1 files changed, 109 insertions, 0 deletions

diff --git a/vendor/golang.org/x/tools/go/buildutil/fakecontext.go b/vendor/golang.org/x/tools/go/buildutil/fakecontext.go
new file mode 100644
index 0000000..8b7f066
--- /dev/null
+++ b/vendor/golang.org/x/tools/go/buildutil/fakecontext.go
@@ -0,0 +1,109 @@
+package buildutil
+
+import (
+        "fmt"
+        "go/build"
+        "io"
+        "io/ioutil"
+        "os"
+        "path"
+        "path/filepath"
+        "sort"
+        "strings"
+        "time"
+)
+
+// FakeContext returns a build.Context for the fake file tree specified
+// by pkgs, which maps package import paths to a mapping from file base
+// names to contents.
+//
+// The fake Context has a GOROOT of "/go" and no GOPATH, and overrides
+// the necessary file access methods to read from memory instead of the
+// real file system.
+//
+// Unlike a real file tree, the fake one has only two levels---packages
+// and files---so ReadDir("/go/src/") returns all packages under
+// /go/src/ including, for instance, "math" and "math/big".
+// ReadDir("/go/src/math/big") would return all the files in the
+// "math/big" package.
+//
+func FakeContext(pkgs map[string]map[string]string) *build.Context {
+        clean := func(filename string) string {
+                f := path.Clean(filepath.ToSlash(filename))
+                // Removing "/go/src" while respecting segment
+                // boundaries has this unfortunate corner case:
+                if f == "/go/src" {
+                        return ""
+                }
+                return strings.TrimPrefix(f, "/go/src/")
+        }
+
+        ctxt := build.Default // copy
+        ctxt.GOROOT = "/go"
+        ctxt.GOPATH = ""
+        ctxt.Compiler = "gc"
+        ctxt.IsDir = func(dir string) bool {
+                dir = clean(dir)
+                if dir == "" {
+                        return true // needed by (*build.Context).SrcDirs
+                }
+                return pkgs[dir] != nil
+        }
+        ctxt.ReadDir = func(dir string) ([]os.FileInfo, error) {
+                dir = clean(dir)
+                var fis []os.FileInfo
+                if dir == "" {
+                        // enumerate packages
+                        for importPath := range pkgs {
+                                fis = append(fis, fakeDirInfo(importPath))
+                        }
+                } else {
+                        // enumerate files of package
+                        for basename := range pkgs[dir] {
+                                fis = append(fis, fakeFileInfo(basename))
+                        }
+                }
+                sort.Sort(byName(fis))
+                return fis, nil
+        }
+        ctxt.OpenFile = func(filename string) (io.ReadCloser, error) {
+                filename = clean(filename)
+                dir, base := path.Split(filename)
+                content, ok := pkgs[path.Clean(dir)][base]
+                if !ok {
+                        return nil, fmt.Errorf("file not found: %s", filename)
+                }
+                return ioutil.NopCloser(strings.NewReader(content)), nil
+        }
+        ctxt.IsAbsPath = func(path string) bool {
+                path = filepath.ToSlash(path)
+                // Don't rely on the default (filepath.Path) since on
+                // Windows, it reports virtual paths as non-absolute.
+                return strings.HasPrefix(path, "/")
+        }
+        return &ctxt
+}
+
+type byName []os.FileInfo
+
+func (s byName) Len() int           { return len(s) }
+func (s byName) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() }
+
+type fakeFileInfo string
+
+func (fi fakeFileInfo) Name() string    { return string(fi) }
+func (fakeFileInfo) Sys() interface{}   { return nil }
+func (fakeFileInfo) ModTime() time.Time { return time.Time{} }
+func (fakeFileInfo) IsDir() bool        { return false }
+func (fakeFileInfo) Size() int64        { return 0 }
+func (fakeFileInfo) Mode() os.FileMode  { return 0644 }
+
+type fakeDirInfo string
+
+func (fd fakeDirInfo) Name() string    { return string(fd) }
+func (fakeDirInfo) Sys() interface{}   { return nil }
+func (fakeDirInfo) ModTime() time.Time { return time.Time{} }
+func (fakeDirInfo) IsDir() bool        { return true }
+func (fakeDirInfo) Size() int64        { return 0 }
+func (fakeDirInfo) Mode() os.FileMode  { return 0755 }