mirror of
https://gitee.com/rainbond/Rainbond.git
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114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
// Copyright (C) 2014-2018 Goodrain Co., Ltd.
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// RAINBOND, Application Management Platform
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version. For any non-GPL usage of Rainbond,
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// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
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// must be obtained first.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package sources
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import (
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"io"
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"os"
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"sort"
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"github.com/docker/docker/builder/dockerfile/command"
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"github.com/docker/docker/builder/dockerfile/parser"
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)
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//Command Represents a single line (layer) in a Dockerfile.
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// For example `FROM ubuntu:xenial`
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type Command struct {
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Cmd string // lowercased command name (ex: `from`)
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SubCmd string // for ONBUILD only this holds the sub-command
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Json bool // whether the value is written in json form
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Original string // The original source line
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StartLine int // The original source line number
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Flags []string // Any flags such as `--from=...` for `COPY`.
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Value []string // The contents of the command (ex: `ubuntu:xenial`)
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}
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//IOError A failure in opening a file for reading.
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type IOError struct {
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Msg string
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}
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func (e IOError) Error() string {
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return e.Msg
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}
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//ParseError A failure in parsing the file as a dockerfile.
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type ParseError struct {
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Msg string
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}
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func (e ParseError) Error() string {
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return e.Msg
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}
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//AllCmds List all legal cmds in a dockerfile
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func AllCmds() []string {
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var ret []string
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for k := range command.Commands {
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ret = append(ret, k)
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}
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sort.Strings(ret)
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return ret
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}
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//ParseReader Parse a Dockerfile from a reader. A ParseError may occur.
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func ParseReader(file io.Reader) ([]Command, error) {
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directive := parser.Directive{LookingForDirectives: true}
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parser.SetEscapeToken(parser.DefaultEscapeToken, &directive)
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ast, err := parser.Parse(file, &directive)
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if err != nil {
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return nil, ParseError{err.Error()}
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}
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var ret []Command
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for _, child := range ast.Children {
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cmd := Command{
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Cmd: child.Value,
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Original: child.Original,
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StartLine: child.StartLine,
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Flags: child.Flags,
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}
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// Only happens for ONBUILD
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if child.Next != nil && len(child.Next.Children) > 0 {
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cmd.SubCmd = child.Next.Children[0].Value
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child = child.Next.Children[0]
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}
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cmd.Json = child.Attributes["json"]
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for n := child.Next; n != nil; n = n.Next {
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cmd.Value = append(cmd.Value, n.Value)
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}
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ret = append(ret, cmd)
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}
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return ret, nil
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}
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//ParseFile Parse a Dockerfile from a filename. An IOError or ParseError may occur.
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func ParseFile(filename string) ([]Command, error) {
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file, err := os.Open(filename)
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if err != nil {
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return nil, IOError{err.Error()}
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}
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defer file.Close()
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return ParseReader(file)
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}
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