mirror of
https://github.com/golang/go
synced 2024-10-03 08:21:21 -06:00
d65a5cce89
parsing and printing to new syntax. Use -oldparser to parse the old syntax, use -oldprinter to print the old syntax. 2) Change default gofmt formatting settings to use tabs for indentation only and to use spaces for alignment. This will make the code alignment insensitive to an editor's tabwidth. Use -spaces=false to use tabs for alignment. 3) Manually changed src/exp/parser/parser_test.go so that it doesn't try to parse the parser's source files using the old syntax (they have new syntax now). 4) gofmt -w src misc test/bench 4th set of files. R=rsc CC=golang-dev https://golang.org/cl/180049
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2009 The Go 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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package patch
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import "os"
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// An Op is a single operation to execute to apply a patch.
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type Op struct {
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Verb Verb // action
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Src string // source file
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Dst string // destination file
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Mode int // mode for destination (if non-zero)
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Data []byte // data for destination (if non-nil)
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}
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// Apply applies the patch set to the files named in the patch set,
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// constructing an in-memory copy of the new file state.
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// It is the client's job to write the changes to the file system
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// if desired.
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//
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// The function readFile should return the contents of the named file.
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// Typically this function will be io.ReadFile.
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//
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func (set *Set) Apply(readFile func(string) ([]byte, os.Error)) ([]Op, os.Error) {
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op := make([]Op, len(set.File))
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for i, f := range set.File {
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o := &op[i]
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o.Verb = f.Verb
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o.Src = f.Src
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o.Dst = f.Dst
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o.Mode = f.NewMode
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if f.Diff != NoDiff || o.Verb != Edit {
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// Clients assume o.Data == nil means no data diff.
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// Start with a non-nil data.
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var old []byte = make([]byte, 0) // not nil
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var err os.Error
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if f.Src != "" {
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old, err = readFile(f.Src)
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if err != nil {
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return nil, &os.PathError{string(f.Verb), f.Src, err}
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}
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}
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o.Data, err = f.Diff.Apply(old)
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if err != nil {
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return nil, &os.PathError{string(f.Verb), f.Src, err}
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}
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}
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}
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return op, nil
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}
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