|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "go/ast" |
| 6 | + "go/parser" |
| 7 | + "go/token" |
| 8 | + "log" |
| 9 | + "os" |
| 10 | + "strconv" |
| 11 | + |
| 12 | + hcversion "github.com/hashicorp/go-version" |
| 13 | + "github.com/urfave/cli/v2" |
| 14 | +) |
| 15 | + |
| 16 | +const flgMode = "mode" |
| 17 | + |
| 18 | +const ( |
| 19 | + modePatch = "patch" |
| 20 | + modeMinor = "minor" |
| 21 | + modeMajor = "major" |
| 22 | +) |
| 23 | + |
| 24 | +const versionSourceFile = "./cmd/lego/zz_gen_version.go" |
| 25 | + |
| 26 | +const ( |
| 27 | + commentRelease = "release" |
| 28 | + commentDetach = "detach" |
| 29 | +) |
| 30 | + |
| 31 | +func main() { |
| 32 | + app := cli.NewApp() |
| 33 | + app.Name = "lego-releaser" |
| 34 | + app.Usage = "Lego releaser" |
| 35 | + app.HelpName = "releaser" |
| 36 | + app.Commands = []*cli.Command{ |
| 37 | + { |
| 38 | + Name: "release", |
| 39 | + Usage: "Update file for a release", |
| 40 | + Action: release, |
| 41 | + Before: func(ctx *cli.Context) error { |
| 42 | + mode := ctx.String("mode") |
| 43 | + switch mode { |
| 44 | + case modePatch, modeMinor, modeMajor: |
| 45 | + return nil |
| 46 | + default: |
| 47 | + return fmt.Errorf("invalid mode: %s", mode) |
| 48 | + } |
| 49 | + }, |
| 50 | + Flags: []cli.Flag{ |
| 51 | + &cli.StringFlag{ |
| 52 | + Name: flgMode, |
| 53 | + Aliases: []string{"m"}, |
| 54 | + Value: modePatch, |
| 55 | + Usage: fmt.Sprintf("The release mode: %s|%s|%s", modePatch, modeMinor, modeMajor), |
| 56 | + }, |
| 57 | + }, |
| 58 | + }, |
| 59 | + { |
| 60 | + Name: "detach", |
| 61 | + Usage: "Update file post release", |
| 62 | + Action: detach, |
| 63 | + }, |
| 64 | + } |
| 65 | + |
| 66 | + err := app.Run(os.Args) |
| 67 | + if err != nil { |
| 68 | + log.Fatal(err) |
| 69 | + } |
| 70 | +} |
| 71 | + |
| 72 | +func release(ctx *cli.Context) error { |
| 73 | + mode := ctx.String(flgMode) |
| 74 | + |
| 75 | + currentVersion, err := readCurrentVersion(versionSourceFile) |
| 76 | + if err != nil { |
| 77 | + return fmt.Errorf("read current version: %w", err) |
| 78 | + } |
| 79 | + |
| 80 | + nextVersion, err := bumpVersion(mode, currentVersion) |
| 81 | + if err != nil { |
| 82 | + return fmt.Errorf("bump version: %w", err) |
| 83 | + } |
| 84 | + |
| 85 | + err = generate(nextVersion, commentRelease) |
| 86 | + if err != nil { |
| 87 | + return err |
| 88 | + } |
| 89 | + |
| 90 | + return nil |
| 91 | +} |
| 92 | + |
| 93 | +func detach(_ *cli.Context) error { |
| 94 | + currentVersion, err := readCurrentVersion(versionSourceFile) |
| 95 | + if err != nil { |
| 96 | + return fmt.Errorf("read current version: %w", err) |
| 97 | + } |
| 98 | + |
| 99 | + v := currentVersion.Core().String() |
| 100 | + |
| 101 | + err = generate(v, commentDetach) |
| 102 | + if err != nil { |
| 103 | + return err |
| 104 | + } |
| 105 | + |
| 106 | + return nil |
| 107 | +} |
| 108 | + |
| 109 | +func readCurrentVersion(filename string) (*hcversion.Version, error) { |
| 110 | + fset := token.NewFileSet() |
| 111 | + file, err := parser.ParseFile(fset, filename, nil, parser.AllErrors) |
| 112 | + if err != nil { |
| 113 | + return nil, err |
| 114 | + } |
| 115 | + |
| 116 | + v := visitor{data: make(map[string]string)} |
| 117 | + ast.Walk(v, file) |
| 118 | + |
| 119 | + current, err := hcversion.NewSemver(v.data["defaultVersion"]) |
| 120 | + if err != nil { |
| 121 | + return nil, err |
| 122 | + } |
| 123 | + |
| 124 | + return current, nil |
| 125 | +} |
| 126 | + |
| 127 | +type visitor struct { |
| 128 | + data map[string]string |
| 129 | +} |
| 130 | + |
| 131 | +func (v visitor) Visit(n ast.Node) ast.Visitor { |
| 132 | + if n == nil { |
| 133 | + return nil |
| 134 | + } |
| 135 | + |
| 136 | + switch d := n.(type) { |
| 137 | + case *ast.GenDecl: |
| 138 | + if d.Tok == token.CONST { |
| 139 | + for _, spec := range d.Specs { |
| 140 | + valueSpec, ok := spec.(*ast.ValueSpec) |
| 141 | + if !ok { |
| 142 | + continue |
| 143 | + } |
| 144 | + if len(valueSpec.Names) != 1 || len(valueSpec.Values) != 1 { |
| 145 | + continue |
| 146 | + } |
| 147 | + |
| 148 | + va, ok := valueSpec.Values[0].(*ast.BasicLit) |
| 149 | + if !ok { |
| 150 | + continue |
| 151 | + } |
| 152 | + if va.Kind != token.STRING { |
| 153 | + continue |
| 154 | + } |
| 155 | + |
| 156 | + s, err := strconv.Unquote(va.Value) |
| 157 | + if err != nil { |
| 158 | + continue |
| 159 | + } |
| 160 | + |
| 161 | + v.data[valueSpec.Names[0].String()] = s |
| 162 | + } |
| 163 | + } |
| 164 | + default: |
| 165 | + // noop |
| 166 | + } |
| 167 | + return v |
| 168 | +} |
| 169 | + |
| 170 | +func bumpVersion(mode string, v *hcversion.Version) (string, error) { |
| 171 | + segments := v.Segments() |
| 172 | + |
| 173 | + switch mode { |
| 174 | + case modePatch: |
| 175 | + return fmt.Sprintf("%d.%d.%d", segments[0], segments[1], segments[2]+1), nil |
| 176 | + case modeMinor: |
| 177 | + return fmt.Sprintf("%d.%d.0", segments[0], segments[1]+1), nil |
| 178 | + case modeMajor: |
| 179 | + return fmt.Sprintf("%d.0.0", segments[0]+1), nil |
| 180 | + default: |
| 181 | + return "", fmt.Errorf("invalid mode: %s", mode) |
| 182 | + } |
| 183 | +} |
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