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Implement --tabsize option

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This commit is contained in:
Olivier Tilloy
2024-03-05 18:52:04 +01:00
parent 8d65c2badd
commit e0283083f2
9 changed files with 207 additions and 40 deletions
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src/normal_diff.rs
+18 -12
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@@ -116,7 +116,13 @@ fn make_diff(expected: &[u8], actual: &[u8], stop_early: bool) -> Vec<Mismatch>
}
#[must_use]
pub fn diff(expected: &[u8], actual: &[u8], stop_early: bool, expand_tabs: bool) -> Vec<u8> {
pub fn diff(
expected: &[u8],
actual: &[u8],
stop_early: bool,
expand_tabs: bool,
tabsize: usize,
) -> Vec<u8> {
// See https://www.gnu.org/software/diffutils/manual/html_node/Detailed-Normal.html
// for details on the syntax of the normal format.
let mut output = Vec::new();
@@ -190,7 +196,7 @@ pub fn diff(expected: &[u8], actual: &[u8], stop_early: bool, expand_tabs: bool)
}
for expected in &result.expected {
write!(&mut output, "< ").unwrap();
do_write_line(&mut output, expected, expand_tabs).unwrap();
do_write_line(&mut output, expected, expand_tabs, tabsize).unwrap();
writeln!(&mut output).unwrap();
}
if result.expected_missing_nl {
@@ -201,7 +207,7 @@ pub fn diff(expected: &[u8], actual: &[u8], stop_early: bool, expand_tabs: bool)
}
for actual in &result.actual {
write!(&mut output, "> ").unwrap();
do_write_line(&mut output, actual, expand_tabs).unwrap();
do_write_line(&mut output, actual, expand_tabs, tabsize).unwrap();
writeln!(&mut output).unwrap();
}
if result.actual_missing_nl {
@@ -222,7 +228,7 @@ mod tests {
a.write_all(b"a\n").unwrap();
let mut b = Vec::new();
b.write_all(b"b\n").unwrap();
let diff = diff(&a, &b, false, false);
let diff = diff(&a, &b, false, false, 8);
let expected = b"1c1\n< a\n---\n> b\n".to_vec();
assert_eq!(diff, expected);
}
@@ -275,7 +281,7 @@ mod tests {
}
// This test diff is intentionally reversed.
// We want it to turn the alef into bet.
let diff = diff(&alef, &bet, false, false);
let diff = diff(&alef, &bet, false, false, 8);
File::create(&format!("{target}/ab.diff"))
.unwrap()
.write_all(&diff)
@@ -367,7 +373,7 @@ mod tests {
}
// This test diff is intentionally reversed.
// We want it to turn the alef into bet.
let diff = diff(&alef, &bet, false, false);
let diff = diff(&alef, &bet, false, false, 8);
File::create(&format!("{target}/abn.diff"))
.unwrap()
.write_all(&diff)
@@ -441,7 +447,7 @@ mod tests {
}
// This test diff is intentionally reversed.
// We want it to turn the alef into bet.
let diff = diff(&alef, &bet, false, false);
let diff = diff(&alef, &bet, false, false, 8);
File::create(&format!("{target}/ab_.diff"))
.unwrap()
.write_all(&diff)
@@ -519,7 +525,7 @@ mod tests {
}
// This test diff is intentionally reversed.
// We want it to turn the alef into bet.
let diff = diff(&alef, &bet, false, false);
let diff = diff(&alef, &bet, false, false, 8);
File::create(&format!("{target}/abr.diff"))
.unwrap()
.write_all(&diff)
@@ -554,18 +560,18 @@ mod tests {
let from = ["a", "b", "c"].join("\n");
let to = ["a", "d", "c"].join("\n");
let diff_full = diff(from.as_bytes(), to.as_bytes(), false, false);
let diff_full = diff(from.as_bytes(), to.as_bytes(), false, false, 8);
let expected_full = ["2c2", "< b", "---", "> d", ""].join("\n");
assert_eq!(diff_full, expected_full.as_bytes());
let diff_brief = diff(from.as_bytes(), to.as_bytes(), true, false);
let diff_brief = diff(from.as_bytes(), to.as_bytes(), true, false, 8);
let expected_brief = "\0".as_bytes();
assert_eq!(diff_brief, expected_brief);
let nodiff_full = diff(from.as_bytes(), from.as_bytes(), false, false);
let nodiff_full = diff(from.as_bytes(), from.as_bytes(), false, false, 8);
assert!(nodiff_full.is_empty());
let nodiff_brief = diff(from.as_bytes(), from.as_bytes(), true, false);
let nodiff_brief = diff(from.as_bytes(), from.as_bytes(), true, false, 8);
assert!(nodiff_brief.is_empty());
}
}