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Merge pull request #120 from Songmu/go-imports
support `meta name="go-import"` to detect Go repository
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/url" | ||
| "strings" | ||
|
|
||
| "golang.org/x/net/html" | ||
| ) | ||
|
|
||
| func detectGoImport(u *url.URL) (string, *url.URL, error) { | ||
| goGetU, _ := url.Parse(u.String()) // clone | ||
| q := goGetU.Query() | ||
| q.Add("go-get", "1") | ||
| goGetU.RawQuery = q.Encode() | ||
|
|
||
| cli := &http.Client{ | ||
| CheckRedirect: func(req *http.Request, via []*http.Request) error { | ||
| // never follow redirection | ||
| return http.ErrUseLastResponse | ||
| }, | ||
| } | ||
| req, _ := http.NewRequest(http.MethodGet, goGetU.String(), nil) | ||
| req.Header.Add("User-Agent", fmt.Sprintf("ghq/%s (+https://github.com/motemen/ghq)", Version)) | ||
| resp, err := cli.Do(req) | ||
| if err != nil { | ||
| return "", nil, err | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| return detectVCSAndRepoURL(resp.Body) | ||
| } | ||
|
|
||
| // find meta tag like following from thml | ||
| // <meta name="go-import" content="gopkg.in/yaml.v2 git https://gopkg.in/yaml.v2"> | ||
| // ref. https://golang.org/cmd/go/#hdr-Remote_import_paths | ||
| func detectVCSAndRepoURL(r io.Reader) (string, *url.URL, error) { | ||
| doc, err := html.Parse(r) | ||
| if err != nil { | ||
| return "", nil, err | ||
| } | ||
|
|
||
| var goImportContent string | ||
|
|
||
| var f func(*html.Node) | ||
| f = func(n *html.Node) { | ||
| if goImportContent != "" { | ||
| return | ||
| } | ||
| if n.Type == html.ElementNode && n.Data == "meta" { | ||
| var ( | ||
| goImportMeta = false | ||
| content = "" | ||
| ) | ||
| for _, a := range n.Attr { | ||
| if a.Key == "name" && a.Val == "go-import" { | ||
| goImportMeta = true | ||
| continue | ||
| } | ||
| if a.Key == "content" { | ||
| content = a.Val | ||
| } | ||
| } | ||
| if goImportMeta && content != "" { | ||
| goImportContent = content | ||
| } | ||
| } | ||
| for c := n.FirstChild; c != nil; c = c.NextSibling { | ||
| f(c) | ||
| } | ||
| } | ||
| f(doc) | ||
|
|
||
| stuffs := strings.Fields(goImportContent) | ||
| if len(stuffs) < 3 { | ||
| return "", nil, fmt.Errorf("no go-import meta tags detected") | ||
| } | ||
| u, err := url.Parse(stuffs[2]) | ||
| if err != nil { | ||
| return "", nil, err | ||
| } | ||
| return stuffs[1], u, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "strings" | ||
| "testing" | ||
| ) | ||
|
|
||
| func TestDetectVCSAndRepoURL(t *testing.T) { | ||
| input := `<html> | ||
| <head> | ||
| <meta name="go-import" content="gopkg.in/yaml.v2 git https://gopkg.in/yaml.v2"> | ||
| <meta name="go-source" content="gopkg.in/yaml.v2 _ https://github.com/go-yaml/yaml/tree/v2.2.2{/dir} https://github.com/go-yaml/yaml/blob/v2.2.2{/dir}/{file}#L{line}"> | ||
| </head> | ||
| <body> | ||
| go get gopkg.in/yaml.v2 | ||
| </body> | ||
| </html>` | ||
|
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||
| vcs, u, err := detectVCSAndRepoURL(strings.NewReader(input)) | ||
| if vcs != "git" { | ||
| t.Errorf("want: %q, got: %q", "git", vcs) | ||
| } | ||
| expectedURL := "https://gopkg.in/yaml.v2" | ||
| if u.String() != expectedURL { | ||
| t.Errorf("want: %q, got: %q", expectedURL, u.String()) | ||
| } | ||
| if err != nil { | ||
| t.Errorf("something went wrong: %s", err) | ||
| } | ||
| } |
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