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Enable show more files in diff for git <2.31 (#17733)

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Unfortunately due to a misread on my behalf I missed that git diff only learned
--skip-to in version 2.31.0. Thus this functionality was not working on older versions
of git.

This PR adds a handler that simply allows for us to skip reading the diffs until
we find the correct file to skip to.

Fix #17731

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-11-20 13:50:00 +00:00 • committed by GitHub
parent 0d69e64e03
commit 931d0cf854
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 253 additions and 32 deletions
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193
services/gitdiff/gitdiff_test.go
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@ -104,6 +104,177 @@ func TestDiffToHTML(t *testing.T) {
}, DiffLineAdd))
}
func TestParsePatch_skipTo(t *testing.T) {
type testcase struct {
name string
gitdiff string
wantErr bool
addition int
deletion int
oldFilename string
filename string
skipTo string
}
tests := []testcase{
{
name: "readme.md2readme.md",
gitdiff: `diff --git "a/A \\ B" "b/A \\ B"
--- "a/A \\ B"
+++ "b/A \\ B"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off
diff --git "\\a/README.md" "\\b/README.md"
--- "\\a/README.md"
+++ "\\b/README.md"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off
`,
addition: 4,
deletion: 1,
filename: "README.md",
oldFilename: "README.md",
skipTo: "README.md",
},
{
name: "A \\ B",
gitdiff: `diff --git "a/A \\ B" "b/A \\ B"
--- "a/A \\ B"
+++ "b/A \\ B"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off`,
addition: 4,
deletion: 1,
filename: "A \\ B",
oldFilename: "A \\ B",
skipTo: "A \\ B",
},
{
name: "A \\ B",
gitdiff: `diff --git "\\a/README.md" "\\b/README.md"
--- "\\a/README.md"
+++ "\\b/README.md"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off
diff --git "a/A \\ B" "b/A \\ B"
--- "a/A \\ B"
+++ "b/A \\ B"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off`,
addition: 4,
deletion: 1,
filename: "A \\ B",
oldFilename: "A \\ B",
skipTo: "A \\ B",
},
{
name: "readme.md2readme.md",
gitdiff: `diff --git "a/A \\ B" "b/A \\ B"
--- "a/A \\ B"
+++ "b/A \\ B"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off
diff --git "a/A \\ B" "b/A \\ B"
--- "a/A \\ B"
+++ "b/A \\ B"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off
diff --git "\\a/README.md" "\\b/README.md"
--- "\\a/README.md"
+++ "\\b/README.md"
@@ -1,3 +1,6 @@
# gitea-github-migrator
+
+ Build Status
- Latest Release
Docker Pulls
+ cut off
+ cut off
`,
addition: 4,
deletion: 1,
filename: "README.md",
oldFilename: "README.md",
skipTo: "README.md",
},
}
for _, testcase := range tests {
t.Run(testcase.name, func(t *testing.T) {
got, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), testcase.skipTo)
if (err != nil) != testcase.wantErr {
t.Errorf("ParsePatch(%q) error = %v, wantErr %v", testcase.name, err, testcase.wantErr)
return
}
gotMarshaled, _ := json.MarshalIndent(got, "", " ")
if got.NumFiles != 1 {
t.Errorf("ParsePath(%q) did not receive 1 file:\n%s", testcase.name, string(gotMarshaled))
return
}
if got.TotalAddition != testcase.addition {
t.Errorf("ParsePath(%q) does not have correct totalAddition %d, wanted %d", testcase.name, got.TotalAddition, testcase.addition)
}
if got.TotalDeletion != testcase.deletion {
t.Errorf("ParsePath(%q) did not have correct totalDeletion %d, wanted %d", testcase.name, got.TotalDeletion, testcase.deletion)
}
file := got.Files[0]
if file.Addition != testcase.addition {
t.Errorf("ParsePath(%q) does not have correct file addition %d, wanted %d", testcase.name, file.Addition, testcase.addition)
}
if file.Deletion != testcase.deletion {
t.Errorf("ParsePath(%q) did not have correct file deletion %d, wanted %d", testcase.name, file.Deletion, testcase.deletion)
}
if file.OldName != testcase.oldFilename {
t.Errorf("ParsePath(%q) did not have correct OldName %q, wanted %q", testcase.name, file.OldName, testcase.oldFilename)
}
if file.Name != testcase.filename {
t.Errorf("ParsePath(%q) did not have correct Name %q, wanted %q", testcase.name, file.Name, testcase.filename)
}
})
}
}
func TestParsePatch_singlefile(t *testing.T) {
type testcase struct {
name string
@ -295,7 +466,7 @@ index 6961180..9ba1a00 100644
for _, testcase := range tests {
t.Run(testcase.name, func(t *testing.T) {
got, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff))
got, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), "")
if (err != nil) != testcase.wantErr {
t.Errorf("ParsePatch(%q) error = %v, wantErr %v", testcase.name, err, testcase.wantErr)
return
@ -344,21 +515,21 @@ index 0000000..6bb8f39
diffBuilder.WriteString("+line" + strconv.Itoa(i) + "\n")
}
diff = diffBuilder.String()
result, err := ParsePatch(20, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
result, err := ParsePatch(20, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if !result.Files[0].IsIncomplete {
t.Errorf("Files should be incomplete! %v", result.Files[0])
}
result, err = ParsePatch(40, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
result, err = ParsePatch(40, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if result.Files[0].IsIncomplete {
t.Errorf("Files should not be incomplete! %v", result.Files[0])
}
result, err = ParsePatch(40, 5, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
result, err = ParsePatch(40, 5, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
@ -389,14 +560,14 @@ index 0000000..6bb8f39
diffBuilder.WriteString("+line" + strconv.Itoa(35) + "\n")
diff = diffBuilder.String()
result, err = ParsePatch(20, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
result, err = ParsePatch(20, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
if !result.Files[0].IsIncomplete {
t.Errorf("Files should be incomplete! %v", result.Files[0])
}
result, err = ParsePatch(40, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
result, err = ParsePatch(40, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
if err != nil {
t.Errorf("There should not be an error: %v", err)
}
@ -415,7 +586,7 @@ index 0000000..6bb8f39
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
@ -432,7 +603,7 @@ index 0000000..6bb8f39
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2))
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2), "")
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
@ -449,7 +620,7 @@ index 0000000..6bb8f39
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2a))
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2a), "")
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
@ -466,7 +637,7 @@ index 0000000..6bb8f39
Docker Pulls
+ cut off
+ cut off`
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff3))
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff3), "")
if err != nil {
t.Errorf("ParsePatch failed: %s", err)
}
@ -557,6 +728,6 @@ func TestNoCrashes(t *testing.T) {
}
for _, testcase := range tests {
// It shouldn't crash, so don't care about the output.
ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff))
ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), "")
}
}