refactor(term.rs): moved term.rs into it's own crate so others can pu…

…ll in just that portion

The functionality can now be found in https://crates.io/crates/term_size

Closes #549

Cargo.toml

@@ -20,6 +20,7 @@ strsim    = { version = "~0.4.0",  optional = true }
 yaml-rust = { version = "~0.3.2",  optional = true }
 clippy    = { version = "~0.0.74", optional = true }
 unicode-width = { version = "~0.1.3",  optional = true }
+term_size = { version = "~0.1.0", optional = true }
 
 [dev-dependencies]
 regex = "~0.1.69"
@@ -29,7 +30,7 @@ default     = ["suggestions", "color", "wrap_help"]
 suggestions = ["strsim"]
 color       = ["ansi_term", "libc"]
 yaml        = ["yaml-rust"]
-wrap_help   = ["libc", "unicode-width"]
+wrap_help   = ["libc", "unicode-width", "term_size"]
 lints       = ["clippy", "nightly"]
 nightly     = [] # for building with nightly and unstable features
 unstable    = [] # for building with unstable features on stable Rust

src/app/help.rs

@@ -12,7 +12,14 @@ use app::{App, AppSettings};
 use app::parser::Parser;
 use fmt::{Format, Colorizer};
 
-use term;
+#[cfg(all(feature = "wrap_help", not(target_os = "windows")))]
+use term_size;
+#[cfg(any(not(feature = "wrap_help"), target_os = "windows"))]
+mod term_size {
+    pub fn dimensions() -> Option<(usize, usize)> {
+        None
+    }
+}
 
 #[cfg(all(feature = "wrap_help", not(target_os = "windows")))]
 use unicode_width::UnicodeWidthStr;
@@ -96,7 +103,7 @@ impl<'a> Help<'a> {
             hide_pv: hide_pv,
             term_w: match term_w {
                 Some(width) => width,
-                None        => term::dimensions().map(|(w, _)| w).unwrap_or(120),
+                None        => term_size::dimensions().map(|(w, _)| w).unwrap_or(120),
             },
             color: color,
             cizer: cizer,

src/lib.rs

@@ -414,6 +414,8 @@ extern crate unicode_width;
 #[macro_use]
 extern crate bitflags;
 extern crate vec_map;
+#[cfg(feature = "wrap_help")]
+extern crate term_size;
 
 #[cfg(feature = "yaml")]
 pub use yaml_rust::YamlLoader;
@@ -431,7 +433,6 @@ mod fmt;
 mod suggestions;
 mod errors;
 mod osstringext;
-mod term;
 mod strext;
 
 const INTERNAL_ERROR_MSG: &'static str = "Fatal internal error. Please consider filing a bug \