refactor(cli): Centralize reading of verbose

src/bin/cargo/cli.rs

@@ -112,7 +112,7 @@ Run with 'cargo -Z [FLAG] [SUBCOMMAND]'",
         return Ok(());
     }
 
-    let is_verbose = expanded_args.occurrences_of("verbose") > 0;
+    let is_verbose = expanded_args.verbose() > 0;
     if expanded_args.is_present("version") {
         let version = get_version_string(is_verbose);
         drop_print!(config, "{}", version);
@@ -331,7 +331,7 @@ fn config_configure(
         ._is_valid_arg("target-dir")
         .then(|| subcommand_args.value_of_path("target-dir", config))
         .flatten();
-    let verbose = global_args.verbose + args.occurrences_of("verbose") as u32;
+    let verbose = global_args.verbose + args.verbose();
     // quiet is unusual because it is redefined in some subcommands in order
     // to provide custom help text.
     let quiet = args.is_present("quiet")
@@ -389,7 +389,7 @@ struct GlobalArgs {
 impl GlobalArgs {
     fn new(args: &ArgMatches) -> GlobalArgs {
         GlobalArgs {
-            verbose: args.occurrences_of("verbose") as u32,
+            verbose: args.verbose(),
             quiet: args.is_present("quiet"),
             color: args.value_of("color").map(|s| s.to_string()),
             frozen: args.is_present("frozen"),

src/bin/cargo/commands/tree.rs

@@ -104,7 +104,7 @@ pub fn cli() -> App {
 
 pub fn exec(config: &mut Config, args: &ArgMatches) -> CliResult {
     if args.is_present("version") {
-        let verbose = args.occurrences_of("verbose") > 0;
+        let verbose = args.verbose() > 0;
         let version = cli::get_version_string(verbose);
         cargo::drop_print!(config, "{}", version);
         return Ok(());

src/bin/cargo/commands/version.rs

@@ -9,7 +9,7 @@ pub fn cli() -> App {
 }
 
 pub fn exec(config: &mut Config, args: &ArgMatches) -> CliResult {
-    let verbose = args.occurrences_of("verbose") > 0;
+    let verbose = args.verbose() > 0;
     let version = cli::get_version_string(verbose);
     cargo::drop_print!(config, "{}", version);
     Ok(())

src/cargo/util/command_prelude.rs

@@ -360,6 +360,10 @@ pub trait ArgMatchesExt {
         self.value_of_u32("jobs")
     }
 
+    fn verbose(&self) -> u32 {
+        self._occurrences("verbose")
+    }
+
     fn keep_going(&self) -> bool {
         self._is_present("keep-going")
     }
@@ -729,6 +733,8 @@ pub trait ArgMatchesExt {
 
     fn _values_of_os(&self, name: &str) -> Vec<OsString>;
 
+    fn _occurrences(&self, name: &str) -> u32;
+
     fn _is_present(&self, name: &str) -> bool;
 
     fn _is_valid_arg(&self, name: &str) -> bool;
@@ -757,6 +763,10 @@ impl<'a> ArgMatchesExt for ArgMatches {
             .collect()
     }
 
+    fn _occurrences(&self, name: &str) -> u32 {
+        self.occurrences_of(name) as u32
+    }
+
     fn _is_present(&self, name: &str) -> bool {
         self.is_present(name)
     }