change i32 in package_parsers to uint

Signed-off-by: Luke-zhang-04 <[email protected]>

Author: Luke-zhang-04

Diff for: CONTRIBUTING.md

@@ -86,12 +86,12 @@ fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
 }
 ```
 
-3. in `src/onefetch/deps/package_parser.rs`, add a function whose name corresponds to your manager. This function should take in a `string` as the contents of the package manager file, and return `i32` as the number of dependencies
+3. in `src/onefetch/deps/package_parser.rs`, add a function whose name corresponds to your manager. This function should take in a `string` as the contents of the package manager file, and return `usize` as the number of dependencies
 ```rust
-pub fn cargo(contents: &str) -> Result<i32> {
+pub fn cargo(contents: &str) -> Result<usize> {
     let parsed = contents.parse::<Value>()?;
 
-    Ok(parsed["dependencies"].as_table().unwrap().len() as i32)
+    Ok(parsed["dependencies"].as_table().unwrap().len())
 }
 ```
 

Diff for: src/onefetch/deps/mod.rs

@@ -7,7 +7,7 @@ use {
 mod package_manager;
 mod package_parser;
 
-type DependencyParser = fn(&str) -> Result<i32>;
+type DependencyParser = fn(&str) -> Result<usize>;
 
 pub struct DependencyDetector {
     package_managers: HashMap<String, (DependencyParser, package_manager::PackageManager)>,

Diff for: src/onefetch/deps/package_parser.rs

@@ -1,26 +1,26 @@
 use crate::onefetch::error::*;
 use {regex::Regex, toml::Value};
 
-pub fn cargo(contents: &str) -> Result<i32> {
+pub fn cargo(contents: &str) -> Result<usize> {
     let parsed = contents.parse::<Value>()?;
 
-    Ok(parsed["dependencies"].as_table().unwrap().len() as i32)
+    Ok(parsed["dependencies"].as_table().unwrap().len())
 }
 
-pub fn go_modules(contents: &str) -> Result<i32> {
+pub fn go_modules(contents: &str) -> Result<usize> {
     let count = Regex::new(r"v[0-9]+")?.find_iter(contents).count();
 
-    Ok(count as i32)
+    Ok(count)
 }
 
-pub fn npm(contents: &str) -> Result<i32> {
+pub fn npm(contents: &str) -> Result<usize> {
     let parsed = json::parse(contents)?;
 
-    Ok(parsed["dependencies"].len() as i32)
+    Ok(parsed["dependencies"].len())
 }
 
-pub fn pip(contents: &str) -> Result<i32> {
+pub fn pip(contents: &str) -> Result<usize> {
     let count = Regex::new(r"(^[A-z]+)|(\n[A-z]+)")?.find_iter(contents).count();
 
-    Ok(count as i32)
+    Ok(count)
 }