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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
use bstr::ByteSlice;
use std::path::Path;
use tracing::{debug, instrument};
use tvix_castore::{
blobservice::BlobService, directoryservice::DirectoryService, import::fs::ingest_path, Node,
PathComponent,
};
use nix_compat::{
nixhash::{CAHash, NixHash},
store_path::{self, StorePathRef},
};
use crate::{
nar::NarCalculationService,
pathinfoservice::PathInfoService,
proto::{nar_info, NarInfo, PathInfo},
};
impl From<CAHash> for nar_info::Ca {
fn from(value: CAHash) -> Self {
let hash_type: nar_info::ca::Hash = (&value).into();
let digest: bytes::Bytes = value.hash().to_string().into();
nar_info::Ca {
r#type: hash_type.into(),
digest,
}
}
}
pub fn log_node(name: &[u8], node: &Node, path: &Path) {
match node {
Node::Directory { digest, .. } => {
debug!(
path = ?path,
name = %name.as_bstr(),
digest = %digest,
"import successful",
)
}
Node::File { digest, .. } => {
debug!(
path = ?path,
name = %name.as_bstr(),
digest = %digest,
"import successful"
)
}
Node::Symlink { target } => {
debug!(
path = ?path,
name = %name.as_bstr(),
target = ?target,
"import successful"
)
}
}
}
/// Transform a path into its base name and returns an [`std::io::Error`] if it is `..` or if the
/// basename is not valid unicode.
#[inline]
pub fn path_to_name(path: &Path) -> std::io::Result<&str> {
path.file_name()
.and_then(|file_name| file_name.to_str())
.ok_or_else(|| {
std::io::Error::new(
std::io::ErrorKind::InvalidInput,
"path must not be .. and the basename valid unicode",
)
})
}
/// Takes the NAR size, SHA-256 of the NAR representation, the root node and optionally
/// a CA hash information.
///
/// Returns the path information object for a NAR-style object.
///
/// This [`PathInfo`] can be further filled for signatures, deriver or verified for the expected
/// hashes.
#[inline]
pub fn derive_nar_ca_path_info(
nar_size: u64,
nar_sha256: [u8; 32],
ca: Option<&CAHash>,
name: bytes::Bytes,
root_node: Node,
) -> PathInfo {
// assemble the [crate::proto::PathInfo] object.
PathInfo {
node: Some(tvix_castore::proto::Node::from_name_and_node(
name, root_node,
)),
// There's no reference scanning on path contents ingested like this.
references: vec![],
narinfo: Some(NarInfo {
nar_size,
nar_sha256: nar_sha256.to_vec().into(),
signatures: vec![],
reference_names: vec![],
deriver: None,
ca: ca.map(|ca_hash| ca_hash.into()),
}),
}
}
/// Ingest the contents at the given path `path` into castore, and registers the
/// resulting root node in the passed PathInfoService, using the "NAR sha256
/// digest" and the passed name for output path calculation.
#[instrument(skip_all, fields(store_name=name, path=?path), err)]
pub async fn import_path_as_nar_ca<BS, DS, PS, NS, P>(
path: P,
name: &str,
blob_service: BS,
directory_service: DS,
path_info_service: PS,
nar_calculation_service: NS,
) -> Result<StorePathRef, std::io::Error>
where
P: AsRef<Path> + std::fmt::Debug,
BS: BlobService + Clone,
DS: DirectoryService,
PS: AsRef<dyn PathInfoService>,
NS: NarCalculationService,
{
let root_node = ingest_path(blob_service, directory_service, path.as_ref())
.await
.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?;
// Ask for the NAR size and sha256
let (nar_size, nar_sha256) = nar_calculation_service.calculate_nar(&root_node).await?;
// Calculate the output path. This might still fail, as some names are illegal.
// FUTUREWORK: express the `name` at the type level to be valid and move the conversion
// at the caller level.
let output_path = store_path::build_nar_based_store_path(&nar_sha256, name).map_err(|_| {
std::io::Error::new(
std::io::ErrorKind::InvalidData,
format!("invalid name: {}", name),
)
})?;
let name: PathComponent = output_path
.to_string()
.as_str()
.try_into()
.expect("Tvix bug: StorePath must be PathComponent");
log_node(name.as_ref(), &root_node, path.as_ref());
let path_info = derive_nar_ca_path_info(
nar_size,
nar_sha256,
Some(&CAHash::Nar(NixHash::Sha256(nar_sha256))),
name.into(),
root_node,
);
// This new [`PathInfo`] that we get back from there might contain additional signatures or
// information set by the service itself. In this function, we silently swallow it because
// callers don't really need it.
let _path_info = path_info_service.as_ref().put(path_info).await?;
Ok(output_path)
}
#[cfg(test)]
mod tests {
use std::{ffi::OsStr, path::PathBuf};
use crate::import::path_to_name;
use rstest::rstest;
#[rstest]
#[case::simple_path("a/b/c", "c")]
#[case::simple_path_containing_dotdot("a/b/../c", "c")]
#[case::path_containing_multiple_dotdot("a/b/../c/d/../e", "e")]
fn test_path_to_name(#[case] path: &str, #[case] expected_name: &str) {
let path: PathBuf = path.into();
assert_eq!(path_to_name(&path).expect("must succeed"), expected_name);
}
#[rstest]
#[case::path_ending_in_dotdot(b"a/b/..")]
#[case::non_unicode_path(b"\xf8\xa1\xa1\xa1\xa1")]
fn test_invalid_path_to_name(#[case] invalid_path: &[u8]) {
let path: PathBuf = unsafe { OsStr::from_encoded_bytes_unchecked(invalid_path) }.into();
path_to_name(&path).expect_err("must fail");
}
}
|
