Implemented --file-name for multiple files + tests

src/bin/bat/app.rs

@@ -137,6 +137,12 @@ impl App {
             }
         });
 
+        if self.matches.value_of("file-name").is_some()
+            && self.matches.values_of("file-name").unwrap().len() != files.len()
+        {
+            return Err("When using --file-name, each input file must have a corresponding --file-name specified.".into());
+        }
+
         Ok(Config {
             true_color: is_truecolor_terminal(),
             language: self.matches.value_of("language").or_else(|| {
@@ -222,7 +228,10 @@ impl App {
                     .transpose()?
                     .unwrap_or_else(|| vec![LineRange { lower: 0, upper: 0 }]),
             ),
-            filename: self.matches.value_of("file-name").or_else(|| None),
+            filenames: self
+                .matches
+                .values_of("file-name")
+                .map(|values| values.collect()),
         })
     }
 

src/controller.rs

@@ -41,7 +41,20 @@ impl<'b> Controller<'b> {
 
         let stdin = io::stdin();
 
-        for input_file in &self.config.files {
+        let filenames = if self.config.filenames.is_none() {
+            vec![None; self.config.files.len()]
+        } else {
+            self.config
+                .filenames
+                .as_ref()
+                .unwrap()
+                .into_iter()
+                .map(|name| Some(*name))
+                .collect()
+        };
+
+        for it in self.config.files.iter().zip(filenames) {
+            let (input_file, file_name) = it;
             match input_file.get_reader(&stdin) {
                 Err(error) => {
                     handle_error(&error);
@@ -50,7 +63,7 @@ impl<'b> Controller<'b> {
                 Ok(mut reader) => {
                     let result = if self.config.loop_through {
                         let mut printer = SimplePrinter::new();
-                        self.print_file(reader, &mut printer, writer, *input_file)
+                        self.print_file(reader, &mut printer, writer, *input_file, file_name)
                     } else {
                         let mut printer = InteractivePrinter::new(
                             &self.config,
@@ -58,7 +71,7 @@ impl<'b> Controller<'b> {
                             *input_file,
                             &mut reader,
                         );
-                        self.print_file(reader, &mut printer, writer, *input_file)
+                        self.print_file(reader, &mut printer, writer, *input_file, file_name)
                     };
 
                     if let Err(error) = result {
@@ -78,9 +91,10 @@ impl<'b> Controller<'b> {
         printer: &mut P,
         writer: &mut dyn Write,
         input_file: InputFile<'a>,
+        file_name: Option<&str>,
     ) -> Result<()> {
         if !reader.first_line.is_empty() || self.config.output_components.header() {
-            printer.print_header(writer, input_file)?;
+            printer.print_header(writer, input_file, file_name)?;
         }
 
         if !reader.first_line.is_empty() {

src/lib.rs

@@ -131,5 +131,5 @@ pub struct Config<'a> {
     pub highlight_lines: LineRanges,
 
     /// Name of file to display when printing
-    pub filename: Option<&'a str>,
+    pub filenames: Option<Vec<&'a str>>,
 }

src/printer.rs

@@ -34,7 +34,12 @@ use crate::terminal::{as_terminal_escaped, to_ansi_color};
 use crate::Config;
 
 pub trait Printer {
-    fn print_header(&mut self, handle: &mut dyn Write, file: InputFile) -> Result<()>;
+    fn print_header(
+        &mut self,
+        handle: &mut dyn Write,
+        file: InputFile,
+        file_name: Option<&str>,
+    ) -> Result<()>;
     fn print_footer(&mut self, handle: &mut dyn Write) -> Result<()>;
 
     fn print_snip(&mut self, handle: &mut dyn Write) -> Result<()>;
@@ -57,7 +62,12 @@ impl SimplePrinter {
 }
 
 impl Printer for SimplePrinter {
-    fn print_header(&mut self, _handle: &mut dyn Write, _file: InputFile) -> Result<()> {
+    fn print_header(
+        &mut self,
+        _handle: &mut dyn Write,
+        _file: InputFile,
+        _file_name: Option<&str>,
+    ) -> Result<()> {
         Ok(())
     }
 
@@ -224,15 +234,20 @@ impl<'a> InteractivePrinter<'a> {
 }
 
 impl<'a> Printer for InteractivePrinter<'a> {
-    fn print_header(&mut self, handle: &mut dyn Write, file: InputFile) -> Result<()> {
+    fn print_header(
+        &mut self,
+        handle: &mut dyn Write,
+        file: InputFile,
+        file_name: Option<&str>,
+    ) -> Result<()> {
         if !self.config.output_components.header() {
             if Some(ContentType::BINARY) == self.content_type && !self.config.show_nonprintable {
                 let input = match file {
                     InputFile::Ordinary(filename) => format!(
                         "file '{}'",
-                        self.config.filename.unwrap_or(&filename.to_string_lossy())
+                        file_name.unwrap_or(&filename.to_string_lossy())
                     ),
-                    _ => self.config.filename.unwrap_or("STDIN").to_owned(),
+                    _ => file_name.unwrap_or("STDIN").to_owned(),
                 };
 
                 writeln!(
@@ -269,17 +284,9 @@ impl<'a> Printer for InteractivePrinter<'a> {
         let (prefix, name) = match file {
             InputFile::Ordinary(filename) => (
                 "File: ",
-                Cow::from(
+                Cow::from(file_name.unwrap_or(&filename.to_string_lossy()).to_owned()),
-                    self.config
-                        .filename
-                        .unwrap_or(&filename.to_string_lossy())
-                        .to_owned(),
-                ),
-            ),
-            _ => (
-                "File: ",
-                Cow::from(self.config.filename.unwrap_or("STDIN").to_owned()),
             ),
+            _ => ("File: ", Cow::from(file_name.unwrap_or("STDIN").to_owned())),
         };
 
         let mode = match self.content_type {

tests/integration_tests.rs

@@ -598,3 +598,32 @@ fn filename_stdin_binary() {
         .stdout("File: foo   <BINARY>\n")
         .stderr("");
 }
+
+#[test]
+fn filename_multiple_ok() {
+    bat()
+        .arg("--decorations=always")
+        .arg("--style=header")
+        .arg("-r=0:0")
+        .arg("test.txt")
+        .arg("--file-name=foo")
+        .arg("single-line.txt")
+        .arg("--file-name=bar")
+        .assert()
+        .success()
+        .stdout("File: foo\nFile: bar\n")
+        .stderr("");
+}
+
+#[test]
+fn filename_multiple_err() {
+    bat()
+        .arg("--decorations=always")
+        .arg("--style=header")
+        .arg("-r=0:0")
+        .arg("test.txt")
+        .arg("--file-name=foo")
+        .arg("single-line.txt")
+        .assert()
+        .failure();
+}