Add build feature to disable command execution

This CL adds the build feature `disable-command-execution` that enforces the `--print` flag and thereby disables execution of commands.

Cargo.toml

@@ -11,6 +11,9 @@ keywords = ["cheatsheets", "terminal", "cli", "tui", "shell"]
 categories = ["command-line-utilities"]
 license = "Apache-2.0"
 
+[features]
+disable-command-execution = []
+
 [badges]
 travis-ci = { repository = "denisidoro/navi", branch = "master" }
 

src/config/cli.rs

@@ -97,6 +97,7 @@ pub(super) struct ClapConfig {
 
     /// Instead of executing a snippet, prints it to stdout
     #[clap(long)]
+    #[cfg(not(feature = "disable-command-execution"))]
     pub print: bool,
 
     /// Returns the best match

src/config/mod.rs

@@ -136,8 +136,18 @@ impl Config {
         self.yaml.style.comment.min_width
     }
 
+    #[cfg(feature = "disable-command-execution")]
+    fn print(&self) -> bool {
+        true
+    }
+
+    #[cfg(not(feature = "disable-command-execution"))]
+    fn print(&self) -> bool {
+        self.clap.print
+    }
+
     pub fn action(&self) -> Action {
-        if self.clap.print {
+        if self.print() {
             Action::Print
         } else {
             Action::Execute