feat: functionality to execute command on matched file

src/main.rs

@@ -1,3 +1,5 @@
+use std::{path::PathBuf, process::Command};
+
 use pest::Parser;
 use tag::{
     parsers::query::{construct_query_ast, evaluate_ast, QueryParser, Rule},
@@ -11,16 +13,20 @@ mod cli {
     #[command(author, version, about, long_about = None)]
     pub struct Cli {
         #[clap(value_name = "QUERY")]
-        /// Search query for the tags
+        /// Search query for the tags.
         pub query: String,
 
         #[clap(value_name = "PATH")]
-        /// The path that will be searched
+        /// The path that will be searched.
         pub path: String,
 
         #[arg(short, long)]
         /// Only print the paths of matched files.
         pub silent: bool,
+
+        #[arg(short, long)]
+        /// A command that will be executed on matched files.
+        pub command: String,
     }
 
     impl Cli {
@@ -30,13 +36,32 @@ mod cli {
     }
 }
 
+fn execute_command_on_file(path: PathBuf, command: String) -> String {
+    let command = command.replace("#FILE#", path.to_str().unwrap());
+
+    let output = Command::new("bash").arg("-c").arg(command.clone()).output();
+
+    if let Err(e) = &output {
+        println!("Wasn't able to execute command {}: {}", command, e);
+    }
+
+    let output = output.unwrap();
+    let output_string = std::str::from_utf8(output.stdout.as_slice());
+
+    if let Err(e) = &output_string {
+        println!("Failed to get output from command {}: {}", command, e);
+    }
+
+    output_string.unwrap().to_string()
+}
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let args = cli::Cli::new_and_parse();
 
     let file_index = get_tags_from_files(args.path.as_str())?;
     let query = QueryParser::parse(Rule::tagsearch, args.query.as_str());
 
-    if let Err(e) = query {
+    if let Err(e) = &query {
         println!("Error: {}", e);
         std::process::exit(1);
     }
@@ -55,8 +80,14 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
         println!("{}", file.path.display());
 
+        let mut output = String::new();
+        if !args.command.is_empty() {
+            output = execute_command_on_file(file.path.clone(), args.command.clone());
+        }
+
         if !args.silent {
             println!("\ttags:{:?} ", file.tags);
+            println!("\tOutput of command:\n{}", output);
         }
     }