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bat/tests/syntax-tests/source/Diff/82e7786e747b1fcfac1f963ae6415a22ec9caae1.diff
Benjamin Neff b6e729abeb Add Diff syntax highlight test
2020-10-08 12:50:09 +02:00

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diff --git a/CHANGELOG.md b/CHANGELOG.md
index ced88213..973eba9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
## Features
+
+- Add a new `--diff` option that can be used to only show lines surrounding
+ Git changes, i.e. added, removed or modified lines. The amount of additional
+ context can be controlled with `--diff-context=N`. See #23 and #940
+
## Bugfixes
## Other
## `bat` as a library
diff --git a/src/bin/bat/app.rs b/src/bin/bat/app.rs
index e5221455..f0f519ea 100644
--- a/src/bin/bat/app.rs
+++ b/src/bin/bat/app.rs
@@ -15,7 +15,7 @@ use console::Term;
use bat::{
assets::HighlightingAssets,
- config::Config,
+ config::{Config, VisibleLines},
error::*,
input::Input,
line_range::{HighlightedLineRanges, LineRange, LineRanges},
@@ -196,13 +196,23 @@ impl App {
}
})
.unwrap_or_else(|| String::from(HighlightingAssets::default_theme())),
- line_ranges: self
- .matches
- .values_of("line-range")
- .map(|vs| vs.map(LineRange::from).collect())
- .transpose()?
- .map(LineRanges::from)
- .unwrap_or_default(),
+ visible_lines: if self.matches.is_present("diff") {
+ VisibleLines::DiffContext(
+ self.matches
+ .value_of("diff-context")
+ .and_then(|t| t.parse().ok())
+ .unwrap_or(2),
+ )
+ } else {
+ VisibleLines::Ranges(
+ self.matches
+ .values_of("line-range")
+ .map(|vs| vs.map(LineRange::from).collect())
+ .transpose()?
+ .map(LineRanges::from)
+ .unwrap_or_default(),
+ )
+ },
style_components,
syntax_mapping,
pager: self.matches.value_of("pager"),
diff --git a/src/bin/bat/clap_app.rs b/src/bin/bat/clap_app.rs
index c7344991..85edefde 100644
--- a/src/bin/bat/clap_app.rs
+++ b/src/bin/bat/clap_app.rs
@@ -105,6 +105,34 @@ pub fn build_app(interactive_output: bool) -> ClapApp<'static, 'static> {
data to bat from STDIN when bat does not otherwise know \
the filename."),
)
+ .arg(
+ Arg::with_name("diff")
+ .long("diff")
+ .help("Only show lines that have been added/removed/modified.")
+ .long_help(
+ "Only show lines that have been added/removed/modified with respect \
+ to the Git index. Use --diff-context=N to control how much context you want to see.",
+ ),
+ )
+ .arg(
+ Arg::with_name("diff-context")
+ .long("diff-context")
+ .overrides_with("diff-context")
+ .takes_value(true)
+ .value_name("N")
+ .validator(
+ |n| {
+ n.parse::<usize>()
+ .map_err(|_| "must be a number")
+ .map(|_| ()) // Convert to Result<(), &str>
+ .map_err(|e| e.to_string())
+ }, // Convert to Result<(), String>
+ )
+ .hidden_short_help(true)
+ .long_help(
+ "Include N lines of context around added/removed/modified lines when using '--diff'.",
+ ),
+ )
.arg(
Arg::with_name("tabs")
.long("tabs")
@@ -339,6 +367,7 @@ pub fn build_app(interactive_output: bool) -> ClapApp<'static, 'static> {
.takes_value(true)
.number_of_values(1)
.value_name("N:M")
+ .conflicts_with("diff")
.help("Only print the lines from N to M.")
.long_help(
"Only print the specified range of lines for each file. \
diff --git a/src/config.rs b/src/config.rs
index d5df9910..3c24b77f 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -5,6 +5,32 @@ use crate::style::StyleComponents;
use crate::syntax_mapping::SyntaxMapping;
use crate::wrapping::WrappingMode;
+#[derive(Debug, Clone)]
+pub enum VisibleLines {
+ /// Show all lines which are included in the line ranges
+ Ranges(LineRanges),
+
+ #[cfg(feature = "git")]
+ /// Only show lines surrounding added/deleted/modified lines
+ DiffContext(usize),
+}
+
+impl VisibleLines {
+ pub fn diff_context(&self) -> bool {
+ match self {
+ Self::Ranges(_) => false,
+ #[cfg(feature = "git")]
+ Self::DiffContext(_) => true,
+ }
+ }
+}
+
+impl Default for VisibleLines {
+ fn default() -> Self {
+ VisibleLines::Ranges(LineRanges::default())
+ }
+}
+
#[derive(Debug, Clone, Default)]
pub struct Config<'a> {
/// The explicitly configured language, if any
@@ -39,8 +65,8 @@ pub struct Config<'a> {
#[cfg(feature = "paging")]
pub paging_mode: PagingMode,
- /// Specifies the lines that should be printed
- pub line_ranges: LineRanges,
+ /// Specifies which lines should be printed
+ pub visible_lines: VisibleLines,
/// The syntax highlighting theme
pub theme: String,
@@ -62,10 +88,7 @@ pub struct Config<'a> {
fn default_config_should_include_all_lines() {
use crate::line_range::RangeCheckResult;
- assert_eq!(
- Config::default().line_ranges.check(17),
- RangeCheckResult::InRange
- );
+ assert_eq!(LineRanges::default().check(17), RangeCheckResult::InRange);
}
#[test]
diff --git a/src/controller.rs b/src/controller.rs
index 09c6ec2a..f636d5fd 100644
--- a/src/controller.rs
+++ b/src/controller.rs
@@ -1,9 +1,13 @@
use std::io::{self, Write};
use crate::assets::HighlightingAssets;
-use crate::config::Config;
+use crate::config::{Config, VisibleLines};
+#[cfg(feature = "git")]
+use crate::diff::{get_git_diff, LineChanges};
use crate::error::*;
use crate::input::{Input, InputReader, OpenedInput};
+#[cfg(feature = "git")]
+use crate::line_range::LineRange;
use crate::line_range::{LineRanges, RangeCheckResult};
use crate::output::OutputType;
#[cfg(feature = "paging")]
@@ -68,6 +72,32 @@ impl<'b> Controller<'b> {
no_errors = false;
}
Ok(mut opened_input) => {
+ #[cfg(feature = "git")]
+ let line_changes = if self.config.visible_lines.diff_context()
+ || (!self.config.loop_through && self.config.style_components.changes())
+ {
+ if let crate::input::OpenedInputKind::OrdinaryFile(ref path) =
+ opened_input.kind
+ {
+ let diff = get_git_diff(path);
+
+ if self.config.visible_lines.diff_context()
+ && diff
+ .as_ref()
+ .map(|changes| changes.is_empty())
+ .unwrap_or(false)
+ {
+ continue;
+ }
+
+ diff
+ } else {
+ None
+ }
+ } else {
+ None
+ };
+
let mut printer: Box<dyn Printer> = if self.config.loop_through {
Box::new(SimplePrinter::new())
} else {
@@ -75,10 +105,18 @@ impl<'b> Controller<'b> {
&self.config,
&self.assets,
&mut opened_input,
+ #[cfg(feature = "git")]
+ &line_changes,
))
};
- let result = self.print_file(&mut *printer, writer, &mut opened_input);
+ let result = self.print_file(
+ &mut *printer,
+ writer,
+ &mut opened_input,
+ #[cfg(feature = "git")]
+ &line_changes,
+ );
if let Err(error) = result {
handle_error(&error);
@@ -96,13 +134,31 @@ impl<'b> Controller<'b> {
printer: &mut dyn Printer,
writer: &mut dyn Write,
input: &mut OpenedInput,
+ #[cfg(feature = "git")] line_changes: &Option<LineChanges>,
) -> Result<()> {
if !input.reader.first_line.is_empty() || self.config.style_components.header() {
printer.print_header(writer, input)?;
}
if !input.reader.first_line.is_empty() {
- self.print_file_ranges(printer, writer, &mut input.reader, &self.config.line_ranges)?;
+ let line_ranges = match self.config.visible_lines {
+ VisibleLines::Ranges(ref line_ranges) => line_ranges.clone(),
+ #[cfg(feature = "git")]
+ VisibleLines::DiffContext(context) => {
+ let mut line_ranges: Vec<LineRange> = vec![];
+
+ if let Some(line_changes) = line_changes {
+ for line in line_changes.keys() {
+ let line = *line as usize;
+ line_ranges.push(LineRange::new(line - context, line + context));
+ }
+ }
+
+ LineRanges::from(line_ranges)
+ }
+ };
+
+ self.print_file_ranges(printer, writer, &mut input.reader, &line_ranges)?;
}
printer.print_footer(writer, input)?;
diff --git a/src/pretty_printer.rs b/src/pretty_printer.rs
index 0c78ea90..13bd5dbc 100644
--- a/src/pretty_printer.rs
+++ b/src/pretty_printer.rs
@@ -6,7 +6,7 @@ use syntect::parsing::SyntaxReference;
use crate::{
assets::HighlightingAssets,
- config::Config,
+ config::{Config, VisibleLines},
controller::Controller,
error::Result,
input::Input,
@@ -205,7 +205,7 @@ impl<'a> PrettyPrinter<'a> {
/// Specify the lines that should be printed (default: all)
pub fn line_ranges(&mut self, ranges: LineRanges) -> &mut Self {
- self.config.line_ranges = ranges;
+ self.config.visible_lines = VisibleLines::Ranges(ranges);
self
}
diff --git a/src/printer.rs b/src/printer.rs
index 5eed437e..2b245cfd 100644
--- a/src/printer.rs
+++ b/src/printer.rs
@@ -24,7 +24,7 @@ use crate::config::Config;
use crate::decorations::LineChangesDecoration;
use crate::decorations::{Decoration, GridBorderDecoration, LineNumberDecoration};
#[cfg(feature = "git")]
-use crate::diff::{get_git_diff, LineChanges};
+use crate::diff::LineChanges;
use crate::error::*;
use crate::input::OpenedInput;
use crate::line_range::RangeCheckResult;
@@ -90,7 +90,7 @@ pub(crate) struct InteractivePrinter<'a> {
ansi_prefix_sgr: String,
content_type: Option<ContentType>,
#[cfg(feature = "git")]
- pub line_changes: Option<LineChanges>,
+ pub line_changes: &'a Option<LineChanges>,
highlighter: Option<HighlightLines<'a>>,
syntax_set: &'a SyntaxSet,
background_color_highlight: Option<Color>,
@@ -101,6 +101,7 @@ impl<'a> InteractivePrinter<'a> {
config: &'a Config,
assets: &'a HighlightingAssets,
input: &mut OpenedInput,
+ #[cfg(feature = "git")] line_changes: &'a Option<LineChanges>,
) -> Self {
let theme = assets.get_theme(&config.theme);
@@ -145,9 +146,6 @@ impl<'a> InteractivePrinter<'a> {
panel_width = 0;
}
- #[cfg(feature = "git")]
- let mut line_changes = None;
-
let highlighter = if input
.reader
.content_type
@@ -155,18 +153,6 @@ impl<'a> InteractivePrinter<'a> {
{
None
} else {
- // Get the Git modifications
- #[cfg(feature = "git")]
- {
- use crate::input::OpenedInputKind;
-
- if config.style_components.changes() {
- if let OpenedInputKind::OrdinaryFile(ref path) = input.kind {
- line_changes = get_git_diff(path);
- }
- }
- }
-
// Determine the type of syntax for highlighting
let syntax = assets.get_syntax(config.language, input, &config.syntax_mapping);
Some(HighlightLines::new(syntax, theme))
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