mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-11-25 11:16:11 +01:00
78e6b21c1a
The code for checking if a commit has caused a change in a PR is extremely inefficient and affects the head repository instead of using a temporary repository. This PR therefore makes several significant improvements: * A temporary repo like that used in merging. * The diff code is then significant improved to use a three-way diff instead of comparing diffs (possibly binary) line-by-line - in memory... Ref #22578 Signed-off-by: Andrew Thornton <art27@cantab.net>
42 lines
903 B
Go
42 lines
903 B
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package util
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
)
|
|
|
|
// ReadAtMost reads at most len(buf) bytes from r into buf.
|
|
// It returns the number of bytes copied. n is only less than len(buf) if r provides fewer bytes.
|
|
// If EOF occurs while reading, err will be nil.
|
|
func ReadAtMost(r io.Reader, buf []byte) (n int, err error) {
|
|
n, err = io.ReadFull(r, buf)
|
|
if err == io.EOF || err == io.ErrUnexpectedEOF {
|
|
err = nil
|
|
}
|
|
return n, err
|
|
}
|
|
|
|
// ErrNotEmpty is an error reported when there is a non-empty reader
|
|
var ErrNotEmpty = errors.New("not-empty")
|
|
|
|
// IsEmptyReader reads a reader and ensures it is empty
|
|
func IsEmptyReader(r io.Reader) (err error) {
|
|
var buf [1]byte
|
|
|
|
for {
|
|
n, err := r.Read(buf[:])
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
if n > 0 {
|
|
return ErrNotEmpty
|
|
}
|
|
}
|
|
}
|