Git: Return fsPath from OpenRepo
// SPDX-License-Identifier: AGPL-3.0-only // SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org> package main import ( "context" "errors" "io" "iter" "os" "strings" "github.com/go-git/go-git/v5" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/object" "github.com/jackc/pgx/v5/pgtype" ) // openRepo opens a git repository by group and repo name. // // TODO: This should be deprecated in favor of doing it in the relevant // request/router context in the future, as it cannot cover the nuance of // fields needed.
func openRepo(ctx context.Context, groupPath []string, repoName string) (repo *git.Repository, description string, repoID int, err error) {
var fsPath string
func openRepo(ctx context.Context, groupPath []string, repoName string) (repo *git.Repository, description string, repoID int, fsPath string, err error) {
err = database.QueryRow(ctx, `
WITH RECURSIVE group_path_cte AS (
-- Start: match the first name in the path where parent_group IS NULL
SELECT
id,
parent_group,
name,
1 AS depth
FROM groups
WHERE name = ($1::text[])[1]
AND parent_group IS NULL
UNION ALL
-- Recurse: join next segment of the path
SELECT
g.id,
g.parent_group,
g.name,
group_path_cte.depth + 1
FROM groups g
JOIN group_path_cte ON g.parent_group = group_path_cte.id
WHERE g.name = ($1::text[])[group_path_cte.depth + 1]
AND group_path_cte.depth + 1 <= cardinality($1::text[])
)
SELECT
r.filesystem_path,
COALESCE(r.description, ''),
r.id
FROM group_path_cte g
JOIN repos r ON r.group_id = g.id
WHERE g.depth = cardinality($1::text[])
AND r.name = $2
`, pgtype.FlatArray[string](groupPath), repoName).Scan(&fsPath, &description, &repoID)
if err != nil {
return
}
repo, err = git.PlainOpen(fsPath)
return
}
// go-git's tree entries are not friendly for use in HTML templates.
// This struct is a wrapper that is friendlier for use in templating.
type displayTreeEntry struct {
Name string
Mode string
Size int64
IsFile bool
IsSubtree bool
}
// makeDisplayTree takes git trees of form [object.Tree] and creates a slice of
// [displayTreeEntry] for easier templating.
func makeDisplayTree(tree *object.Tree) (displayTree []displayTreeEntry) {
for _, entry := range tree.Entries {
displayEntry := displayTreeEntry{} //exhaustruct:ignore
var err error
var osMode os.FileMode
if osMode, err = entry.Mode.ToOSFileMode(); err != nil {
displayEntry.Mode = "x---------"
} else {
displayEntry.Mode = osMode.String()
}
displayEntry.IsFile = entry.Mode.IsFile()
if displayEntry.Size, err = tree.Size(entry.Name); err != nil {
displayEntry.Size = 0
}
displayEntry.Name = strings.TrimPrefix(entry.Name, "/")
displayTree = append(displayTree, displayEntry)
}
return displayTree
}
// commitIterSeqErr creates an [iter.Seq[*object.Commit]] from an
// [object.CommitIter], and additionally returns a pointer to error.
// The pointer to error is guaranteed to be populated with either nil or the
// error returned by the commit iterator after the returned iterator is
// finished.
func commitIterSeqErr(commitIter object.CommitIter) (iter.Seq[*object.Commit], *error) {
var err error
return func(yield func(*object.Commit) bool) {
for {
commit, err2 := commitIter.Next()
if err2 != nil {
if errors.Is(err2, io.EOF) {
return
}
err = err2
return
}
if !yield(commit) {
return
}
}
}, &err
}
// getRecentCommits fetches numCommits commits, starting from the headHash in a
// repo.
func getRecentCommits(repo *git.Repository, headHash plumbing.Hash, numCommits int) (recentCommits []*object.Commit, err error) {
var commitIter object.CommitIter
var thisCommit *object.Commit
commitIter, err = repo.Log(&git.LogOptions{From: headHash}) //exhaustruct:ignore
if err != nil {
return nil, err
}
recentCommits = make([]*object.Commit, 0)
defer commitIter.Close()
if numCommits < 0 {
for {
thisCommit, err = commitIter.Next()
if errors.Is(err, io.EOF) {
return recentCommits, nil
} else if err != nil {
return nil, err
}
recentCommits = append(recentCommits, thisCommit)
}
} else {
for range numCommits {
thisCommit, err = commitIter.Next()
if errors.Is(err, io.EOF) {
return recentCommits, nil
} else if err != nil {
return nil, err
}
recentCommits = append(recentCommits, thisCommit)
}
}
return recentCommits, err
}
// getRecentCommitsDisplay generates a slice of [commitDisplay] friendly for
// use in HTML templates, consisting of numCommits commits from headhash in the
// repo.
func getRecentCommitsDisplay(repo *git.Repository, headHash plumbing.Hash, numCommits int) (recentCommits []commitDisplay, err error) {
var commitIter object.CommitIter
var thisCommit *object.Commit
commitIter, err = repo.Log(&git.LogOptions{From: headHash}) //exhaustruct:ignore
if err != nil {
return nil, err
}
recentCommits = make([]commitDisplay, 0)
defer commitIter.Close()
if numCommits < 0 {
for {
thisCommit, err = commitIter.Next()
if errors.Is(err, io.EOF) {
return recentCommits, nil
} else if err != nil {
return nil, err
}
recentCommits = append(recentCommits, commitDisplay{
thisCommit.Hash,
thisCommit.Author,
thisCommit.Committer,
thisCommit.Message,
thisCommit.TreeHash,
})
}
} else {
for range numCommits {
thisCommit, err = commitIter.Next()
if errors.Is(err, io.EOF) {
return recentCommits, nil
} else if err != nil {
return nil, err
}
recentCommits = append(recentCommits, commitDisplay{
thisCommit.Hash,
thisCommit.Author,
thisCommit.Committer,
thisCommit.Message,
thisCommit.TreeHash,
})
}
}
return recentCommits, err
}
type commitDisplay struct {
Hash plumbing.Hash
Author object.Signature
Committer object.Signature
Message string
TreeHash plumbing.Hash
}
// commitToPatch creates an [object.Patch] from the first parent of a given
// [object.Commit].
//
// TODO: This function should be deprecated as it only diffs with the first
// parent and does not correctly handle merge commits.
func commitToPatch(commit *object.Commit) (parentCommitHash plumbing.Hash, patch *object.Patch, err error) {
var parentCommit *object.Commit
var commitTree *object.Tree
parentCommit, err = commit.Parent(0)
switch {
case errors.Is(err, object.ErrParentNotFound):
if commitTree, err = commit.Tree(); err != nil {
return
}
if patch, err = nullTree.Patch(commitTree); err != nil {
return
}
case err != nil:
return
default:
parentCommitHash = parentCommit.Hash
if patch, err = parentCommit.Patch(commit); err != nil {
return
}
}
return
}
var nullTree object.Tree
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
package main
import (
"errors"
"net/http"
"strconv"
"strings"
"github.com/jackc/pgx/v5"
"go.lindenii.runxiyu.org/lindenii-common/clog"
)
type forgeHTTPRouter struct{}
// ServeHTTP handles all incoming HTTP requests and routes them to the correct
// location.
//
// TODO: This function is way too large.
func (router *forgeHTTPRouter) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
var remoteAddr string
if config.HTTP.ReverseProxy {
remoteAddrs, ok := request.Header["X-Forwarded-For"]
if ok && len(remoteAddrs) == 1 {
remoteAddr = remoteAddrs[0]
} else {
remoteAddr = request.RemoteAddr
}
} else {
remoteAddr = request.RemoteAddr
}
clog.Info("Incoming HTTP: " + remoteAddr + " " + request.Method + " " + request.RequestURI)
var segments []string
var err error
var sepIndex int
params := make(map[string]any)
if segments, _, err = parseReqURI(request.RequestURI); err != nil {
errorPage400(writer, params, "Error parsing request URI: "+err.Error())
return
}
dirMode := false
if segments[len(segments)-1] == "" {
dirMode = true
segments = segments[:len(segments)-1]
}
params["url_segments"] = segments
params["dir_mode"] = dirMode
params["global"] = globalData
var userID int // 0 for none
userID, params["username"], err = getUserFromRequest(request)
params["user_id"] = userID
if err != nil && !errors.Is(err, http.ErrNoCookie) && !errors.Is(err, pgx.ErrNoRows) {
errorPage500(writer, params, "Error getting user info from request: "+err.Error())
return
}
if userID == 0 {
params["user_id_string"] = ""
} else {
params["user_id_string"] = strconv.Itoa(userID)
}
for _, v := range segments {
if strings.Contains(v, ":") {
errorPage400Colon(writer, params)
return
}
}
if len(segments) == 0 {
httpHandleIndex(writer, request, params)
return
}
if segments[0] == "-" {
if len(segments) < 2 {
errorPage404(writer, params)
return
} else if len(segments) == 2 && redirectDir(writer, request) {
return
}
switch segments[1] {
case "man":
manHandler.ServeHTTP(writer, request)
return
case "static":
staticHandler.ServeHTTP(writer, request)
return
case "source":
sourceHandler.ServeHTTP(writer, request)
return
}
}
if segments[0] == "-" {
switch segments[1] {
case "login":
httpHandleLogin(writer, request, params)
return
case "users":
httpHandleUsers(writer, request, params)
return
case "gc":
httpHandleGC(writer, request, params)
return
default:
errorPage404(writer, params)
return
}
}
sepIndex = -1
for i, part := range segments {
if part == "-" {
sepIndex = i
break
}
}
params["separator_index"] = sepIndex
var groupPath []string
var moduleType string
var moduleName string
if sepIndex > 0 {
groupPath = segments[:sepIndex]
} else {
groupPath = segments
}
params["group_path"] = groupPath
switch {
case sepIndex == -1:
if redirectDir(writer, request) {
return
}
httpHandleGroupIndex(writer, request, params)
case len(segments) == sepIndex+1:
errorPage404(writer, params)
return
case len(segments) == sepIndex+2:
errorPage404(writer, params)
return
default:
moduleType = segments[sepIndex+1]
moduleName = segments[sepIndex+2]
switch moduleType {
case "repos":
params["repo_name"] = moduleName
if len(segments) > sepIndex+3 {
switch segments[sepIndex+3] {
case "info":
if err = httpHandleRepoInfo(writer, request, params); err != nil {
errorPage500(writer, params, err.Error())
}
return
case "git-upload-pack":
if err = httpHandleUploadPack(writer, request, params); err != nil {
errorPage500(writer, params, err.Error())
}
return
}
}
if params["ref_type"], params["ref_name"], err = getParamRefTypeName(request); err != nil {
if errors.Is(err, errNoRefSpec) {
params["ref_type"] = ""
} else {
errorPage500(writer, params, "Error querying ref type: "+err.Error())
return
}
}
// TODO: subgroups
if params["repo"], params["repo_description"], params["repo_id"], err = openRepo(request.Context(), groupPath, moduleName); err != nil {
if params["repo"], params["repo_description"], params["repo_id"], _, err = openRepo(request.Context(), groupPath, moduleName); err != nil {
errorPage500(writer, params, "Error opening repo: "+err.Error())
return
}
if len(segments) == sepIndex+3 {
if redirectDir(writer, request) {
return
}
httpHandleRepoIndex(writer, request, params)
return
}
repoFeature := segments[sepIndex+3]
switch repoFeature {
case "tree":
if anyContain(segments[sepIndex+4:], "/") {
errorPage400(writer, params, "Repo tree paths may not contain slashes in any segments")
return
}
if dirMode {
params["rest"] = strings.Join(segments[sepIndex+4:], "/") + "/"
} else {
params["rest"] = strings.Join(segments[sepIndex+4:], "/")
}
if len(segments) < sepIndex+5 && redirectDir(writer, request) {
return
}
httpHandleRepoTree(writer, request, params)
case "branches":
if redirectDir(writer, request) {
return
}
httpHandleRepoBranches(writer, request, params)
return
case "raw":
if anyContain(segments[sepIndex+4:], "/") {
errorPage400(writer, params, "Repo tree paths may not contain slashes in any segments")
return
}
if dirMode {
params["rest"] = strings.Join(segments[sepIndex+4:], "/") + "/"
} else {
params["rest"] = strings.Join(segments[sepIndex+4:], "/")
}
if len(segments) < sepIndex+5 && redirectDir(writer, request) {
return
}
httpHandleRepoRaw(writer, request, params)
case "log":
if len(segments) > sepIndex+4 {
errorPage400(writer, params, "Too many parameters")
return
}
if redirectDir(writer, request) {
return
}
httpHandleRepoLog(writer, request, params)
case "commit":
if len(segments) != sepIndex+5 {
errorPage400(writer, params, "Incorrect number of parameters")
return
}
if redirectNoDir(writer, request) {
return
}
params["commit_id"] = segments[sepIndex+4]
httpHandleRepoCommit(writer, request, params)
case "contrib":
if redirectDir(writer, request) {
return
}
switch len(segments) {
case sepIndex + 4:
httpHandleRepoContribIndex(writer, request, params)
case sepIndex + 5:
params["mr_id"] = segments[sepIndex+4]
httpHandleRepoContribOne(writer, request, params)
default:
errorPage400(writer, params, "Too many parameters")
}
default:
errorPage404(writer, params)
return
}
default:
errorPage404(writer, params)
return
}
}
}