feat: Tweak logging and add cli option to customize log level

bin/src/cli_args.rs

@@ -23,4 +23,9 @@ pub struct CliArgs {
     /// If not provided the language will try to be inferred by the extension of the base file.
     #[arg(long)]
     pub(crate) language: Option<String>,
+
+    /// The log level provided for the execution.
+    /// If not provided defaults to INFO.
+    #[arg(long)]
+    pub(crate) log_level: Option<log::LevelFilter>,
 }

bin/src/control.rs

@@ -58,21 +58,34 @@ pub fn run_tool_on_merge_scenario(
 
     let parser_configuration = ParserConfiguration::from(language);
 
+    log::info!("Started parsing base file");
     let base_tree =
         parsing::parse_string(base, &parser_configuration).map_err(ExecutionError::ParsingError)?;
+    log::info!("Finished parsing base file");
+    log::info!("Started parsing left file");
     let left_tree =
         parsing::parse_string(left, &parser_configuration).map_err(ExecutionError::ParsingError)?;
+    log::info!("Finished parsing left file");
+    log::info!("Started parsing right file");
     let right_tree = parsing::parse_string(right, &parser_configuration)
         .map_err(ExecutionError::ParsingError)?;
+    log::info!("Finished parsing right file");
 
     let matching_configuration = matching_configuration::MatchingConfiguration::from(language);
+    log::info!("Started calculation of matchings between left and base");
     let matchings_left_base =
         matching::calculate_matchings(&left_tree, &base_tree, &matching_configuration);
+    log::info!("Finished calculation of matchings between left and base");
+    log::info!("Started calculation of matchings between right and base");
     let matchings_right_base =
         matching::calculate_matchings(&right_tree, &base_tree, &matching_configuration);
+    log::info!("Finished calculation of matchings between right and base");
+    log::info!("Started calculation of matchings between left and right");
     let matchings_left_right =
         matching::calculate_matchings(&left_tree, &right_tree, &matching_configuration);
+    log::info!("Finished calculation of matchings between left and right");
 
+    log::info!("Starting merge of the trees");
     let result = merge::merge(
         &base_tree,
         &left_tree,
@@ -82,6 +95,7 @@ pub fn run_tool_on_merge_scenario(
         &matchings_left_right,
     )
     .map_err(ExecutionError::MergeError)?;
+    log::info!("Finished merge of the trees");
 
     match result.has_conflict() {
         true => Ok(ExecutionResult::WithConflicts(result.to_string())),

bin/src/main.rs

@@ -6,9 +6,11 @@ mod language;
 use clap::Parser;
 
 fn main() {
-    env_logger::init();
-
     let args = cli_args::CliArgs::parse();
+    env_logger::builder().filter_level(args.log_level.unwrap_or(log::LevelFilter::Info)).init();
+
+    log::info!("Starting Generic Merge tool execution");
+    log::debug!("Parsed arguments: {:?}", args);
 
     let base = std::fs::read_to_string(&args.base_path).unwrap_or_else(|error| {
         log::error!("Error while reading base file: {}", error);