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
|
use anyhow::{Context, Error, Result};
use std::{
fs::{create_dir, create_dir_all, OpenOptions},
io::{self, Write},
};
use crate::info_file::ExerciseInfo;
pub static EMBEDDED_FILES: EmbeddedFiles = rustlings_macros::include_files!();
#[derive(Clone, Copy)]
pub enum WriteStrategy {
IfNotExists,
Overwrite,
}
impl WriteStrategy {
fn write(self, path: &str, content: &[u8]) -> Result<()> {
let file = match self {
Self::IfNotExists => OpenOptions::new().create_new(true).write(true).open(path),
Self::Overwrite => OpenOptions::new()
.create(true)
.write(true)
.truncate(true)
.open(path),
};
file.with_context(|| format!("Failed to open the file `{path}` in write mode"))?
.write_all(content)
.with_context(|| format!("Failed to write the file {path}"))
}
}
struct ExerciseFiles {
exercise: &'static [u8],
solution: &'static [u8],
dir_ind: usize,
}
struct ExerciseDir {
name: &'static str,
readme: &'static [u8],
}
impl ExerciseDir {
fn init_on_disk(&self) -> Result<()> {
// 20 = 10 + 10
// exercises/ + /README.md
let mut dir_path = String::with_capacity(20 + self.name.len());
dir_path.push_str("exercises/");
dir_path.push_str(self.name);
if let Err(e) = create_dir(&dir_path) {
if e.kind() == io::ErrorKind::AlreadyExists {
return Ok(());
}
return Err(
Error::from(e).context(format!("Failed to create the directory {dir_path}"))
);
}
let mut readme_path = dir_path;
readme_path.push_str("/README.md");
WriteStrategy::Overwrite.write(&readme_path, self.readme)?;
Ok(())
}
}
pub struct EmbeddedFiles {
pub info_file: &'static str,
exercise_files: &'static [ExerciseFiles],
exercise_dirs: &'static [ExerciseDir],
}
impl EmbeddedFiles {
pub fn init_exercises_dir(&self, exercise_infos: &[ExerciseInfo]) -> Result<()> {
create_dir("exercises").context("Failed to create the directory `exercises`")?;
WriteStrategy::IfNotExists.write(
"exercises/README.md",
include_bytes!("../exercises/README.md"),
)?;
for dir in self.exercise_dirs {
dir.init_on_disk()?;
}
for (exercise_info, exercise_files) in exercise_infos.iter().zip(self.exercise_files) {
WriteStrategy::IfNotExists.write(&exercise_info.path(), exercise_files.exercise)?;
}
Ok(())
}
pub fn write_exercise_to_disk(&self, exercise_ind: usize, path: &str) -> Result<()> {
let exercise_files = &self.exercise_files[exercise_ind];
let dir = &self.exercise_dirs[exercise_files.dir_ind];
dir.init_on_disk()?;
WriteStrategy::Overwrite.write(path, exercise_files.exercise)
}
// Write the solution file to disk and return its path.
pub fn write_solution_to_disk(
&self,
exercise_ind: usize,
exercise_name: &str,
) -> Result<String> {
let exercise_files = &self.exercise_files[exercise_ind];
let dir = &self.exercise_dirs[exercise_files.dir_ind];
// 14 = 10 + 1 + 3
// solutions/ + / + .rs
let mut dir_path = String::with_capacity(14 + dir.name.len() + exercise_name.len());
dir_path.push_str("solutions/");
dir_path.push_str(dir.name);
create_dir_all(&dir_path)
.with_context(|| format!("Failed to create the directory {dir_path}"))?;
let mut solution_path = dir_path;
solution_path.push('/');
solution_path.push_str(exercise_name);
solution_path.push_str(".rs");
WriteStrategy::Overwrite.write(&solution_path, exercise_files.solution)?;
Ok(solution_path)
}
}
#[cfg(test)]
mod tests {
use serde::Deserialize;
use super::*;
#[derive(Deserialize)]
struct ExerciseInfo {
dir: String,
}
#[derive(Deserialize)]
struct InfoFile {
exercises: Vec<ExerciseInfo>,
}
#[test]
fn dirs() {
let exercises = toml_edit::de::from_str::<InfoFile>(EMBEDDED_FILES.info_file)
.expect("Failed to parse `info.toml`")
.exercises;
assert_eq!(exercises.len(), EMBEDDED_FILES.exercise_files.len());
for (exercise, exercise_files) in exercises.iter().zip(EMBEDDED_FILES.exercise_files) {
assert_eq!(
exercise.dir,
EMBEDDED_FILES.exercise_dirs[exercise_files.dir_ind].name,
);
}
}
}
|
