envmnt/
file.rs

1//! # file
2//!
3//! File operation.
4//!
5
6#[cfg(test)]
7#[path = "./file_test.rs"]
8mod file_test;
9
10use crate::bulk;
11use crate::errors::EnvmntError;
12use crate::types::EnvmntResult;
13use fsio::error::FsIOError;
14use fsio::file::read_text_file;
15use indexmap::IndexMap;
16
17pub(crate) fn empty_evaluate_fn(key: String, value: String) -> Option<(String, String)> {
18    Some((key, value))
19}
20
21pub(crate) fn load_file(file: &str) -> EnvmntResult<()> {
22    evaluate_and_load_file(file, empty_evaluate_fn)
23}
24
25pub(crate) fn evaluate_and_load_file<F>(file: &str, evaluate: F) -> EnvmntResult<()>
26where
27    F: Fn(String, String) -> Option<(String, String)>,
28{
29    match parse_file(file) {
30        Ok(env) => {
31            bulk::evaluate_and_set_all(&env, evaluate);
32
33            Ok(())
34        }
35        Err(error) => Err(error),
36    }
37}
38
39pub(crate) fn parse_file(file: &str) -> EnvmntResult<IndexMap<String, String>> {
40    match read_text_file(file) {
41        Ok(env_content) => {
42            let env = parse_env_file_content(&env_content);
43
44            Ok(env)
45        }
46        Err(error) => Err(create_read_file_error(error)),
47    }
48}
49
50fn create_read_file_error(error: FsIOError) -> EnvmntError {
51    EnvmntError::ReadFile("Unable to read file.", error)
52}
53
54pub(crate) fn parse_env_file_content(env_content: &str) -> IndexMap<String, String> {
55    let mut env: IndexMap<String, String> = IndexMap::new();
56
57    let lines: Vec<&str> = env_content.split('\n').collect();
58
59    for mut line in lines {
60        line = line.trim();
61
62        if line.len() > 0 && !line.starts_with("#") {
63            let env_part: Vec<&str> = line.splitn(2, '=').collect();
64
65            if env_part.len() == 2 {
66                let key = env_part[0].trim().to_string();
67                let mut value = env_part[1].trim().to_string();
68
69                value = value
70                    .replace("\\\"", "\"")
71                    .replace("\\n", "\n")
72                    .replace("\\r", "\r");
73
74                if value.starts_with('"') && value.ends_with('"') {
75                    value.remove(0);
76                    value.pop();
77                }
78
79                env.insert(key, value);
80            }
81        }
82    }
83
84    env
85}
envmnt/file.rs

envmnt/
file.rs
