search: add support for searching compressed files

This commit adds opt-in support for searching compressed files during
recursive search. This behavior is only enabled when the
`-z/--search-zip` flag is passed to ripgrep. When enabled, a limited set
of common compression formats are recognized via file extension, and a
new process is spawned to perform the decompression. ripgrep then
searches the stdout of that spawned process.

Closes #539

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 924a2397..6a250fa0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -49,6 +49,7 @@ num_cpus = "1"
 regex = "0.2.4"
 same-file = "1"
 termcolor = { version = "0.3.3", path = "termcolor" }
+globset = { version = "0.2.1", path = "globset" }
 
 [build-dependencies]
 clap = "2.26"