs"
 	"os"
-	"path/filepath"
+	"path"
 	"strings"
 
 	"github.com/diskfs/go-diskfs/filesystem"
@@ -25,7 +25,8 @@ func WalkDiskDir(fsys filesystem.FileSystem, root string, fn WalkDiskDirFunc) er
 	}
 
 	for _, info := range infos {
-		p := filepath.Join(root, info.Name())
+		// squashfs paths are posix regardless of host os
+		p := path.Join(root, info.Name())
 		err = walkDiskDir(fsys, p, info, fn)
 		if err != nil {
 			if errors.Is(err, fs.SkipDir) {
@@ -74,7 +75,7 @@ func walkDiskDir(fsys filesystem.FileSystem, name string, d os.FileInfo, walkDir
 	}
 
 	for _, d1 := range dirs {
-		name1 := filepath.Join(name, d1.Name())
+		name1 := path.Join(name, d1.Name())
 		if err := walkDiskDir(fsys, name1, d1, walkDirFn); err != nil {
 			if errors.Is(err, fs.SkipDir) {
 				break

internal/file/squashfs_test.go

@@ -19,6 +19,8 @@ func createTestFS(t *testing.T) filesystem.FileSystem {
 	filename := "test.squashfs"
 	f, err := os.Create(filepath.Join(dir, filename))
 	require.NoError(t, err)
+	// windows can't remove the temp dir while the backing file is open
+	t.Cleanup(func() { _ = f.Close() })
 
 	b := file.New(f, false)
 	fsys, err := squashfs.Create(b, 0, 0, 4096)

internal/file/tar_file_traversal.go

@@ -84,7 +84,8 @@ func ExtractGlobsFromTarToUniqueTempFile(ctx context.Context, archivePath, dir s
 
 func matchesAnyGlob(name string, globs ...string) bool {
 	for _, glob := range globs {
-		if matches, err := doublestar.PathMatch(glob, name); err == nil && matches {
+		// tar entry names are always posix, so don't match with the host separator (PathMatch)
+		if matches, err := doublestar.Match(glob, name); err == nil && matches {
 			return true
 		}
 	}

internal/os/feature_detection_test.go

@@ -16,6 +16,7 @@ import (
 	"github.com/anchore/syft/internal/os"
 	"github.com/anchore/syft/internal/sbomsync"
 	"github.com/anchore/syft/internal/task"
+	"github.com/anchore/syft/internal/testutils"
 	"github.com/anchore/syft/syft"
 	"github.com/anchore/syft/syft/file"
 	"github.com/anchore/syft/syft/linux"
@@ -84,6 +85,7 @@ func Test_EnvironmentTask(t *testing.T) {
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
+			testutils.SkipWithoutLinuxContainers(t)
 			tarPath := imagetest.GetFixtureImageTarPath(t, test.name)
 
 			// get the source

internal/testutils/docker.go

@@ -0,0 +1,30 @@
+package testutils
+
+import (
+	"os/exec"
+	"runtime"
+	"strings"
+	"sync"
+	"testing"
+)
+
+var dockerServerOS = sync.OnceValue(func() string {
+	out, err := exec.Command("docker", "version", "--format", "{{.Server.Os}}").Output()
+	if err != nil {
+		return ""
+	}
+	return strings.TrimSpace(string(out))
+})
+
+// SkipWithoutLinuxContainers skips tests whose fixtures are linux container images (built or run via docker).
+// This only kicks in on windows, where the docker daemon is often running windows containers (or is absent),
+// so the linux fixture images can't be built. Everywhere else the fixture tooling is left to fail loudly.
+func SkipWithoutLinuxContainers(t testing.TB) {
+	t.Helper()
+	if runtime.GOOS != "windows" {
+		return
+	}
+	if os := dockerServerOS(); os != "linux" {
+		t.Skipf("linux container fixtures unavailable (docker server os=%q)", os)
+	}
+}

internal/tmpdir/tmpdir_test.go

@@ -265,8 +265,9 @@ func TestLazyCreation(t *testing.T) {
 	// root dir is not created until needed
 	assert.Equal(t, "", td.root)
 
-	_, _, err := td.NewFile("trigger-*")
+	f, _, err := td.NewFile("trigger-*")
 	require.NoError(t, err)
+	require.NoError(t, f.Close())
 
 	assert.NotEmpty(t, td.root)