Make `add` accept list of files

This adds the possibility to add multiple files at once and fixes #4

src/app.rs

@@ -65,7 +65,7 @@ pub enum Command {
     /// Add a line to the gitignore
     Add {
         /// The glob string that should be added
-        glob:  String,
+        glob:  Vec<String>,
         /// Add the entry to the repo local ignore file
         #[structopt(short)]
         local: bool,
@@ -90,7 +90,13 @@ pub enum Command {
 }
 
 /// Runs the command `add`
-fn run_add(glob: &str, local: bool) -> Result<()> {
+fn run_add(glob: Vec<String>, local: bool) -> Result<()> {
+    for g in glob {
+        add(&g, local)?;
+    }
+    Ok(())
+}
+fn add(glob: &str, local: bool) -> Result<()> {
     trace!("running command `add` with glob '{}'", &glob);
     let root = match git_dir()? {
         Some(r) => r,
@@ -165,7 +171,7 @@ fn run_dump_completion(shell: Option<structopt::clap::Shell>) -> Result<()> {
 /// The actual `main()`
 pub fn main(opts: CliOpts) -> Result<()> {
     match opts.cmd {
-        Command::Add { glob, local } => run_add(&glob, local)?,
+        Command::Add { glob, local } => run_add(glob, local)?,
         Command::Get { lang, append } => run_get(&lang, append)?,
         Command::ListTemplates => run_list_templates()?,
         Command::DumpCompletions { shell } => run_dump_completion(shell)?,