Add GroupIsInstalled to Grouper interface with pacman and dnf implementations

Co-authored-by: taigrr <8261498+taigrr@users.noreply.github.com>

dnf/capabilities.go

@@ -136,6 +136,11 @@ func (d *DNF) GroupInstall(ctx context.Context, group string, opts ...snack.Opti
 	return groupInstall(ctx, group, opts...)
 }
 
+// GroupIsInstalled reports whether all packages in the group are installed.
+func (d *DNF) GroupIsInstalled(ctx context.Context, group string) (bool, error) {
+	return groupIsInstalled(ctx, group, d.v5)
+}
+
 // NormalizeName returns the canonical form of a package name.
 func (d *DNF) NormalizeName(name string) string {
 	return normalizeName(name)

dnf/capabilities_linux.go

@@ -264,3 +264,14 @@ func groupInstall(ctx context.Context, group string, opts ...snack.Option) error
 	_, err := run(ctx, []string{"group", "install", "-y", group}, o)
 	return err
 }
+
+func groupIsInstalled(ctx context.Context, group string, v5 bool) (bool, error) {
+	out, err := run(ctx, []string{"group", "list"}, snack.Options{})
+	if err != nil {
+		return false, fmt.Errorf("dnf groupIsInstalled: %w", err)
+	}
+	if v5 {
+		return parseGroupIsInstalledDNF5(out, group), nil
+	}
+	return parseGroupIsInstalled(out, group), nil
+}

dnf/capabilities_other.go

@@ -87,3 +87,7 @@ func groupInfo(_ context.Context, _ string, _ bool) ([]snack.Package, error) {
 func groupInstall(_ context.Context, _ string, _ ...snack.Option) error {
 	return snack.ErrUnsupportedPlatform
 }
+
+func groupIsInstalled(_ context.Context, _ string, _ bool) (bool, error) {
+	return false, snack.ErrUnsupportedPlatform
+}

dnf/parse.go

@@ -265,6 +265,26 @@ func parseGroupList(output string) []string {
 	return groups
 }
 
+// parseGroupIsInstalled checks whether a named group appears under "Installed Groups:"
+// in `dnf group list` output.
+func parseGroupIsInstalled(output, group string) bool {
+	inInstalled := false
+	for _, line := range strings.Split(output, "\n") {
+		trimmed := strings.TrimSpace(line)
+		if strings.HasSuffix(trimmed, "Groups:") || strings.HasSuffix(trimmed, "groups:") {
+			inInstalled = strings.HasPrefix(strings.ToLower(trimmed), "installed")
+			continue
+		}
+		if !inInstalled || trimmed == "" {
+			continue
+		}
+		if strings.EqualFold(trimmed, group) {
+			return true
+		}
+	}
+	return false
+}
+
 // parseGroupInfo parses `dnf group info <group>` output.
 // Packages are listed under section headers like "Mandatory Packages:", "Default Packages:", "Optional Packages:".
 func parseGroupInfo(output string) []snack.Package {

dnf/parse_dnf5.go

@@ -188,6 +188,39 @@ func parseGroupListDNF5(output string) []string {
 	return groups
 }
 
+// parseGroupIsInstalledDNF5 checks whether a named group is installed from
+// `dnf5 group list` tabular output. A group is installed when its status field is "yes".
+func parseGroupIsInstalledDNF5(output, group string) bool {
+	output = stripPreamble(output)
+	inBody := false
+	for _, line := range strings.Split(output, "\n") {
+		trimmed := strings.TrimSpace(line)
+		if trimmed == "" {
+			continue
+		}
+		if !inBody {
+			if strings.HasPrefix(trimmed, "ID") && strings.Contains(trimmed, "Name") {
+				inBody = true
+				continue
+			}
+			continue
+		}
+		parts := strings.Fields(trimmed)
+		if len(parts) < 3 {
+			continue
+		}
+		status := parts[len(parts)-1]
+		if status != "yes" && status != "no" {
+			continue
+		}
+		name := strings.Join(parts[1:len(parts)-1], " ")
+		if strings.EqualFold(name, group) {
+			return status == "yes"
+		}
+	}
+	return false
+}
+
 // parseVersionLockDNF5 parses `dnf5 versionlock list` output.
 // Format:
 //

dnf/parse_test.go

@@ -186,6 +186,43 @@ func TestParseGroupInfo(t *testing.T) {
 	}
 }
 
+func TestParseGroupIsInstalled(t *testing.T) {
+	input := `Available Groups:
+   Container Management
+   Development Tools
+   Headless Management
+Installed Groups:
+   Minimal Install
+   Server
+`
+	tests := []struct {
+		group string
+		want  bool
+	}{
+		{"Minimal Install", true},
+		{"Server", true},
+		{"Development Tools", false},
+		{"Container Management", false},
+		{"Nonexistent Group", false},
+	}
+	for _, tt := range tests {
+		got := parseGroupIsInstalled(input, tt.group)
+		if got != tt.want {
+			t.Errorf("parseGroupIsInstalled(%q) = %v, want %v", tt.group, got, tt.want)
+		}
+	}
+
+	// Verify that empty lines within the Installed section don't stop parsing.
+	inputWithBlankLines := `Installed Groups:
+   First Group
+
+   Second Group
+`
+	if !parseGroupIsInstalled(inputWithBlankLines, "Second Group") {
+		t.Error("parseGroupIsInstalled: should find group after blank line in installed section")
+	}
+}
+
 func TestNormalizeName(t *testing.T) {
 	tests := []struct {
 		input, want string
@@ -338,6 +375,27 @@ kde-desktop                 KDE                                                n
 	}
 }
 
+func TestParseGroupIsInstalledDNF5(t *testing.T) {
+	input := `ID                          Name                                        Installed
+neuron-modelling-simulators Neuron Modelling Simulators                        no
+kde-desktop                 KDE                                                yes
+`
+	tests := []struct {
+		group string
+		want  bool
+	}{
+		{"KDE", true},
+		{"Neuron Modelling Simulators", false},
+		{"Nonexistent Group", false},
+	}
+	for _, tt := range tests {
+		got := parseGroupIsInstalledDNF5(input, tt.group)
+		if got != tt.want {
+			t.Errorf("parseGroupIsInstalledDNF5(%q) = %v, want %v", tt.group, got, tt.want)
+		}
+	}
+}
+
 func TestParseGroupInfoDNF5(t *testing.T) {
 	input := `Id                   : kde-desktop
 Name                 : KDE

pacman/capabilities.go

@@ -78,3 +78,8 @@ func (p *Pacman) GroupInstall(ctx context.Context, group string, opts ...snack.O
 	defer p.Unlock()
 	return groupInstall(ctx, group, opts...)
 }
+
+// GroupIsInstalled reports whether all packages in the group are installed.
+func (p *Pacman) GroupIsInstalled(ctx context.Context, group string) (bool, error) {
+	return groupIsInstalled(ctx, group)
+}

pacman/capabilities_linux.go

@@ -219,3 +219,50 @@ func groupInstall(ctx context.Context, group string, opts ...snack.Option) error
 	_, err := run(ctx, []string{"-S", "--noconfirm", group}, o)
 	return err
 }
+
+// parseGroupPkgSet parses "group pkg" lines and returns the set of package names.
+func parseGroupPkgSet(output string) map[string]struct{} {
+	set := make(map[string]struct{})
+	for _, line := range strings.Split(output, "\n") {
+		line = strings.TrimSpace(line)
+		if line == "" {
+			continue
+		}
+		parts := strings.Fields(line)
+		if len(parts) >= 2 {
+			set[parts[1]] = struct{}{}
+		}
+	}
+	return set
+}
+
+func groupIsInstalled(ctx context.Context, group string) (bool, error) {
+	// Get all packages in the group from the sync database.
+	availOut, err := run(ctx, []string{"-Sg", group}, snack.Options{})
+	if err != nil {
+		if strings.Contains(err.Error(), "exit status 1") {
+			return false, fmt.Errorf("pacman groupIsInstalled %s: %w", group, snack.ErrNotFound)
+		}
+		return false, fmt.Errorf("pacman groupIsInstalled: %w", err)
+	}
+	avail := parseGroupPkgSet(availOut)
+	if len(avail) == 0 {
+		return false, fmt.Errorf("pacman groupIsInstalled %s: %w", group, snack.ErrNotFound)
+	}
+	// Get packages from the group that are installed (local database).
+	instOut, err := run(ctx, []string{"-Qg", group}, snack.Options{})
+	if err != nil {
+		// exit status 1 means nothing from this group is installed.
+		if strings.Contains(err.Error(), "exit status 1") {
+			return false, nil
+		}
+		return false, fmt.Errorf("pacman groupIsInstalled: %w", err)
+	}
+	inst := parseGroupPkgSet(instOut)
+	for pkg := range avail {
+		if _, ok := inst[pkg]; !ok {
+			return false, nil
+		}
+	}
+	return true, nil
+}

pacman/capabilities_other.go

@@ -51,3 +51,7 @@ func groupInfo(_ context.Context, _ string) ([]snack.Package, error) {
 func groupInstall(_ context.Context, _ string, _ ...snack.Option) error {
 	return snack.ErrUnsupportedPlatform
 }
+
+func groupIsInstalled(_ context.Context, _ string) (bool, error) {
+	return false, snack.ErrUnsupportedPlatform
+}

snack.go

@@ -186,6 +186,9 @@ type Grouper interface {
 
 	// GroupInstall installs all packages in a group.
 	GroupInstall(ctx context.Context, group string, opts ...Option) error
+
+	// GroupIsInstalled reports whether all packages in the group are installed.
+	GroupIsInstalled(ctx context.Context, group string) (bool, error)
 }
 
 // NormalizeName provides package name normalization.