Add option to download packages by name regex

This patch adds a feature so that we can download sources for all packages
matching a regex.

For example

    butido source download --matching "perl5.34.0-.*"

for downloading all packages where their name matches "perl5.34.0-.*".

Signed-off-by: Matthias Beyer <matthias.beyer@atos.net>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/cli.rs b/src/cli.rs
index 0da6745..2f58a6d 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -841,6 +841,20 @@ pub fn cli<'a>() -> App<'a> {
                     .long("force")
                     .about("Overwrite existing cache entry")
                 )
+
+                .arg(Arg::new("matching")
+                    .required(false)
+                    .multiple(false)
+                    .long("matching")
+                    .takes_value(true)
+                    .value_name("REGEX")
+                    .about("Download all packages matching a regex with their name")
+                )
+
+                .group(ArgGroup::new("download-one-or-many")
+                    .args(&["package_name", "matching"])
+                    .required(true)
+                )
             )
             .subcommand(App::new("of")
                 .version(crate_version!())