src/lib.rs

@@ -39,7 +39,7 @@ pub fn skip(cli: &Cli, writer: &mut impl Write) -> Result<()> {
         None => Box::new(BufReader::new(std::io::stdin())),
     };
     if let Some(line) = &cli.line {
-        skip_lines_matching(cli, reader, writer, line)
+        skip_lines_matching(&cli, reader, writer, line)
     } else if let Some(ref token) = cli.token {
         skip_tokens(cli, reader, writer, token)
     } else {
@@ -49,9 +49,13 @@ pub fn skip(cli: &Cli, writer: &mut impl Write) -> Result<()> {
 
 // skip a number of lines
 fn skip_lines(cli: &Cli, reader: Box<dyn BufRead>, writer: &mut impl Write) -> Result<()> {
-    for (counter, current_line) in reader.lines().map_while(Option::Some).flatten().enumerate() {
-        if counter >= cli.lines {
-            writeln!(writer, "{}", current_line)?;
+    let mut counter = 0usize;
+    for current_line in reader.lines() {
+        if let Ok(current_line) = current_line {
+            if counter >= cli.lines {
+                writeln!(writer, "{}", current_line)?;
+            }
+            counter += 1;
         }
     }
     Ok(())
@@ -65,12 +69,14 @@ fn skip_lines_matching(
     line: &str,
 ) -> Result<()> {
     let mut counter = 0usize;
-    for current_line in reader.lines().map_while(Option::Some).flatten() {
-        if counter >= cli.lines {
-            writeln!(writer, "{}", current_line)?;
-        }
-        if line == current_line {
-            counter += 1;
+    for current_line in reader.lines() {
+        if let Ok(current_line) = current_line {
+            if counter >= cli.lines {
+                writeln!(writer, "{}", current_line)?;
+            }
+            if line == current_line {
+                counter += 1;
+            }
         }
     }
     Ok(())
@@ -86,16 +92,18 @@ fn skip_tokens(
 ) -> Result<()> {
     let mut counter = 0usize;
 
-    for current_line in reader.lines().map_while(Option::Some).flatten() {
-        if counter >= cli.lines {
-            writeln!(writer, "{}", current_line)?;
-        }
-        if current_line.contains(token) {
-            if cli.ignore_extras {
-                counter += 1;
-            } else {
-                let occurances = current_line.matches(&token).count();
-                counter += occurances;
+    for current_line in reader.lines() {
+        if let Ok(current_line) = current_line {
+            if counter >= cli.lines {
+                writeln!(writer, "{}", current_line)?;
+            }
+            if current_line.contains(&token) {
+                if cli.ignore_extras {
+                    counter += 1;
+                } else {
+                    let occurances = current_line.matches(&token).count();
+                    counter += occurances;
+                }
             }
         }
     }
@@ -143,7 +151,10 @@ mod tests {
         skip(&cli, &mut lines)?;
 
         //then
-        assert_eq!(String::from_utf8(lines)?, ["alpha", "gamma\n"].join("\n"));
+        assert_eq!(
+            String::from_utf8(lines)?,
+            vec!["alpha", "gamma\n"].join("\n")
+        );
         Ok(())
     }
 
@@ -185,7 +196,7 @@ mod tests {
         //then
         assert_eq!(
             String::from_utf8(lines)?,
-            [
+            vec![
                 "Or help one fainting robin",
                 "Unto his nest again,",
                 "I shall not live in vain.\n"
@@ -213,7 +224,7 @@ mod tests {
         //then
         assert_eq!(
             String::from_utf8(lines)?,
-            [
+            vec![
                 //Lorem ipsum dolor sit amet,        -- +2 = 2
                 //consectetur adipiscing elit,
                 //sed do eiusmod tempor incididunt   -- +1 = 3
@@ -246,7 +257,7 @@ mod tests {
         //then
         assert_eq!(
             String::from_utf8(lines)?,
-            [
+            vec![
                 //Lorem ipsum dolor sit amet,        -- 1
                 //consectetur adipiscing elit,
                 //sed do eiusmod tempor incididunt   -- 2

test.sh

@@ -6,7 +6,7 @@ SKIP="./target/debug/skip"
 DIFF="diff -u --color"
 
 if test ! -x $SKIP ; then
-    echo "File missing: $SKIP - try 'cargo build'"
+    echo "File missing: $SKIP - try 'zig build'"
     exit 1
 fi