liboxen 0.10.0-alpha0

Oxen is a fast, unstructured data version control, to help version datasets, written in Rust.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

use crate::constants::{self};
use crate::core::db;
use crate::core::db::path_db;
use crate::core::db::tree_db::{TreeObject, TreeObjectChild};

use crate::error::OxenError;

use crate::model::{Commit, LocalRepository};
use crate::util;

use rocksdb::{DBWithThreadMode, MultiThreaded};

use std::path::{Path, PathBuf};

use super::CommitEntryWriter;

pub struct TreeObjectReader {
    files_db: DBWithThreadMode<MultiThreaded>,
    schemas_db: DBWithThreadMode<MultiThreaded>,
    dirs_db: DBWithThreadMode<MultiThreaded>,
    vnodes_db: DBWithThreadMode<MultiThreaded>,
    dir_hashes_db: DBWithThreadMode<MultiThreaded>,
}

impl TreeObjectReader {
    pub fn objects_dir(path: &Path) -> PathBuf {
        util::fs::oxen_hidden_dir(path).join(Path::new(constants::OBJECTS_DIR))
    }

    pub fn files_db_dir(repo: &LocalRepository) -> PathBuf {
        util::fs::oxen_hidden_dir(&repo.path)
            .join(constants::OBJECTS_DIR)
            .join(constants::OBJECT_FILES_DIR)
    }

    pub fn schemas_db_dir(repo: &LocalRepository) -> PathBuf {
        util::fs::oxen_hidden_dir(&repo.path)
            .join(constants::OBJECTS_DIR)
            .join(constants::OBJECT_SCHEMAS_DIR)
    }

    pub fn dirs_db_dir(repo: &LocalRepository) -> PathBuf {
        util::fs::oxen_hidden_dir(&repo.path)
            .join(constants::OBJECTS_DIR)
            .join(constants::OBJECT_DIRS_DIR)
    }

    pub fn vnodes_db_dir(repo: &LocalRepository) -> PathBuf {
        util::fs::oxen_hidden_dir(&repo.path)
            .join(constants::OBJECTS_DIR)
            .join(constants::OBJECT_VNODES_DIR)
    }

    // pub fn temp_commit_hashes_db_dir(repo: &LocalRepository) -> PathBuf {
    //     util::fs::oxen_hidden_dir(&repo.path)
    //         .join(constants::OBJECTS_DIR)
    //         .join("commit-hashes")
    // }

    pub fn commit_dir_hash_db(path: &Path, commit_id: &str) -> PathBuf {
        CommitEntryWriter::commit_dir(path, commit_id).join(constants::DIR_HASHES_DIR)
    }

    pub fn new(
        repository: &LocalRepository,
        commit: &Commit,
    ) -> Result<TreeObjectReader, OxenError> {
        let files_db_path = TreeObjectReader::files_db_dir(repository);
        let schemas_db_path = TreeObjectReader::schemas_db_dir(repository);
        let dirs_db_path = TreeObjectReader::dirs_db_dir(repository);
        let vnodes_db_path = TreeObjectReader::vnodes_db_dir(repository);
        // let temp_commit_hashes_db_path = TreeObjectReader::temp_commit_hashes_db_dir(&repository);

        for path in &[
            &files_db_path,
            &schemas_db_path,
            &dirs_db_path,
            &vnodes_db_path,
            // &temp_commit_hashes_db_path,
        ] {
            if !path.exists() {
                util::fs::create_dir_all(path)?;
            }
        }

        let opts = db::opts::default();

        Ok(TreeObjectReader {
            files_db: DBWithThreadMode::open_for_read_only(
                &opts,
                dunce::simplified(&files_db_path),
                false,
            )?,
            schemas_db: DBWithThreadMode::open_for_read_only(
                &opts,
                dunce::simplified(&schemas_db_path),
                false,
            )?,
            dirs_db: DBWithThreadMode::open_for_read_only(
                &opts,
                dunce::simplified(&dirs_db_path),
                false,
            )?,
            vnodes_db: DBWithThreadMode::open_for_read_only(
                &opts,
                dunce::simplified(&vnodes_db_path),
                false,
            )?,
            dir_hashes_db: DBWithThreadMode::open_for_read_only(
                &opts,
                dunce::simplified(&TreeObjectReader::commit_dir_hash_db(
                    &repository.path,
                    &commit.id,
                )),
                false,
            )?,
        })
    }
    pub fn get_node_from_child(
        &self,
        child: &TreeObjectChild,
    ) -> Result<Option<TreeObject>, OxenError> {
        match child {
            TreeObjectChild::File { hash, .. } => path_db::get_entry(&self.files_db, hash),
            TreeObjectChild::Dir { hash, .. } => path_db::get_entry(&self.dirs_db, hash),
            TreeObjectChild::VNode { hash, .. } => path_db::get_entry(&self.vnodes_db, hash),
            TreeObjectChild::Schema { hash, .. } => path_db::get_entry(&self.schemas_db, hash),
        }
    }

    pub fn get_root_node(&self) -> Result<Option<TreeObject>, OxenError> {
        let root_hash: String = path_db::get_entry(&self.dir_hashes_db, "")?.unwrap();
        path_db::get_entry(&self.dirs_db, root_hash)
    }
}