|
| 1 | +package cmd |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "io" |
| 6 | + "log" |
| 7 | + "os" |
| 8 | + |
| 9 | + "github.com/compose-spec/compose-go/types" |
| 10 | + "github.com/imdario/mergo" |
| 11 | + "github.com/spf13/cobra" |
| 12 | + |
| 13 | + "github.com/score-spec/score-compose/internal/compose" |
| 14 | + |
| 15 | + loader "github.com/score-spec/score-go/loader" |
| 16 | + score "github.com/score-spec/score-go/types" |
| 17 | +) |
| 18 | + |
| 19 | +const ( |
| 20 | + scoreFileDefault = "./score.yaml" |
| 21 | + overridesFileDefault = "./overrides.score.yaml" |
| 22 | +) |
| 23 | + |
| 24 | +var ( |
| 25 | + scoreFile string |
| 26 | + overridesFile string |
| 27 | + outFile string |
| 28 | + envFile string |
| 29 | + buildCtx string |
| 30 | + |
| 31 | + verbose bool |
| 32 | +) |
| 33 | + |
| 34 | +func init() { |
| 35 | + runCmd.Flags().StringVarP(&scoreFile, "file", "f", scoreFileDefault, "Source SCORE file") |
| 36 | + runCmd.Flags().StringVar(&overridesFile, "overrides", overridesFileDefault, "Overrides SCORE file") |
| 37 | + runCmd.Flags().StringVarP(&outFile, "output", "o", "", "Output file") |
| 38 | + runCmd.Flags().StringVar(&envFile, "env-file", "", "Location to store sample .env file") |
| 39 | + runCmd.Flags().StringVar(&buildCtx, "build", "", "Replaces 'image' name with compose 'build' instruction") |
| 40 | + |
| 41 | + runCmd.Flags().BoolVar(&verbose, "verbose", false, "Enable diagnostic messages (written to STDERR)") |
| 42 | + |
| 43 | + rootCmd.AddCommand(runCmd) |
| 44 | +} |
| 45 | + |
| 46 | +var runCmd = &cobra.Command{ |
| 47 | + Use: "run", |
| 48 | + Short: "Translate the SCORE file to docker-compose configuration", |
| 49 | + RunE: run, |
| 50 | +} |
| 51 | + |
| 52 | +func run(cmd *cobra.Command, args []string) error { |
| 53 | + if !verbose { |
| 54 | + log.SetOutput(io.Discard) |
| 55 | + } |
| 56 | + |
| 57 | + // Open source file |
| 58 | + // |
| 59 | + log.Printf("Reading '%s'...\n", scoreFile) |
| 60 | + var err error |
| 61 | + var src []byte |
| 62 | + if src, err = os.ReadFile(scoreFile); err != nil { |
| 63 | + return err |
| 64 | + } |
| 65 | + |
| 66 | + // Parse SCORE spec |
| 67 | + // |
| 68 | + log.Print("Parsing SCORE spec...\n") |
| 69 | + var srcMap map[string]interface{} |
| 70 | + if err = loader.ParseYAML(src, &srcMap); err != nil { |
| 71 | + return err |
| 72 | + } |
| 73 | + |
| 74 | + // Apply overrides (optional) |
| 75 | + // |
| 76 | + if overridesFile != "" { |
| 77 | + var ovr []byte |
| 78 | + log.Printf("Checking '%s'...\n", overridesFile) |
| 79 | + if ovr, err = os.ReadFile(overridesFile); err == nil { |
| 80 | + log.Print("Applying SCORE overrides...\n") |
| 81 | + var ovrMap map[string]interface{} |
| 82 | + if err = loader.ParseYAML(ovr, &ovrMap); err != nil { |
| 83 | + return err |
| 84 | + } |
| 85 | + if err := mergo.MergeWithOverwrite(&srcMap, ovrMap); err != nil { |
| 86 | + return fmt.Errorf("applying overrides fom '%s': %w", overridesFile, err) |
| 87 | + } |
| 88 | + } else if !os.IsNotExist(err) || overridesFile != overridesFileDefault { |
| 89 | + return err |
| 90 | + } |
| 91 | + } |
| 92 | + |
| 93 | + // Validate SCORE spec |
| 94 | + // |
| 95 | + log.Print("Validating SCORE spec...\n") |
| 96 | + var spec score.WorkloadSpec |
| 97 | + if err = loader.MapSpec(srcMap, &spec); err != nil { |
| 98 | + return fmt.Errorf("validating workload spec: %w", err) |
| 99 | + } |
| 100 | + |
| 101 | + // Build docker-compose configuration |
| 102 | + // |
| 103 | + log.Print("Building docker-compose configuration...\n") |
| 104 | + proj, vars, err := compose.ConvertSpec(&spec) |
| 105 | + if err != nil { |
| 106 | + return fmt.Errorf("building docker-compose configuration: %w", err) |
| 107 | + } |
| 108 | + |
| 109 | + // Override 'image' reference with 'build' instructions |
| 110 | + // |
| 111 | + if buildCtx != "" { |
| 112 | + log.Printf("Applying build instructions: '%s'...\n", buildCtx) |
| 113 | + for idx := range proj.Services { |
| 114 | + if proj.Services[idx].Name == spec.Metadata.Name { |
| 115 | + proj.Services[idx].Build = &types.BuildConfig{Context: buildCtx} |
| 116 | + proj.Services[idx].Image = "" |
| 117 | + } |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + // Open output file (optional) |
| 122 | + // |
| 123 | + var dest = io.Writer(os.Stdout) |
| 124 | + if outFile != "" { |
| 125 | + log.Printf("Creating '%s'...\n", outFile) |
| 126 | + destFile, err := os.Create(outFile) |
| 127 | + if err != nil { |
| 128 | + return err |
| 129 | + } |
| 130 | + defer destFile.Close() |
| 131 | + |
| 132 | + dest = io.MultiWriter(dest, destFile) |
| 133 | + } |
| 134 | + |
| 135 | + // Write docker-compose spec |
| 136 | + // |
| 137 | + log.Print("Writing docker-compose configuration...\n") |
| 138 | + if err = compose.WriteYAML(proj, dest); err != nil { |
| 139 | + return err |
| 140 | + } |
| 141 | + |
| 142 | + if envFile != "" { |
| 143 | + // Open .env file |
| 144 | + // |
| 145 | + log.Printf("Creating '%s'...\n", envFile) |
| 146 | + dest, err := os.Create(envFile) |
| 147 | + if err != nil { |
| 148 | + return err |
| 149 | + } |
| 150 | + defer dest.Close() |
| 151 | + |
| 152 | + // Write .env file |
| 153 | + // |
| 154 | + log.Print("Writing .env file template...\n") |
| 155 | + for key, val := range vars { |
| 156 | + if val == nil { |
| 157 | + val = "" |
| 158 | + } |
| 159 | + var envVar = fmt.Sprintf("%s=%v\n", key, val) |
| 160 | + if _, err := dest.WriteString(envVar); err != nil { |
| 161 | + return err |
| 162 | + } |
| 163 | + } |
| 164 | + } |
| 165 | + |
| 166 | + return nil |
| 167 | +} |
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