adjust lint groups, start fixing lints

crates/core/src/args.rs

@@ -1,5 +1,6 @@
 use std::path::PathBuf;
 
+use anyhow::{Context, Result};
 use clap::{Arg, ArgMatches, Command};
 use path_absolutize::Absolutize;
 
@@ -71,12 +72,16 @@ pub fn get() -> clap::ArgMatches {
     get_arg_parser().get_matches()
 }
 
-pub(crate) fn get_absolutized_file_paths(arg_match: &ArgMatches) -> Vec<PathBuf> {
-    arg_match
+pub(crate) fn get_absolutized_file_paths(arg_match: &ArgMatches) -> Result<Vec<PathBuf>> {
+    Ok(arg_match
         .get_many::<String>("files")
-        .unwrap()
+        .context("getting files from args")?
         .cloned()
         .map(PathBuf::from)
-        .map(|path| path.absolutize().unwrap().into_owned())
-        .collect()
+        .map(|path| {
+            path.absolutize()
+                .expect("absolute path should exist")
+                .into_owned()
+        })
+        .collect())
 }

crates/core/src/backend/backend_trait.rs

@@ -30,13 +30,15 @@ pub(crate) trait Backend: Debug {
     /// Get all packages that were installed in the system explicitly.
     fn get_explicitly_installed_packages(&self) -> Result<HashSet<Package>>;
 
-    fn assign_group(&self, to_assign: Vec<(Package, Rc<Group>)>) {
+    fn assign_group(&self, to_assign: Vec<(Package, Rc<Group>)>) -> Result<()> {
         let group_package_map = get_group_packages_map(to_assign);
         let section_header = format!("[{}]", self.get_section());
 
         for (group, packages) in group_package_map {
-            group.save_packages(&section_header, &packages);
+            group.save_packages(&section_header, &packages)?;
         }
+
+        Ok(())
     }
 
     /// Install the specified packages.
@@ -125,7 +127,9 @@ fn get_group_packages_map(
             group_package_map.insert(group.clone(), vec![]);
         }
 
-        let inner = group_package_map.get_mut(&group).unwrap();
+        let inner = group_package_map
+            .get_mut(&group)
+            .expect("either it was already there or we created it");
         inner.push(p);
     }
 

crates/core/src/cmd.rs

@@ -7,7 +7,11 @@ use crate::env::get_editor;
 
 pub fn run_edit_command(files: &[PathBuf]) -> Result<ExitStatus> {
     let mut cmd = Command::new(get_editor().context("getting suitable editor")?);
-    cmd.current_dir(files[0].parent().unwrap());
+    cmd.current_dir(
+        files[0]
+            .parent()
+            .context("getting parent dir of first file argument")?,
+    );
     for f in files {
         cmd.arg(f.to_string_lossy().to_string());
     }

crates/core/src/config.rs

@@ -30,7 +30,7 @@ impl Config {
             };
         }
 
-        let content = from_file.unwrap();
+        let content = from_file.expect("we already handled that error");
 
         serde_yaml::from_str(&content).context("parsing yaml config")
     }

crates/core/src/core.rs

@@ -26,7 +26,7 @@ pub struct Pacdef {
 
 impl Pacdef {
     #[must_use]
-    pub fn new(args: ArgMatches, config: Config, groups: HashSet<Group>) -> Self {
+    pub const fn new(args: ArgMatches, config: Config, groups: HashSet<Group>) -> Self {
         Self {
             args,
             config,
@@ -106,6 +106,7 @@ impl Pacdef {
         to_install.install_missing_packages()
     }
 
+    #[allow(clippy::unused_self)]
     fn edit_group_files(&self, groups: &ArgMatches) -> Result<()> {
         let group_dir = crate::path::get_pacdef_group_dir()?;
 
@@ -135,6 +136,7 @@ impl Pacdef {
         Ok(())
     }
 
+    #[allow(clippy::unused_self)]
     fn show_version(self) {
         println!("{}", get_version_string());
     }
@@ -188,7 +190,10 @@ impl Pacdef {
     }
 
     fn show_group_content(&self, groups: &ArgMatches) -> Result<()> {
-        let mut iter = groups.get_many::<String>("group").unwrap().peekable();
+        let mut iter = groups
+            .get_many::<String>("group")
+            .context("getting groups from args")?
+            .peekable();
 
         let show_more_than_one_group = iter.size_hint().0 > 1;
 
@@ -217,12 +222,17 @@ impl Pacdef {
         Ok(())
     }
 
+    #[allow(clippy::unused_self)]
     fn import_groups(&self, args: &ArgMatches) -> Result<()> {
-        let files = args::get_absolutized_file_paths(args);
+        let files = args::get_absolutized_file_paths(args)?;
         let groups_dir = get_pacdef_group_dir()?;
 
         for target in files {
-            let target_name = target.file_name().unwrap().to_str().unwrap();
+            let target_name = target
+                .file_name()
+                .context("path should not end in '..'")?
+                .to_str()
+                .context("filename is not valid UTF-8")?;
 
             if !target.exists() {
                 println!("file {target_name} does not exist, skipping");
@@ -242,6 +252,7 @@ impl Pacdef {
         Ok(())
     }
 
+    #[allow(clippy::unused_self)]
     fn remove_groups(&self, arg_match: &ArgMatches) -> Result<()> {
         let paths = get_assumed_group_file_names(arg_match)?;
 
@@ -256,6 +267,7 @@ impl Pacdef {
         Ok(())
     }
 
+    #[allow(clippy::unused_self)]
     fn new_groups(&self, arg: &ArgMatches) -> Result<()> {
         let paths = get_assumed_group_file_names(arg)?;
 
@@ -284,7 +296,7 @@ fn get_assumed_group_file_names(arg_match: &ArgMatches) -> Result<Vec<PathBuf>>
 
     let paths: Vec<_> = arg_match
         .get_many::<String>("groups")
-        .unwrap()
+        .context("getting groups from args")?
         .map(|s| {
             let mut possible_group_file = groups_dir.clone();
             possible_group_file.push(s);

crates/core/src/grouping/group.rs

@@ -31,7 +31,7 @@ impl Group {
             }
 
             let group =
-                Group::try_from(&path).with_context(|| format!("reading group file {path:?}"))?;
+                Self::try_from(&path).with_context(|| format!("reading group file {path:?}"))?;
 
             result.insert(group);
         }
@@ -111,17 +111,21 @@ impl Group {
         })
     }
 
-    pub(crate) fn save_packages(&self, section_header: &str, packages: &[Package]) {
-        let mut content = read_to_string(&self.path).unwrap();
+    pub(crate) fn save_packages(&self, section_header: &str, packages: &[Package]) -> Result<()> {
+        let mut content = read_to_string(&self.path)
+            .with_context(|| format!("reading existing file contents from {:?}", &self.path))?;
 
         if content.contains(section_header) {
-            write_packages_to_existing_section(&mut content, section_header, packages);
+            write_packages_to_existing_section(&mut content, section_header, packages)
+                .context("existing section")?;
         } else {
             add_new_section_with_packages(&mut content, section_header, packages);
         }
 
-        let mut file = File::create(&self.path).unwrap();
-        write!(file, "{content}").unwrap();
+        let mut file = File::create(&self.path)
+            .with_context(|| format!("creating descriptor to output file {:?}", &self.path))?;
+
+        write!(file, "{content}").with_context(|| format!("writing file {:?}", &self.path))
     }
 }
 
@@ -146,9 +150,9 @@ fn write_packages_to_existing_section(
     group_file_content: &mut String,
     section_header: &str,
     packages: &[Package],
-) {
+) -> Result<()> {
     let idx_of_first_package_line_in_section =
-        find_first_package_line_in_section(group_file_content, section_header);
+        find_first_package_line_in_section(group_file_content, section_header)?;
 
     let after = group_file_content.split_off(idx_of_first_package_line_in_section);
 
@@ -157,13 +161,22 @@ fn write_packages_to_existing_section(
     }
 
     group_file_content.push_str(&after);
+    Ok(())
 }
 
-fn find_first_package_line_in_section(group_file_content: &str, section_header: &str) -> usize {
-    let section_start = group_file_content.find(section_header).unwrap();
-    let distance_to_next_newline = group_file_content[section_start..].find('\n').unwrap();
+fn find_first_package_line_in_section(
+    group_file_content: &str,
+    section_header: &str,
+) -> Result<usize> {
+    let section_start = group_file_content
+        .find(section_header)
+        .context("finding first package after section header")?;
 
-    section_start + distance_to_next_newline + 1 // + 1 to be after the newline
+    let distance_to_next_newline = group_file_content[section_start..]
+        .find('\n')
+        .context("getting next newline")?;
+
+    Ok(section_start + distance_to_next_newline + 1) // + 1 to be after the newline
 }
 
 fn add_new_section_with_packages(

crates/core/src/grouping/package.rs

@@ -27,7 +27,7 @@ impl From<String> for Package {
 impl Package {
     fn split_into_name_and_repo(s: &str) -> (String, Option<String>) {
         let mut iter = s.split('/').rev();
-        let name = iter.next().unwrap().to_string();
+        let name = iter.next().expect("we checked that earlier").to_string();
         let repo = iter.next().map(|s| s.to_string());
         (name, repo)
     }
@@ -95,6 +95,7 @@ mod tests {
         assert_eq!(repo, None);
     }
 
+    #[allow(clippy::unwrap_used)]
     #[test]
     fn from() {
         let x = "myrepo/somepackage  #  ".to_string();

crates/core/src/grouping/section.rs

@@ -32,9 +32,15 @@ impl Section {
             .to_string();
 
         let mut packages = HashSet::new();
-        // `while let` is unstable, unfortunately
-        while iter.peek().is_some() && !iter.peek().unwrap().starts_with('[') {
-            if let Some(package) = Package::try_from(iter.next().unwrap()) {
+        // `while let` chains are unstable, unfortunately
+        while iter.peek().is_some()
+            && !iter
+                .peek()
+                .expect("we checked this is some")
+                .starts_with('[')
+        {
+            if let Some(package) = Package::try_from(iter.next().expect("we checked this is some"))
+            {
                 packages.insert(package);
             }
         }

crates/core/src/lib.rs

@@ -1,3 +1,12 @@
+#![warn(
+    clippy::as_conversions,
+    clippy::use_debug,
+    clippy::unwrap_used,
+    clippy::wildcard_dependencies,
+    clippy::use_self,
+    clippy::unused_self
+)]
+
 mod action;
 pub mod args;
 mod backend;

crates/core/src/review/strategy.rs

@@ -40,7 +40,7 @@ impl Strategy {
         }
 
         if !self.assign_group.is_empty() {
-            self.backend.assign_group(self.assign_group);
+            self.backend.assign_group(self.assign_group)?;
         }
 
         Ok(())

crates/core/src/ui.rs

@@ -5,7 +5,7 @@ use termios::*;
 
 pub(crate) fn get_user_confirmation() -> Result<bool> {
     print!("Continue? [Y/n] ");
-    std::io::stdout().flush().unwrap();
+    std::io::stdout().flush().context("flushing stdout")?;
 
     let mut reply = String::new();
     std::io::stdin()
@@ -29,7 +29,9 @@ pub(crate) fn read_single_char_from_terminal() -> Result<char> {
     io::stdin()
         .read_exact(&mut input[..])
         .context("reading one byte from stdin")?;
-    let result = input[0] as char;
+    let result: char = input[0]
+        .try_into()
+        .context("reading a single byte from stdin")?;
     // stdin is not echoed automatically in this terminal mode
     println!("{result}");