remove duplicate code and other cleanup

clippy_dev/Cargo.toml

 [package]
-authors = ["Philipp Hansch <dev@phansch.net>"]
-edition = "2018"
 name = "clippy_dev"
 version = "0.0.1"
+authors = ["Philipp Hansch <dev@phansch.net>"]
+edition = "2018"
 
 [dependencies]
 bytecount = "0.6"

clippy_dev/src/crater.rs

@@ -14,8 +14,14 @@
 
 use serde::{Deserialize, Serialize};
 
-// crate data we stored in the toml, can have multiple versions.
-// if so, one TomlKrate maps to several KrateSources
+// use this to store the crates when interacting with the crates.toml file
+#[derive(Debug, Serialize, Deserialize)]
+struct CrateList {
+    crates: HashMap<String, Vec<String>>,
+}
+
+// crate data we stored in the toml, can have multiple versions per crate
+// A single TomlCrate is laster mapped to several CrateSources in that case
 struct TomlCrate {
     name: String,
     versions: Vec<String>,
@@ -28,12 +34,6 @@ struct CrateSource {
     version: String,
 }
 
-// use this to store the crates when interacting with the crates.toml file
-#[derive(Debug, Serialize, Deserialize)]
-struct CrateList {
-    crates: HashMap<String, Vec<String>>,
-}
-
 // represents the extracted sourcecode of a crate
 #[derive(Debug)]
 struct Crate {
@@ -70,14 +70,8 @@ fn download_and_extract(&self) -> Crate {
             // unzip the tarball
             let ungz_tar = flate2::read::GzDecoder::new(std::fs::File::open(&krate_file_path).unwrap());
             // extract the tar archive
-            let mut archiv = tar::Archive::new(ungz_tar);
-            archiv.unpack(&extract_dir).expect("Failed to extract!");
-
-            // unzip the tarball
-            let ungz_tar = flate2::read::GzDecoder::new(std::fs::File::open(&krate_file_path).unwrap());
-            // extract the tar archive
-            let mut archiv = tar::Archive::new(ungz_tar);
-            archiv.unpack(&extract_dir).expect("Failed to extract!");
+            let mut archive = tar::Archive::new(ungz_tar);
+            archive.unpack(&extract_dir).expect("Failed to extract!");
         }
         // crate is extracted, return a new Krate object which contains the path to the extracted
         // sources that clippy can check
@@ -132,7 +126,7 @@ fn run_clippy_lints(&self, cargo_clippy_path: &PathBuf) -> Vec<String> {
             })
             .collect();
 
-        // sort messages alphabtically to avoid noise in the logs
+        // sort messages alphabetically to avoid noise in the logs
         output.sort();
         output
     }

mini-crater/logs.txt

@@ -1423,6 +1423,7 @@ iron-0.6.1/src/request/mod.rs:85:24: binding's name is too similar to existing b
 iron-0.6.1/src/request/url.rs:109:5: this method could have a `#[must_use]` attribute
 iron-0.6.1/src/request/url.rs:117:5: this method could have a `#[must_use]` attribute
 iron-0.6.1/src/request/url.rs:124:9: use of deprecated macro `try`: use the `?` operator instead
+iron-0.6.1/src/request/url.rs:129:1: an implementation of `From` is preferred since it gives you `Into<_>` for free where the reverse isn't true
 iron-0.6.1/src/request/url.rs:21:14: you should put bare URLs between `<`/`>` or make a proper Markdown link
 iron-0.6.1/src/request/url.rs:22:5: docs for function returning `Result` missing `# Errors` section
 iron-0.6.1/src/request/url.rs:31:5: docs for function returning `Result` missing `# Errors` section