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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"
)
// open_git_repo opens a git repository by group and repo name.
func open_git_repo(ctx context.Context, group_path []string, repo_name string) (repo *git.Repository, description string, repo_id int, err error) {
var fs_path 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](group_path), repo_name).Scan(&fs_path, &description, &repo_id)
if err != nil {
return
}
repo, err = git.PlainOpen(fs_path)
return
}
// go-git's tree entries are not friendly for use in HTML templates.
type display_git_tree_entry_t struct {
Name string
Mode string
Size int64
Is_file bool
Is_subtree bool
}
func build_display_git_tree(tree *object.Tree) (display_git_tree []display_git_tree_entry_t) {
for _, entry := range tree.Entries {
display_git_tree_entry := display_git_tree_entry_t{}
var err error
var os_mode os.FileMode
if os_mode, err = entry.Mode.ToOSFileMode(); err != nil {
display_git_tree_entry.Mode = "x---------"
} else {
display_git_tree_entry.Mode = os_mode.String()
}
display_git_tree_entry.Is_file = entry.Mode.IsFile()
if display_git_tree_entry.Size, err = tree.Size(entry.Name); err != nil {
display_git_tree_entry.Size = 0
}
display_git_tree_entry.Name = strings.TrimPrefix(entry.Name, "/")
display_git_tree = append(display_git_tree, display_git_tree_entry)
}
return display_git_tree
}
func get_recent_commits(repo *git.Repository, head_hash plumbing.Hash, number_of_commits int) (recent_commits []*object.Commit, err error) {
var commit_iter object.CommitIter
var this_recent_commit *object.Commit
commit_iter, err = repo.Log(&git.LogOptions{From: head_hash})
if err != nil {
return nil, err
}
recent_commits = make([]*object.Commit, 0)
defer commit_iter.Close()
if number_of_commits < 0 {
for {
this_recent_commit, err = commit_iter.Next()
if errors.Is(err, io.EOF) {
return recent_commits, nil
} else if err != nil {
return nil, err
}
recent_commits = append(recent_commits, this_recent_commit)
}
} else {
for range number_of_commits {
this_recent_commit, err = commit_iter.Next()
if errors.Is(err, io.EOF) {
return recent_commits, nil
} else if err != nil {
return nil, err
}
recent_commits = append(recent_commits, this_recent_commit)
}
}
return recent_commits, err
}
func get_patch_from_commit(commit_object *object.Commit) (parent_commit_hash plumbing.Hash, patch *object.Patch, err error) {
var parent_commit_object *object.Commit
var commit_tree *object.Tree
parent_commit_object, err = commit_object.Parent(0)
if errors.Is(err, object.ErrParentNotFound) {
if commit_tree, err = commit_object.Tree(); err != nil {
return
}
if patch, err = (&object.Tree{}).Patch(commit_tree); err != nil {
return
}
} else if err != nil {
return
} else {
parent_commit_hash = parent_commit_object.Hash
if patch, err = parent_commit_object.Patch(commit_object); err != nil {
return
}
}
return
}
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