mirror of
https://github.com/go-gitea/gitea
synced 2024-12-24 09:34:26 +00:00
23358bc55d
* Improve get last commit using git log --name-status git log --name-status -c provides information about the diff between a commit and its parents. Using this and adjusting the algorithm to use the first change to a path allows for a much faster generation of commit info. There is a subtle change in the results generated but this will cause the results to more closely match those from elsewhere. Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: 6543 <6543@obermui.de> Co-authored-by: techknowlogick <techknowlogick@gitea.io> Co-authored-by: Lauris BH <lauris@nix.lv>
178 lines
3.5 KiB
Go
Vendored
178 lines
3.5 KiB
Go
Vendored
package nio
|
|
|
|
import (
|
|
"io"
|
|
"sync"
|
|
)
|
|
|
|
// PipeReader is the read half of the pipe.
|
|
type PipeReader struct {
|
|
*bufpipe
|
|
}
|
|
|
|
// CloseWithError closes the reader; subsequent writes to the write half of the pipe will return the error err.
|
|
func (r *PipeReader) CloseWithError(err error) error {
|
|
if err == nil {
|
|
err = io.ErrClosedPipe
|
|
}
|
|
r.bufpipe.l.Lock()
|
|
defer r.bufpipe.l.Unlock()
|
|
if r.bufpipe.rerr == nil {
|
|
r.bufpipe.rerr = err
|
|
r.bufpipe.rwait.Signal()
|
|
r.bufpipe.wwait.Signal()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Close closes the reader; subsequent writes to the write half of the pipe will return the error io.ErrClosedPipe.
|
|
func (r *PipeReader) Close() error {
|
|
return r.CloseWithError(nil)
|
|
}
|
|
|
|
// A PipeWriter is the write half of a pipe.
|
|
type PipeWriter struct {
|
|
*bufpipe
|
|
}
|
|
|
|
// CloseWithError closes the writer; once the buffer is empty subsequent reads from the read half of the pipe will return
|
|
// no bytes and the error err, or io.EOF if err is nil. CloseWithError always returns nil.
|
|
func (w *PipeWriter) CloseWithError(err error) error {
|
|
if err == nil {
|
|
err = io.EOF
|
|
}
|
|
w.bufpipe.l.Lock()
|
|
defer w.bufpipe.l.Unlock()
|
|
if w.bufpipe.werr == nil {
|
|
w.bufpipe.werr = err
|
|
w.bufpipe.rwait.Signal()
|
|
w.bufpipe.wwait.Signal()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Close closes the writer; once the buffer is empty subsequent reads from the read half of the pipe will return
|
|
// no bytes and io.EOF after all the buffer has been read. CloseWithError always returns nil.
|
|
func (w *PipeWriter) Close() error {
|
|
return w.CloseWithError(nil)
|
|
}
|
|
|
|
type bufpipe struct {
|
|
rl sync.Mutex
|
|
wl sync.Mutex
|
|
l sync.Mutex
|
|
rwait sync.Cond
|
|
wwait sync.Cond
|
|
b Buffer
|
|
rerr error // if reader closed, error to give writes
|
|
werr error // if writer closed, error to give reads
|
|
}
|
|
|
|
func newBufferedPipe(buf Buffer) *bufpipe {
|
|
s := &bufpipe{
|
|
b: buf,
|
|
}
|
|
s.rwait.L = &s.l
|
|
s.wwait.L = &s.l
|
|
return s
|
|
}
|
|
|
|
func empty(buf Buffer) bool {
|
|
return buf.Len() == 0
|
|
}
|
|
|
|
func gap(buf Buffer) int64 {
|
|
return buf.Cap() - buf.Len()
|
|
}
|
|
|
|
func (r *PipeReader) Read(p []byte) (n int, err error) {
|
|
r.rl.Lock()
|
|
defer r.rl.Unlock()
|
|
|
|
r.l.Lock()
|
|
defer r.wwait.Signal()
|
|
defer r.l.Unlock()
|
|
|
|
for empty(r.b) {
|
|
if r.rerr != nil {
|
|
return 0, io.ErrClosedPipe
|
|
}
|
|
|
|
if r.werr != nil {
|
|
return 0, r.werr
|
|
}
|
|
|
|
r.wwait.Signal()
|
|
r.rwait.Wait()
|
|
}
|
|
|
|
n, err = r.b.Read(p)
|
|
if err == io.EOF {
|
|
err = nil
|
|
}
|
|
|
|
return n, err
|
|
}
|
|
|
|
func (w *PipeWriter) Write(p []byte) (int, error) {
|
|
var m int
|
|
var n, space int64
|
|
var err error
|
|
sliceLen := int64(len(p))
|
|
|
|
w.wl.Lock()
|
|
defer w.wl.Unlock()
|
|
|
|
w.l.Lock()
|
|
defer w.rwait.Signal()
|
|
defer w.l.Unlock()
|
|
|
|
if w.werr != nil {
|
|
return 0, io.ErrClosedPipe
|
|
}
|
|
|
|
// while there is data to write
|
|
for writeLen := sliceLen; writeLen > 0 && err == nil; writeLen = sliceLen - n {
|
|
|
|
// wait for some buffer space to become available (while no errs)
|
|
for space = gap(w.b); space == 0 && w.rerr == nil && w.werr == nil; space = gap(w.b) {
|
|
w.rwait.Signal()
|
|
w.wwait.Wait()
|
|
}
|
|
|
|
if w.rerr != nil {
|
|
err = w.rerr
|
|
break
|
|
}
|
|
|
|
if w.werr != nil {
|
|
err = io.ErrClosedPipe
|
|
break
|
|
}
|
|
|
|
// space > 0, and locked
|
|
|
|
var nn int64
|
|
if space < writeLen {
|
|
// => writeLen - space > 0
|
|
// => (sliceLen - n) - space > 0
|
|
// => sliceLen > n + space
|
|
// nn is safe to use for p[:nn]
|
|
nn = n + space
|
|
} else {
|
|
nn = sliceLen
|
|
}
|
|
|
|
m, err = w.b.Write(p[n:nn])
|
|
n += int64(m)
|
|
|
|
// one of the following cases has occurred:
|
|
// 1. done writing -> writeLen == 0
|
|
// 2. ran out of buffer space -> gap(w.b) == 0
|
|
// 3. an error occurred err != nil
|
|
// all of these cases are handled at the top of this loop
|
|
}
|
|
|
|
return int(n), err
|
|
}
|