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// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"context"
"errors"
"io"
"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.
func openRepo(ctx context.Context, groupPath []string, repoName string) (repo *git.Repository, description string, repoID int, err error) {
var fsPath string
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.
type displayTreeEntry struct {
Name string
Mode string
Size int64
IsFile bool
IsSubtree bool
}
func makeDisplayTree(tree *object.Tree) (displayTree []displayTreeEntry) {
for _, entry := range tree.Entries {
displayEntry := displayTreeEntry{}
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
}
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})
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
}
func fmtCommitAsPatch(commit *object.Commit) (parentCommitHash plumbing.Hash, patch *object.Patch, err error) {
var parentCommit *object.Commit
var commitTree *object.Tree
parentCommit, err = commit.Parent(0)
if errors.Is(err, object.ErrParentNotFound) {
if commitTree, err = commit.Tree(); err != nil {
return
}
if patch, err = (&object.Tree{}).Patch(commitTree); err != nil {
return
}
} else if err != nil {
return
} else {
parentCommitHash = parentCommit.Hash
if patch, err = parentCommit.Patch(commit); err != nil {
return
}
}
return
}
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