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Merge pull request #165 from motemen/support-gomod
Support Go modules
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,12 +1,12 @@ | ||
| module github.com/motemen/gore | ||
|
|
||
| go 1.12 | ||
| go 1.13 | ||
|
|
||
| require ( | ||
| github.com/mattn/go-runewidth v0.0.7 // indirect | ||
| github.com/motemen/go-quickfix v0.0.0-20160413151302-5c522febc679 | ||
| github.com/motemen/go-quickfix v0.0.0-20200103095207-27e35cdee537 | ||
| github.com/peterh/liner v1.1.0 | ||
| github.com/stretchr/testify v1.3.0 | ||
| golang.org/x/text v0.3.2 | ||
| golang.org/x/tools v0.0.0-20191212051200-825cb0626375 | ||
| golang.org/x/tools v0.0.0-20191230220329-2aa90c603ae3 | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| package gore | ||
|
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| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "go/build" | ||
| "io" | ||
| "io/ioutil" | ||
| "net" | ||
| "net/url" | ||
| "os" | ||
| "os/exec" | ||
| "path/filepath" | ||
| "strconv" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| func (s *Session) initGoMod() error { | ||
| tempModule := filepath.Base(s.tempDir) | ||
| goModPath := filepath.Join(s.tempDir, "go.mod") | ||
| directives := listModuleDirectives() | ||
| mod := "module " + tempModule + "\n" + strings.Join(directives, "\n") | ||
| return ioutil.WriteFile(goModPath, []byte(mod), 0644) | ||
| } | ||
|
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| func listModuleDirectives() []string { | ||
| var directives []string | ||
| for i, pp := range printerPkgs { | ||
| if pp.path == "fmt" { | ||
| continue | ||
| } | ||
| // Check local module caches. | ||
| found := lookupGoModule(pp.path, pp.version) | ||
| if found { | ||
| for _, r := range pp.requires { | ||
| if !lookupGoModule(r.path, r.version) { | ||
| found = false | ||
| break | ||
| } | ||
| } | ||
| } | ||
| if found || canAccessGoproxy() { | ||
| // Specifying the version of the printer package improves startup | ||
| // performance by skipping module version fetching. Also allows to | ||
| // use gore in offline environment. | ||
| directives = append(directives, "require "+pp.path+" "+pp.version) | ||
| for _, r := range pp.requires { | ||
| directives = append(directives, "require "+r.path+" "+r.version) | ||
| } | ||
| } else { | ||
| // If there is no module cache and no network connection, use fmt package. | ||
| printerPkgs = printerPkgs[i+1:] | ||
| } | ||
| // only the first printer is checked (assuming printerPkgs[1] is fmt) | ||
| break | ||
| } | ||
| modules, err := goListAll() | ||
| if err != nil { | ||
| return directives | ||
| } | ||
| for _, m := range modules { | ||
| if m.Main || m.Replace != nil { | ||
| directives = append(directives, "replace "+m.Path+" => "+strconv.Quote(m.Dir)) | ||
| } | ||
| } | ||
| return directives | ||
| } | ||
|
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| type goModule struct { | ||
| Path, Dir, Version string | ||
| Main bool | ||
| Replace *goModule | ||
| } | ||
|
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| func goListAll() ([]*goModule, error) { | ||
| cmd := exec.Command("go", "list", "-json", "-m", "all") | ||
| out, err := cmd.Output() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| d := json.NewDecoder(bytes.NewReader(out)) | ||
| var ms []*goModule | ||
| for { | ||
| m := new(goModule) | ||
| if err := d.Decode(m); err != nil { | ||
| if err == io.EOF { | ||
| return ms, nil | ||
| } | ||
| return nil, err | ||
| } | ||
| ms = append(ms, m) | ||
| } | ||
| } | ||
|
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||
| func lookupGoModule(pkg, version string) bool { | ||
| modDir := filepath.Join(build.Default.GOPATH, "pkg/mod", pkg+"@"+version) | ||
| fi, err := os.Stat(modDir) | ||
| return err == nil && fi.IsDir() | ||
| } | ||
|
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||
| func canAccessGoproxy() bool { | ||
| var host string | ||
| if url, err := url.Parse(getGoproxy()); err != nil { | ||
| host = "proxy.golang.org" | ||
| } else { | ||
| host = url.Hostname() | ||
| } | ||
| addr := net.JoinHostPort(host, "80") | ||
| dialer := net.Dialer{Timeout: 5 * time.Second} | ||
| conn, err := dialer.Dial("tcp", addr) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| defer conn.Close() | ||
| return true | ||
| } | ||
|
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| func getGoproxy() string { | ||
| if goproxy := os.Getenv("GOPROXY"); goproxy != "" { | ||
| return goproxy | ||
| } | ||
| return "https://proxy.golang.org/" | ||
| } |
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