Parsing version from Cargo.toml
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$begingroup$
I want to get version from Cargo.toml and use the value inside my app. Here is a function I wrote:
use std::fs;
pub fn get_version() -> &'static str {
let text = fs::read_to_string("Cargo.toml").unwrap();
for line in text.split("n") {
if line.starts_with("version") {
let start = line.find('"').unwrap() + 1;
let end = line.rfind('"').unwrap();
let version = &line[start..end];
return Box::leak(version.to_string().into_boxed_str());
}
}
panic!("failed parsing version from Cagro.toml");
}
Writting the function, I had some questions. So I'd like to get help from others.
- How can I replace
forandifnested blocks with iterator methods? - To return value as
staticlifetime, I usedBox::leak(version.to_string().into_boxed_str())which is too complicated (&str -> String -> Box<str>just for avoiding compile errors). How can I return&'static stror&'a strsimply without gettingcannot return value referencing local variable ...error in this case? - Can I make the code simpler? (ex: parsing the version value)
rust
asked 50 mins ago
philipjkimphilipjkim
24719
$endgroup$
add a comment |
0
$begingroup$
I want to get version from Cargo.toml and use the value inside my app. Here is a function I wrote:
use std::fs;
pub fn get_version() -> &'static str {
let text = fs::read_to_string("Cargo.toml").unwrap();
for line in text.split("n") {
if line.starts_with("version") {
let start = line.find('"').unwrap() + 1;
let end = line.rfind('"').unwrap();
let version = &line[start..end];
return Box::leak(version.to_string().into_boxed_str());
}
}
panic!("failed parsing version from Cagro.toml");
}
Writting the function, I had some questions. So I'd like to get help from others.
- How can I replace
forandifnested blocks with iterator methods? - To return value as
staticlifetime, I usedBox::leak(version.to_string().into_boxed_str())which is too complicated (&str -> String -> Box<str>just for avoiding compile errors). How can I return&'static stror&'a strsimply without gettingcannot return value referencing local variable ...error in this case? - Can I make the code simpler? (ex: parsing the version value)
rust
asked 50 mins ago
philipjkimphilipjkim
24719
$endgroup$
add a comment |
0
0
0
$begingroup$
I want to get version from Cargo.toml and use the value inside my app. Here is a function I wrote:
use std::fs;
pub fn get_version() -> &'static str {
let text = fs::read_to_string("Cargo.toml").unwrap();
for line in text.split("n") {
if line.starts_with("version") {
let start = line.find('"').unwrap() + 1;
let end = line.rfind('"').unwrap();
let version = &line[start..end];
return Box::leak(version.to_string().into_boxed_str());
}
}
panic!("failed parsing version from Cagro.toml");
}
Writting the function, I had some questions. So I'd like to get help from others.
- How can I replace
forandifnested blocks with iterator methods? - To return value as
staticlifetime, I usedBox::leak(version.to_string().into_boxed_str())which is too complicated (&str -> String -> Box<str>just for avoiding compile errors). How can I return&'static stror&'a strsimply without gettingcannot return value referencing local variable ...error in this case? - Can I make the code simpler? (ex: parsing the version value)
rust
asked 50 mins ago
philipjkimphilipjkim
24719
$endgroup$
I want to get version from Cargo.toml and use the value inside my app. Here is a function I wrote:
use std::fs;
pub fn get_version() -> &'static str {
let text = fs::read_to_string("Cargo.toml").unwrap();
for line in text.split("n") {
if line.starts_with("version") {
let start = line.find('"').unwrap() + 1;
let end = line.rfind('"').unwrap();
let version = &line[start..end];
return Box::leak(version.to_string().into_boxed_str());
}
}
panic!("failed parsing version from Cagro.toml");
}
Writting the function, I had some questions. So I'd like to get help from others.
- How can I replace
forandifnested blocks with iterator methods? - To return value as
staticlifetime, I usedBox::leak(version.to_string().into_boxed_str())which is too complicated (&str -> String -> Box<str>just for avoiding compile errors). How can I return&'static stror&'a strsimply without gettingcannot return value referencing local variable ...error in this case? - Can I make the code simpler? (ex: parsing the version value)
rust
rust
asked 50 mins ago
philipjkimphilipjkim
24719
asked 50 mins ago
philipjkimphilipjkim
24719
asked 50 mins ago
philipjkimphilipjkim
24719
asked 50 mins ago
philipjkimphilipjkim
24719
asked 50 mins ago
philipjkimphilipjkim
24719
24719
add a comment |
add a comment |
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