acb2964d65
Some minor improvements, but biggest for here is ErrPipeListenerClosed is no longer an errors.New where the string matches the text of the now exported net.ErrClosed in the stdlib, but is just assigned to net.ErrClosed directly. This should allow us to get rid of the string check for "use of closed network connection" here now.. Signed-off-by: Daniel Canter <dcanter@microsoft.com>
60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
// Copyright 2018 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.
|
|
|
|
package packages
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"sort"
|
|
)
|
|
|
|
// Visit visits all the packages in the import graph whose roots are
|
|
// pkgs, calling the optional pre function the first time each package
|
|
// is encountered (preorder), and the optional post function after a
|
|
// package's dependencies have been visited (postorder).
|
|
// The boolean result of pre(pkg) determines whether
|
|
// the imports of package pkg are visited.
|
|
func Visit(pkgs []*Package, pre func(*Package) bool, post func(*Package)) {
|
|
seen := make(map[*Package]bool)
|
|
var visit func(*Package)
|
|
visit = func(pkg *Package) {
|
|
if !seen[pkg] {
|
|
seen[pkg] = true
|
|
|
|
if pre == nil || pre(pkg) {
|
|
paths := make([]string, 0, len(pkg.Imports))
|
|
for path := range pkg.Imports {
|
|
paths = append(paths, path)
|
|
}
|
|
sort.Strings(paths) // Imports is a map, this makes visit stable
|
|
for _, path := range paths {
|
|
visit(pkg.Imports[path])
|
|
}
|
|
}
|
|
|
|
if post != nil {
|
|
post(pkg)
|
|
}
|
|
}
|
|
}
|
|
for _, pkg := range pkgs {
|
|
visit(pkg)
|
|
}
|
|
}
|
|
|
|
// PrintErrors prints to os.Stderr the accumulated errors of all
|
|
// packages in the import graph rooted at pkgs, dependencies first.
|
|
// PrintErrors returns the number of errors printed.
|
|
func PrintErrors(pkgs []*Package) int {
|
|
var n int
|
|
Visit(pkgs, nil, func(pkg *Package) {
|
|
for _, err := range pkg.Errors {
|
|
fmt.Fprintln(os.Stderr, err)
|
|
n++
|
|
}
|
|
})
|
|
return n
|
|
}
|