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Fix diff path unquoting (#12554)
* Fix diff path unquoting services/gitdiff/gitdiff.go whereby there it assumed that the path would always be quoted on both sides This PR simplifies the code here and uses fmt.Fscanf to parse the strings as necessary. Fix #12546 Signed-off-by: Andrew Thornton <art27@cantab.net> * Add testcase as per @mrsdizzie Signed-off-by: Andrew Thornton <art27@cantab.net>
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@ -18,7 +18,6 @@ import (
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"os/exec"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"code.gitea.io/gitea/models"
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@ -570,41 +569,29 @@ func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*D
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break
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}
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var middle int
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// Note: In case file name is surrounded by double quotes (it happens only in git-shell).
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// e.g. diff --git "a/xxx" "b/xxx"
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hasQuote := line[len(cmdDiffHead)] == '"'
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if hasQuote {
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middle = strings.Index(line, ` "b/`)
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var a string
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var b string
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rd := strings.NewReader(line[len(cmdDiffHead):])
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char, _ := rd.ReadByte()
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_ = rd.UnreadByte()
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if char == '"' {
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fmt.Fscanf(rd, "%q ", &a)
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} else {
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middle = strings.Index(line, " b/")
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fmt.Fscanf(rd, "%s ", &a)
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}
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beg := len(cmdDiffHead)
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a := line[beg+2 : middle]
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b := line[middle+3:]
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if hasQuote {
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// Keep the entire string in double quotes for now
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a = line[beg:middle]
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b = line[middle+1:]
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var err error
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a, err = strconv.Unquote(a)
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if err != nil {
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return nil, fmt.Errorf("Unquote: %v", err)
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char, _ = rd.ReadByte()
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_ = rd.UnreadByte()
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if char == '"' {
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fmt.Fscanf(rd, "%q", &b)
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} else {
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fmt.Fscanf(rd, "%s", &b)
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}
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b, err = strconv.Unquote(b)
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if err != nil {
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return nil, fmt.Errorf("Unquote: %v", err)
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}
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// Now remove the /a /b
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a = a[2:]
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b = b[2:]
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}
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curFile = &DiffFile{
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Name: b,
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OldName: a,
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@ -112,6 +112,23 @@ func TestParsePatch(t *testing.T) {
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}
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println(result)
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var diff2a = `diff --git "a/A \\ B" b/A/B
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--- "a/A \\ B"
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+++ b/A/B
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@@ -1,3 +1,6 @@
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# gitea-github-migrator
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+
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+ Build Status
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- Latest Release
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Docker Pulls
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+ cut off
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+ cut off`
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result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2a))
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if err != nil {
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t.Errorf("ParsePatch failed: %s", err)
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}
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println(result)
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var diff3 = `diff --git a/README.md b/README.md
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--- a/README.md
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+++ b/README.md
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