73 lines
2.5 KiB
Rust
73 lines
2.5 KiB
Rust
use std::{collections::HashMap, env, process::Command};
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/// Returns a QEMU runner target given an architecture.
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fn get_qemu_target(arch: &str) -> &str {
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match arch {
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"armv7" => "arm",
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"i686" => "i386",
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"powerpc" => "ppc",
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"powerpc64le" => "ppc64le",
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_ => arch,
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}
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}
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/// This is required since running binary tests via cross can cause be tricky! We need to basically "magically" grab
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/// the correct runner in some cases, which can be done by inspecting env variables that should only show up while
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/// using cross.
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///
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/// Originally inspired by [ripgrep's test files](https://cs.github.com/BurntSushi/ripgrep/blob/9f0e88bcb14e02da1b88872435b17d74786640b5/tests/util.rs#L470),
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/// but adapted to work more generally with the architectures supported by bottom after looking through cross'
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/// [linux-runner](https://github.com/cross-rs/cross/blob/main/docker/linux-runner) file.
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fn cross_runner() -> Option<String> {
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const TARGET_RUNNER: &str = "CARGO_TARGET_RUNNER";
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const CROSS_RUNNER: &str = "CROSS_RUNNER";
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let env_mapping = std::env::vars_os()
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.filter_map(|(k, v)| {
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let (k, v) = (k.to_string_lossy(), v.to_string_lossy());
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if k.starts_with("CARGO_TARGET_") && k.ends_with("_RUNNER") && !v.is_empty() {
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Some((TARGET_RUNNER.to_string(), v.to_string()))
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} else if k == CROSS_RUNNER && !v.is_empty() {
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Some((k.to_string(), v.to_string()))
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} else {
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None
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}
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})
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.collect::<HashMap<_, _>>();
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if let Some(cross_runner) = env_mapping.get(CROSS_RUNNER) {
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if cross_runner == "qemu-user" {
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env_mapping.get(TARGET_RUNNER).map(|target_runner| {
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format!(
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"qemu-{}",
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get_qemu_target(
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target_runner
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.split_ascii_whitespace()
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.collect::<Vec<_>>()
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.last()
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.unwrap()
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)
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)
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})
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} else {
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None
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}
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} else {
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env_mapping.get(TARGET_RUNNER).cloned()
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}
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}
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/// Returns the [`Command`] of a binary invocation of bottom.
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pub fn btm_command() -> Command {
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let btm_exe = env!("CARGO_BIN_EXE_btm");
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match cross_runner() {
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None => Command::new(btm_exe),
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Some(runner) => {
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let mut cmd = Command::new(runner);
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cmd.arg(btm_exe);
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cmd
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}
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}
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}
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