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| author | Ondřej Surý <ondrej@sury.org> | 2012-03-26 16:50:58 +0200 |
|---|---|---|
| committer | Ondřej Surý <ondrej@sury.org> | 2012-03-26 16:50:58 +0200 |
| commit | 519725bb3c075ee2462c929f5997cb068e18466a (patch) | |
| tree | 5b162e8488ad147a645048c073577821b4a2bee9 /src/cmd/go/discovery.go | |
| parent | 842623c5dd2819d980ca9c58048d6bc6ed82475f (diff) | |
| download | golang-upstream-weekly/2012.03.22.tar.gz | |
Imported Upstream version 2012.03.22upstream-weekly/2012.03.22
Diffstat (limited to 'src/cmd/go/discovery.go')
| -rw-r--r-- | src/cmd/go/discovery.go | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/cmd/go/discovery.go b/src/cmd/go/discovery.go new file mode 100644 index 000000000..d9f930867 --- /dev/null +++ b/src/cmd/go/discovery.go @@ -0,0 +1,63 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !cmd_go_bootstrap + +// This code is compiled into the real 'go' binary, but it is not +// compiled into the binary that is built during all.bash, so as +// to avoid needing to build net (and thus use cgo) during the +// bootstrap process. + +package main + +import ( + "encoding/xml" + "io" + "strings" +) + +// parseMetaGoImports returns meta imports from the HTML in r. +// Parsing ends at the end of the <head> section or the beginning of the <body>. +func parseMetaGoImports(r io.Reader) (imports []metaImport) { + d := xml.NewDecoder(r) + d.Strict = false + for { + t, err := d.Token() + if err != nil { + return + } + if e, ok := t.(xml.StartElement); ok && strings.EqualFold(e.Name.Local, "body") { + return + } + if e, ok := t.(xml.EndElement); ok && strings.EqualFold(e.Name.Local, "head") { + return + } + e, ok := t.(xml.StartElement) + if !ok || !strings.EqualFold(e.Name.Local, "meta") { + continue + } + if attrValue(e.Attr, "name") != "go-import" { + continue + } + if f := strings.Fields(attrValue(e.Attr, "content")); len(f) == 3 { + imports = append(imports, metaImport{ + Prefix: f[0], + VCS: f[1], + RepoRoot: f[2], + }) + } + } + return +} + +// attrValue returns the attribute value for the case-insensitive key +// `name', or the empty string if nothing is found. +func attrValue(attrs []xml.Attr, name string) string { + for _, a := range attrs { + if strings.EqualFold(a.Name.Local, name) { + return a.Value + } + } + return "" +} |