package xcaddy import ( "encoding/json" "os/exec" ) // Compile contains parameters for compilation. type Compile struct { Platform Cgo bool `json:"cgo,omitempty"` } // CgoEnabled returns "1" if c.Cgo is true, "0" otherwise. // This is used for setting the CGO_ENABLED env variable. func (c Compile) CgoEnabled() string { if c.Cgo { return "1" } return "0" } // Platform represents a build target. type Platform struct { OS string `json:"os,omitempty"` Arch string `json:"arch,omitempty"` ARM string `json:"arm,omitempty"` } // SupportedPlatforms runs `go tool dist list` to make // a list of possible build targets. func SupportedPlatforms() ([]Compile, error) { out, err := exec.Command("go", "tool", "dist", "list", "-json").Output() if err != nil { return nil, err } var dists []dist err = json.Unmarshal(out, &dists) if err != nil { return nil, err } // translate from the go command's output structure // to our own user-facing structure var compiles []Compile for _, d := range dists { comp := d.toCompile() if d.GOARCH == "arm" { if d.GOOS == "linux" { // only linux supports ARMv5; see https://github.com/golang/go/issues/18418 comp.ARM = "5" compiles = append(compiles, comp) } comp.ARM = "6" compiles = append(compiles, comp) comp.ARM = "7" compiles = append(compiles, comp) } else { compiles = append(compiles, comp) } } return compiles, nil } // dist is the structure that fits the output // of the `go tool dist list -json` command. type dist struct { GOOS string `json:"GOOS"` GOARCH string `json:"GOARCH"` CgoSupported bool `json:"CgoSupported"` } func (d dist) toCompile() Compile { return Compile{ Platform: Platform{ OS: d.GOOS, Arch: d.GOARCH, }, Cgo: d.CgoSupported, } }