179 lines
3.4 KiB
Go
179 lines
3.4 KiB
Go
// Copyright 2017 The Xorm Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build go1.1
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package main
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import (
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"fmt"
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"io"
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"os"
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"runtime"
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"strings"
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"sync"
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"text/template"
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"unicode"
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"unicode/utf8"
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)
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// Test that go1.1 tag above is included in builds. main.go refers to this definition.
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const go11tag = true
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const version = "0.4.0617"
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var supportedDrivers = map[string]string{
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"mysql": "github.com/go-sql-driver/mysql",
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"mymysql": "github.com/ziutek/mymysql/godrv",
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"postgres": "github.com/lib/pq",
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"mssql": "github.com/denisenkom/go-mssqldb",
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}
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// Commands lists the available commands and help topics.
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// The order here is the order in which they are printed by 'gopm help'.
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var commands = []*Command{
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CmdReverse,
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CmdShell,
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CmdDump,
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CmdDriver,
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CmdSource,
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}
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func init() {
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runtime.GOMAXPROCS(runtime.NumCPU())
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}
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func main() {
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// Check length of arguments.
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args := os.Args[1:]
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if len(args) < 1 {
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usage()
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return
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}
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// Show help documentation.
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if args[0] == "help" {
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help(args[1:])
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return
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}
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// Check commands and run.
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for _, comm := range commands {
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if comm.Name() == args[0] && comm.Run != nil {
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comm.Run(comm, args[1:])
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exit()
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return
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}
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}
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fmt.Fprintf(os.Stderr, "xorm: unknown subcommand %q\nRun 'xorm help' for usage.\n", args[0])
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setExitStatus(2)
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exit()
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}
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var exitStatus = 0
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var exitMu sync.Mutex
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func setExitStatus(n int) {
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exitMu.Lock()
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if exitStatus < n {
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exitStatus = n
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}
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exitMu.Unlock()
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}
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var usageTemplate = `xorm is a database tool based xorm package.
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Version:
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` + version + `
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Usage:
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xorm command [arguments]
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The commands are:
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{{range .}}{{if .Runnable}}
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{{.Name | printf "%-11s"}} {{.Short}}{{end}}{{end}}
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Use "xorm help [command]" for more information about a command.
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Additional help topics:
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{{range .}}{{if not .Runnable}}
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{{.Name | printf "%-11s"}} {{.Short}}{{end}}{{end}}
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Use "xorm help [topic]" for more information about that topic.
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`
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var helpTemplate = `{{if .Runnable}}usage: xorm {{.UsageLine}}
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{{end}}{{.Long | trim}}
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`
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// tmpl executes the given template text on data, writing the result to w.
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func tmpl(w io.Writer, text string, data interface{}) {
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t := template.New("top")
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t.Funcs(template.FuncMap{"trim": strings.TrimSpace, "capitalize": capitalize})
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template.Must(t.Parse(text))
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if err := t.Execute(w, data); err != nil {
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panic(err)
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}
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}
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func capitalize(s string) string {
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if s == "" {
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return s
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}
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r, n := utf8.DecodeRuneInString(s)
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return string(unicode.ToTitle(r)) + s[n:]
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}
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func printUsage(w io.Writer) {
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tmpl(w, usageTemplate, commands)
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}
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func usage() {
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printUsage(os.Stderr)
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os.Exit(2)
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}
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// help implements the 'help' command.
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func help(args []string) {
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if len(args) == 0 {
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printUsage(os.Stdout)
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// not exit 2: succeeded at 'gopm help'.
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return
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}
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if len(args) != 1 {
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fmt.Fprintf(os.Stderr, "usage: xorm help command\n\nToo many arguments given.\n")
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os.Exit(2) // failed at 'gopm help'
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}
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arg := args[0]
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for _, cmd := range commands {
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if cmd.Name() == arg {
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tmpl(os.Stdout, helpTemplate, cmd)
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// not exit 2: succeeded at 'gopm help cmd'.
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return
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}
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}
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fmt.Fprintf(os.Stderr, "Unknown help topic %#q. Run 'xorm help'.\n", arg)
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os.Exit(2) // failed at 'gopm help cmd'
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}
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var atexitFuncs []func()
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func atexit(f func()) {
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atexitFuncs = append(atexitFuncs, f)
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}
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func exit() {
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for _, f := range atexitFuncs {
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f()
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}
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os.Exit(exitStatus)
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}
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