pkg/email: move patch parsing from pkg/kernel

ParsePatch is used by appengine app.
Appengine apps can't depend on syscall/unsafe,
but pkg/kernel currently does.
Move patch parsing to pkg/email which does not
depend on syscall/unsafe.

1 files changed, 0 insertions, 69 deletions

diff --git a/pkg/kernel/patch.go b/pkg/kernel/patch.go
deleted file mode 100644
index b8e30dbec..000000000
--- a/pkg/kernel/patch.go
+++ /dev/null
@@ -1,69 +0,0 @@
-// Copyright 2017 syzkaller project authors. All rights reserved.
-// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
-
-package kernel
-
-import (
-	"bufio"
-	"fmt"
-	"strings"
-)
-
-func ParsePatch(text string) (title string, diff string, err error) {
-	s := bufio.NewScanner(strings.NewReader(text))
-	parsingDiff := false
-	diffStarted := false
-	lastLine := ""
-	for s.Scan() {
-		ln := s.Text()
-		if strings.HasPrefix(ln, "--- a/") || strings.HasPrefix(ln, "--- /dev/null") {
-			parsingDiff = true
-			if title == "" {
-				title = lastLine
-			}
-		}
-		if parsingDiff {
-			if ln == "--" || ln == "-- " {
-				break
-			}
-			diff += ln + "\n"
-			continue
-		}
-		if strings.HasPrefix(ln, "diff --git") {
-			diffStarted = true
-			continue
-		}
-		if strings.HasPrefix(ln, "Subject: ") {
-			title = ln[len("Subject: "):]
-			continue
-		}
-		if ln == "" || title != "" || diffStarted {
-			continue
-		}
-		lastLine = ln
-		if strings.HasPrefix(ln, "    ") {
-			title = ln[4:]
-		}
-	}
-	if err = s.Err(); err != nil {
-		return
-	}
-	if strings.Contains(strings.ToLower(title), "[patch") {
-		pos := strings.IndexByte(title, ']')
-		if pos == -1 {
-			err = fmt.Errorf("title contains '[patch' but not ']'")
-			return
-		}
-		title = title[pos+1:]
-	}
-	title = strings.TrimSpace(title)
-	if title == "" {
-		err = fmt.Errorf("failed to extract title")
-		return
-	}
-	if diff == "" {
-		err = fmt.Errorf("failed to extract diff")
-		return
-	}
-	return
-}