mirror of
https://github.com/dutchcoders/transfer.sh.git
synced 2020-11-18 19:53:40 -08:00
110 lines
3.1 KiB
Go
110 lines
3.1 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// pprof is a tool for collection, manipulation and visualization
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// of performance profiles.
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package main
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import (
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"fmt"
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"os"
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"strings"
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"syscall"
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"github.com/chzyer/readline"
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"github.com/google/pprof/driver"
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)
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func main() {
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if err := driver.PProf(&driver.Options{UI: newUI()}); err != nil {
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fmt.Fprintf(os.Stderr, "pprof: %v\n", err)
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os.Exit(2)
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}
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}
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// readlineUI implements the driver.UI interface using the
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// github.com/chzyer/readline library.
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// This is contained in pprof.go to avoid adding the readline
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// dependency in the vendored copy of pprof in the Go distribution,
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// which does not use this file.
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type readlineUI struct {
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rl *readline.Instance
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}
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func newUI() driver.UI {
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rl, err := readline.New("")
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if err != nil {
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fmt.Fprintf(os.Stderr, "readline: %v", err)
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return nil
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}
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return &readlineUI{
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rl: rl,
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}
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}
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// ReadLine returns a line of text (a command) read from the user.
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// prompt is printed before reading the command.
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func (r *readlineUI) ReadLine(prompt string) (string, error) {
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r.rl.SetPrompt(prompt)
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return r.rl.Readline()
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}
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// Print shows a message to the user.
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// It is printed over stderr as stdout is reserved for regular output.
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func (r *readlineUI) Print(args ...interface{}) {
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text := fmt.Sprint(args...)
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if !strings.HasSuffix(text, "\n") {
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text += "\n"
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}
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fmt.Fprint(r.rl.Stderr(), text)
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}
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// PrintErr shows a message to the user, colored in red for emphasis.
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// It is printed over stderr as stdout is reserved for regular output.
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func (r *readlineUI) PrintErr(args ...interface{}) {
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text := fmt.Sprint(args...)
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if !strings.HasSuffix(text, "\n") {
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text += "\n"
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}
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if readline.IsTerminal(int(syscall.Stderr)) {
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text = colorize(text)
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}
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fmt.Fprint(r.rl.Stderr(), text)
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}
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// colorize the msg using ANSI color escapes.
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func colorize(msg string) string {
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var red = 31
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var colorEscape = fmt.Sprintf("\033[0;%dm", red)
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var colorResetEscape = "\033[0m"
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return colorEscape + msg + colorResetEscape
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}
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// IsTerminal returns whether the UI is known to be tied to an
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// interactive terminal (as opposed to being redirected to a file).
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func (r *readlineUI) IsTerminal() bool {
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return readline.IsTerminal(int(syscall.Stdout))
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}
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// WantBrowser starts a browser on interactive mode.
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func (r *readlineUI) WantBrowser() bool {
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return r.IsTerminal()
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}
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// SetAutoComplete instructs the UI to call complete(cmd) to obtain
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// the auto-completion of cmd, if the UI supports auto-completion at all.
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func (r *readlineUI) SetAutoComplete(complete func(string) string) {
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// TODO: Implement auto-completion support.
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}
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