mirror of https://github.com/go-gitea/gitea.git
44 lines
978 B
Go
44 lines
978 B
Go
// +build !norwfs
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package dotgit
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import (
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"os"
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"gopkg.in/src-d/go-git.v4/plumbing"
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"gopkg.in/src-d/go-git.v4/utils/ioutil"
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)
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func (d *DotGit) setRef(fileName, content string, old *plumbing.Reference) (err error) {
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// If we are not checking an old ref, just truncate the file.
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mode := os.O_RDWR | os.O_CREATE
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if old == nil {
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mode |= os.O_TRUNC
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}
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f, err := d.fs.OpenFile(fileName, mode, 0666)
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if err != nil {
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return err
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}
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defer ioutil.CheckClose(f, &err)
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// Lock is unlocked by the deferred Close above. This is because Unlock
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// does not imply a fsync and thus there would be a race between
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// Unlock+Close and other concurrent writers. Adding Sync to go-billy
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// could work, but this is better (and avoids superfluous syncs).
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err = f.Lock()
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if err != nil {
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return err
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}
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// this is a no-op to call even when old is nil.
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err = d.checkReferenceAndTruncate(f, old)
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if err != nil {
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return err
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}
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_, err = f.Write([]byte(content))
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return err
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}
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