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Color output of cargo if TTY

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David Tolnay 2016-06-05 15:15:00 -07:00
parent 0ee62f0689
commit 7eb5cfc63b
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GPG key ID: F9BA143B95FF6D82
3 changed files with 52 additions and 1 deletions
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37
Cargo.lock generated
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@ -1,4 +1,41 @@
[root]
name = "cargo-expand"
version = "0.1.0"
dependencies = [
"isatty 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "isatty"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "kernel32-sys"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"winapi 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "libc"
version = "0.2.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "winapi"
version = "0.2.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "winapi-build"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"

3
Cargo.toml
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@ -7,3 +7,6 @@ description = "Wrapper around rustc --pretty=expanded"
repository = "https://github.com/dtolnay/cargo-expand"
documentation = "https://github.com/dtolnay/cargo-expand"
keywords = ["cargo", "subcommand", "expanded"]
[dependencies]
isatty = "0.1"

13
src/main.rs
View file

@ -2,6 +2,9 @@ use std::env;
use std::io::{self, Write};
use std::process::{self, Command, Stdio};
extern crate isatty;
use isatty::{stdout_isatty, stderr_isatty};
fn main() {
// Build cargo command
let mut cargo = Command::new("cargo");
@ -56,14 +59,22 @@ fn wrap_args<T, I>(it: I) -> Vec<String>
I: IntoIterator<Item=T>
{
let mut args = vec!["rustc".to_string()];
let mut has_color = false;
let mut has_double_hyphen = false;
for arg in it.into_iter().skip(2) {
let arg = arg.as_ref().to_string();
has_double_hyphen |= &arg == "--";
has_color |= arg.starts_with("--color");
has_double_hyphen |= arg == "--";
args.push(arg);
}
if !has_color {
let color = stdout_isatty() && stderr_isatty();
let setting = if color { "always" } else { "never" };
args.push(format!("--color={}", setting));
}
if !has_double_hyphen {
args.push("--".to_string());
}