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// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"fmt"
"net/http"
"strings"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/filemode"
"github.com/go-git/go-git/v5/plumbing/format/diff"
"github.com/go-git/go-git/v5/plumbing/object"
"go.lindenii.runxiyu.org/lindenii-common/misc"
)
// The file patch type from go-git isn't really usable in HTML templates
// either.
type usableFilePatch struct {
From diff.File
To diff.File
Chunks []usableChunk
}
type usableChunk struct {
Operation diff.Operation
Content string
}
func httpHandleRepoCommit(w http.ResponseWriter, r *http.Request, params map[string]any) {
var repo *git.Repository
var commitIDStrSpec, commitIDStrSpecNoSuffix string
var commitID plumbing.Hash
var parentCommitHash plumbing.Hash
var commitObj *object.Commit
var commitIDStr string
var err error
var patch *object.Patch
repo, commitIDStrSpec = params["repo"].(*git.Repository), params["commit_id"].(string)
commitIDStrSpecNoSuffix = strings.TrimSuffix(commitIDStrSpec, ".patch")
commitID = plumbing.NewHash(commitIDStrSpecNoSuffix)
if commitObj, err = repo.CommitObject(commitID); err != nil {
http.Error(w, "Error getting commit object: "+err.Error(), http.StatusInternalServerError)
return
}
if commitIDStrSpecNoSuffix != commitIDStrSpec {
var patchStr string
if patchStr, err = fmtCommitPatch(commitObj); err != nil {
http.Error(w, "Error formatting patch: "+err.Error(), http.StatusInternalServerError)
return
}
fmt.Fprintln(w, patchStr)
return
}
commitIDStr = commitObj.Hash.String()
if commitIDStr != commitIDStrSpec {
http.Redirect(w, r, commitIDStr, http.StatusSeeOther)
return
}
params["commit_object"] = commitObj
params["commit_id"] = commitIDStr
parentCommitHash, patch, err = fmtCommitAsPatch(commitObj)
if err != nil {
http.Error(w, "Error getting patch from commit: "+err.Error(), http.StatusInternalServerError)
return
}
params["parent_commit_hash"] = parentCommitHash.String()
params["patch"] = patch
params["file_patches"] = makeUsableFilePatches(patch)
renderTemplate(w, "repo_commit", params)
}
type fakeDiffFile struct {
hash plumbing.Hash
mode filemode.FileMode
path string
}
func (f fakeDiffFile) Hash() plumbing.Hash {
return f.hash
}
func (f fakeDiffFile) Mode() filemode.FileMode {
return f.mode
}
func (f fakeDiffFile) Path() string {
return f.path
}
var nullFakeDiffFile = fakeDiffFile{
hash: plumbing.NewHash("0000000000000000000000000000000000000000"),
mode: misc.First_or_panic(filemode.New("100644")),
path: "",
}
func makeUsableFilePatches(patch diff.Patch) (usableFilePatches []usableFilePatch) {
// TODO: Remove unnecessary context
// TODO: Prepend "+"/"-"/" " instead of solely distinguishing based on color
for _, filePatch := range patch.FilePatches() {
var from, to diff.File
var ufp usableFilePatch
chunks := []usableChunk{}
from, to = filePatch.Files()
if from == nil {
from = nullFakeDiffFile
}
if to == nil {
to = nullFakeDiffFile
}
for _, chunk := range filePatch.Chunks() {
var content string
content = chunk.Content()
if len(content) > 0 && content[0] == '\n' {
content = "\n" + content
} // Horrible hack to fix how browsers newlines that immediately proceed <pre>
chunks = append(chunks, usableChunk{
Operation: chunk.Type(),
Content: content,
})
}
ufp = usableFilePatch{
Chunks: chunks,
From: from,
To: to,
}
usableFilePatches = append(usableFilePatches, ufp)
}
return
}
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