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

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

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/tests.rs b/tests/tests.rs
index 6becfe0f..7ae23895 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -395,6 +395,16 @@ sherlock!(csglob, "Sherlock", ".", |wd: WorkDir, mut cmd: Command| {
     assert_eq!(lines, "file2.html:Sherlock\n");
 });
 
+sherlock!(byte_offset_only_matching, "Sherlock", ".", |wd: WorkDir, mut cmd: Command| {
+    cmd.arg("-b").arg("-o");
+    let lines: String = wd.stdout(&mut cmd);
+    let expected = "\
+sherlock:56:Sherlock
+sherlock:177:Sherlock
+";
+    assert_eq!(lines, expected);
+});
+
 sherlock!(count, "Sherlock", ".", |wd: WorkDir, mut cmd: Command| {
     cmd.arg("--count");
     let lines: String = wd.stdout(&mut cmd);