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search: add -b/--byte-offset flag

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This commit adds support for printing 0-based byte offset before each
line. We handle corner cases such as `-o/--only-matching` and
`-C/--context` as well.

Closes #812
This commit is contained in:
Balaji Sivaraman
2018-02-21 22:16:45 +05:30
committed by Andrew Gallant
parent 91d0756f62
commit b006943c01
8 changed files with 176 additions and 17 deletions
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13
src/app.rs
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@ -509,6 +509,7 @@ pub fn all_args_and_flags() -> Vec<RGArg> {
// Flags can be defined in any order, but we do it alphabetically.
flag_after_context(&mut args);
flag_before_context(&mut args);
flag_byte_offset(&mut args);
flag_case_sensitive(&mut args);
flag_color(&mut args);
flag_colors(&mut args);
@ -634,6 +635,18 @@ This overrides the --context flag.
args.push(arg);
}
fn flag_byte_offset(args: &mut Vec<RGArg>) {
const SHORT: &str = "Print the 0-based byte offset for each matching line.";
const LONG: &str = long!("\
Print the 0-based byte offset within the input file
before each line of output. If -o (--only-matching) is
specified, print the offset of the matching part itself.
");
let arg = RGArg::switch("byte-offset").short("b")
.help(SHORT).long_help(LONG);
args.push(arg);
}
fn flag_case_sensitive(args: &mut Vec<RGArg>) {
const SHORT: &str = "Search case sensitively (default).";
const LONG: &str = long!("\