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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
mod command;
mod docker;
mod git;
use anyhow::{anyhow, Context, Error};
use cargo_metadata::MetadataCommand;
use chrono::{Date, Datelike, Utc};
use docker::{Docker, Volume};
use fehler::{throw, throws};
use git::Repo;
use log::info;
use sha2::Digest;
use std::fs;
use std::io::Write;
use std::path::{Path, PathBuf};
use zip::ZipWriter;
pub static DEFAULT_REPO: &str = "https://github.com/softprops/lambda-rust";
pub static DEFAULT_REV: &str = "master";
pub static DEFAULT_CONTAINER_CMD: &str = "docker";
#[throws]
fn ensure_dir_exists(path: &Path) {
let _ = fs::create_dir(path);
if !path.is_dir() {
throw!(anyhow!("failed to create directory {}", path.display()));
}
}
#[throws]
fn get_package_binaries(path: &Path) -> Vec<String> {
let metadata = MetadataCommand::new().current_dir(path).no_deps().exec()?;
let mut names = Vec::new();
for package in metadata.packages {
for target in package.targets {
if target.kind.contains(&"bin".to_string()) {
names.push(target.name);
}
}
}
names
}
fn make_zip_name(name: &str, contents: &[u8], when: Date<Utc>) -> String {
let hash = sha2::Sha256::digest(&contents);
format!(
"{}-{}{:02}{:02}-{:.16x}.zip",
name,
when.year(),
when.month(),
when.day(),
hash
)
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct LambdaBuilder {
pub repo: String,
pub rev: String,
pub container_cmd: String,
pub project: PathBuf,
}
impl Default for LambdaBuilder {
fn default() -> Self {
LambdaBuilder {
repo: DEFAULT_REPO.into(),
rev: DEFAULT_REV.into(),
container_cmd: DEFAULT_CONTAINER_CMD.into(),
project: PathBuf::default(),
}
}
}
impl LambdaBuilder {
#[throws]
pub fn run(&self) -> Vec<PathBuf> {
let project_path = self.project.canonicalize().context(format!(
"failed to canonicalize {}",
self.project.display(),
))?;
ensure_dir_exists(&project_path.join("target"))?;
let output_dir = project_path.join("lambda-target");
ensure_dir_exists(&output_dir)?;
let repo_url = &self.repo;
let repo = Repo::new(output_dir.join("lambda-rust"));
ensure_dir_exists(&repo.path)?;
if !repo.path.join(".git").exists() {
repo.clone(repo_url)?;
} else {
repo.remote_set_url(repo_url)?;
repo.fetch()?;
};
repo.checkout(&self.rev)?;
let image_tag = format!("lambda-build-{:.16}", repo.rev_parse("HEAD")?);
let docker = Docker::new(self.container_cmd.clone());
docker.build(&repo.path, &image_tag)?;
let registry_dir = output_dir.join("cargo-registry");
ensure_dir_exists(®istry_dir)?;
let git_dir = output_dir.join("cargo-git");
ensure_dir_exists(&git_dir)?;
docker.run(
&[
Volume {
src: project_path.clone(),
dst: Path::new("/code").into(),
read_only: true,
},
Volume {
src: registry_dir,
dst: Path::new("/cargo/registry").into(),
read_only: false,
},
Volume {
src: git_dir,
dst: Path::new("/cargo/git").into(),
read_only: false,
},
Volume {
src: output_dir.clone(),
dst: Path::new("/code/target").into(),
read_only: false,
},
],
&image_tag,
)?;
let binaries = get_package_binaries(&project_path)?;
let mut zip_names = Vec::new();
let mut zip_paths = Vec::new();
for name in binaries {
let src = output_dir.join("lambda/release").join(&name);
let contents = fs::read(&src)
.context(format!("failed to read {}", src.display()))?;
let dst_name = make_zip_name(&name, &contents, Utc::now().date());
let dst = output_dir.join(&dst_name);
zip_names.push(dst_name);
zip_paths.push(dst.clone());
info!("writing {}", dst.display());
let file = fs::File::create(&dst)
.context(format!("failed to create {}", dst.display()))?;
let mut zip = ZipWriter::new(file);
let options = zip::write::FileOptions::default()
.compression_method(zip::CompressionMethod::Deflated);
zip.start_file("bootstrap", options)?;
zip.write_all(&contents)?;
zip.finish()?;
}
let latest_path = output_dir.join("latest");
info!("writing {}", latest_path.display());
fs::write(latest_path, zip_names.join("\n") + "\n")?;
zip_paths
}
}
#[cfg(test)]
mod tests {
use super::*;
use chrono::TimeZone;
#[test]
fn test_zip_name() {
let when = Utc.ymd(2020, 8, 31);
assert_eq!(
make_zip_name("testexecutable", "testcontents".as_bytes(), when),
"testexecutable-20200831-7097a82a108e78da.zip"
);
}
}