feat(prebuild): make prebuild available as an external package.

Usefull for downstream repo.

pkg/prebuild/prebuild_test.go

@@ -0,0 +1,87 @@
+// apparmor.d - Full set of apparmor profiles
+// Copyright (C) 2023 Alexandre Pujol <alexandre@pujol.io>
+// SPDX-License-Identifier: GPL-2.0-only
+
+package prebuild
+
+import (
+	"os"
+	"os/exec"
+	"testing"
+)
+
+func chdirGitRoot() {
+	cmd := exec.Command("git", "rev-parse", "--show-toplevel")
+	out, err := cmd.Output()
+	if err != nil {
+		panic(err)
+	}
+	root := string(out)[0 : len(out)-1]
+	if err := os.Chdir(root); err != nil {
+		panic(err)
+	}
+}
+
+func Test_PreBuild(t *testing.T) {
+	tests := []struct {
+		name     string
+		wantErr  bool
+		full     bool
+		complain bool
+		dist     string
+	}{
+		{
+			name:     "Build for Archlinux",
+			wantErr:  false,
+			full:     false,
+			complain: true,
+			dist:     "arch",
+		},
+		{
+			name:     "Build for Ubuntu",
+			wantErr:  false,
+			full:     true,
+			complain: false,
+			dist:     "ubuntu",
+		},
+		{
+			name:     "Build for Debian",
+			wantErr:  false,
+			full:     true,
+			complain: false,
+			dist:     "debian",
+		},
+		{
+			name:     "Build for OpenSUSE Tumbleweed",
+			wantErr:  false,
+			full:     true,
+			complain: true,
+			dist:     "opensuse",
+		},
+		// {
+		// 	name:     "Build for Fedora",
+		// 	wantErr:  true,
+		// 	full:     false,
+		// 	complain: false,
+		// 	dist:     "fedora",
+		// },
+	}
+	chdirGitRoot()
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			Distribution = tt.dist
+			if tt.full {
+				Prepares = append(Prepares, SetFullSystemPolicy)
+			}
+			if tt.complain {
+				Builds = append(Builds, BuildComplain)
+			}
+			if err := Prepare(); (err != nil) != tt.wantErr {
+				t.Errorf("Prepare() error = %v, wantErr %v", err, tt.wantErr)
+			}
+			if err := Build(); (err != nil) != tt.wantErr {
+				t.Errorf("Build() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}