use process_control::{ChildExt, Timeout}; use std::fs::File; use std::io::{Read, Result}; use std::path::Path; use std::process::{Command, Stdio}; use std::time::{Duration, Instant}; use crate::context::Shell; /// Return the string contents of a file pub fn read_file>(file_name: P) -> Result { let mut file = File::open(file_name)?; let mut data = String::new(); file.read_to_string(&mut data)?; Ok(data) } #[derive(Debug)] pub struct CommandOutput { pub stdout: String, pub stderr: String, } impl PartialEq for CommandOutput { fn eq(&self, other: &Self) -> bool { self.stdout == other.stdout && self.stderr == other.stderr } } /// Execute a command and return the output on stdout and stderr if successful #[cfg(not(test))] pub fn exec_cmd(cmd: &str, args: &[&str]) -> Option { internal_exec_cmd(&cmd, &args) } #[cfg(test)] pub fn exec_cmd(cmd: &str, args: &[&str]) -> Option { let command = match args.len() { 0 => String::from(cmd), _ => format!("{} {}", cmd, args.join(" ")), }; match command.as_str() { "crystal --version" => Some(CommandOutput { stdout: String::from( "\ Crystal 0.35.1 (2020-06-19) LLVM: 10.0.0 Default target: x86_64-apple-macosx\n", ), stderr: String::default(), }), "dart --version" => Some(CommandOutput { stdout: String::default(), stderr: String::from( "Dart VM version: 2.8.4 (stable) (Wed Jun 3 12:26:04 2020 +0200) on \"macos_x64\"", ), }), "dummy_command" => Some(CommandOutput { stdout: String::from("stdout ok!\n"), stderr: String::from("stderr ok!\n"), }), "elixir --version" => Some(CommandOutput { stdout: String::from( "\ Erlang/OTP 22 [erts-10.6.4] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe] Elixir 1.10 (compiled with Erlang/OTP 22)\n", ), stderr: String::default(), }), "elm --version" => Some(CommandOutput { stdout: String::from("0.19.1\n"), stderr: String::default(), }), "go version" => Some(CommandOutput { stdout: String::from("go version go1.12.1 linux/amd64\n"), stderr: String::default(), }), "helm version --short --client" => Some(CommandOutput { stdout: String::from("v3.1.1+gafe7058\n"), stderr: String::default(), }), s if s.ends_with("java -Xinternalversion") => Some(CommandOutput { stdout: String::from("OpenJDK 64-Bit Server VM (13.0.2+8) for bsd-amd64 JRE (13.0.2+8), built on Feb 6 2020 02:07:52 by \"brew\" with clang 4.2.1 Compatible Apple LLVM 11.0.0 (clang-1100.0.33.17)"), stderr: String::default(), }), "julia --version" => Some(CommandOutput { stdout: String::from("julia version 1.4.0\n"), stderr: String::default(), }), "kotlin -version" => Some(CommandOutput { stdout: String::from("Kotlin version 1.4.21-release-411 (JRE 14.0.1+7)\n"), stderr: String::default(), }), "kotlinc -version" => Some(CommandOutput { stdout: String::from("info: kotlinc-jvm 1.4.21 (JRE 14.0.1+7)\n"), stderr: String::default(), }), "lua -v" => Some(CommandOutput{ stdout: String::from("Lua 5.4.0 Copyright (C) 1994-2020 Lua.org, PUC-Rio\n"), stderr: String::default(), }), "luajit -v" => Some(CommandOutput{ stdout: String::from("LuaJIT 2.0.5 -- Copyright (C) 2005-2017 Mike Pall. http://luajit.org/\n"), stderr: String::default(), }), "nim --version" => Some(CommandOutput { stdout: String::from( "\ Nim Compiler Version 1.2.0 [Linux: amd64] Compiled at 2020-04-03 Copyright (c) 2006-2020 by Andreas Rumpf git hash: 7e83adff84be5d0c401a213eccb61e321a3fb1ff active boot switches: -d:release\n", ), stderr: String::default(), }), "node --version" => Some(CommandOutput { stdout: String::from("v12.0.0\n"), stderr: String::default(), }), "ocaml -vnum" => Some(CommandOutput { stdout: String::from("4.10.0\n"), stderr: String::default(), }), "esy ocaml -vnum" => Some(CommandOutput { stdout: String::from("4.08.1\n"), stderr: String::default(), }), "perl -e printf q#%vd#,$^V;" => Some(CommandOutput { stdout: String::from("5.26.1"), stderr: String::default(), }), "php -nr echo PHP_MAJOR_VERSION.\".\".PHP_MINOR_VERSION.\".\".PHP_RELEASE_VERSION;" => { Some(CommandOutput { stdout: String::from("7.3.8"), stderr: String::default(), }) } "purs --version" => Some(CommandOutput { stdout: String::from("0.13.5\n"), stderr: String::default(), }), "pyenv version-name" => Some(CommandOutput { stdout: String::from("system\n"), stderr: String::default(), }), "python --version" => None, "python2 --version" => Some(CommandOutput { stdout: String::default(), stderr: String::from("Python 2.7.17\n"), }), "python3 --version" => Some(CommandOutput { stdout: String::from("Python 3.8.0\n"), stderr: String::default(), }), "ruby -v" => Some(CommandOutput { stdout: String::from("ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux-gnu]\n"), stderr: String::default(), }), "swift --version" => Some(CommandOutput { stdout: String::from( "\ Apple Swift version 5.2.2 (swiftlang-1103.0.32.6 clang-1103.0.32.51) Target: x86_64-apple-darwin19.4.0\n", ), stderr: String::default(), }), "vagrant --version" => Some(CommandOutput { stdout: String::from("Vagrant 2.2.10\n"), stderr: String::default(), }), "zig version" => Some(CommandOutput { stdout: String::from("0.6.0\n"), stderr: String::default(), }), "cmake --version" => Some(CommandOutput { stdout: String::from( "\ cmake version 3.17.3 CMake suite maintained and supported by Kitware (kitware.com/cmake).\n", ), stderr: String::default(), }), "dotnet --version" => Some(CommandOutput { stdout: String::from("3.1.103"), stderr: String::default(), }), "dotnet --list-sdks" => Some(CommandOutput { stdout: String::from("3.1.103 [/usr/share/dotnet/sdk]"), stderr: String::default(), }), "terraform version" => Some(CommandOutput { stdout: String::from("Terraform v0.12.14\n"), stderr: String::default(), }), s if s.starts_with("erl -noshell -eval") => Some(CommandOutput { stdout: String::from("22.1.3\n"), stderr: String::default(), }), // If we don't have a mocked command fall back to executing the command _ => internal_exec_cmd(&cmd, &args), } } /// Wraps ANSI color escape sequences in the shell-appropriate wrappers. pub fn wrap_colorseq_for_shell(ansi: String, shell: Shell) -> String { const ESCAPE_BEGIN: char = '\u{1b}'; const ESCAPE_END: char = 'm'; wrap_seq_for_shell(ansi, shell, ESCAPE_BEGIN, ESCAPE_END) } /// Many shells cannot deal with raw unprintable characters and miscompute the cursor position, /// leading to strange visual bugs like duplicated/missing chars. This function wraps a specified /// sequence in shell-specific escapes to avoid these problems. pub fn wrap_seq_for_shell( ansi: String, shell: Shell, escape_begin: char, escape_end: char, ) -> String { const BASH_BEG: &str = "\u{5c}\u{5b}"; // \[ const BASH_END: &str = "\u{5c}\u{5d}"; // \] const ZSH_BEG: &str = "\u{25}\u{7b}"; // %{ const ZSH_END: &str = "\u{25}\u{7d}"; // %} // ANSI escape codes cannot be nested, so we can keep track of whether we're // in an escape or not with a single boolean variable let mut escaped = false; let final_string: String = ansi .chars() .map(|x| { if x == escape_begin && !escaped { escaped = true; match shell { Shell::Bash => format!("{}{}", BASH_BEG, escape_begin), Shell::Zsh => format!("{}{}", ZSH_BEG, escape_begin), _ => x.to_string(), } } else if x == escape_end && escaped { escaped = false; match shell { Shell::Bash => format!("{}{}", escape_end, BASH_END), Shell::Zsh => format!("{}{}", escape_end, ZSH_END), _ => x.to_string(), } } else { x.to_string() } }) .collect(); final_string } fn internal_exec_cmd(cmd: &str, args: &[&str]) -> Option { log::trace!("Executing command {:?} with args {:?}", cmd, args); let full_path = match which::which(cmd) { Ok(full_path) => { log::trace!("Using {:?} as {:?}", full_path, cmd); full_path } Err(error) => { log::trace!("Unable to find {:?} in PATH, {:?}", cmd, error); return None; } }; let time_limit = Duration::from_millis(500); let start = Instant::now(); let process = match Command::new(full_path) .args(args) .stderr(Stdio::piped()) .stdout(Stdio::piped()) .spawn() { Ok(process) => process, Err(error) => { log::info!("Unable to run {:?}, {:?}", cmd, error); return None; } }; match process.with_output_timeout(time_limit).terminating().wait() { Ok(Some(output)) => { let stdout_string = String::from_utf8(output.stdout).unwrap(); let stderr_string = String::from_utf8(output.stderr).unwrap(); log::trace!( "stdout: {:?}, stderr: {:?}, exit code: \"{:?}\", took {:?}", stdout_string, stderr_string, output.status.code(), start.elapsed() ); if !output.status.success() { return None; } Some(CommandOutput { stdout: stdout_string, stderr: stderr_string, }) } Ok(None) => { log::warn!("Executing command {:?} timed out", cmd); None } Err(error) => { log::info!("Executing command {:?} failed by: {:?}", cmd, error); None } } } #[cfg(test)] mod tests { use super::*; #[test] fn exec_mocked_command() { let result = exec_cmd("dummy_command", &[]); let expected = Some(CommandOutput { stdout: String::from("stdout ok!\n"), stderr: String::from("stderr ok!\n"), }); assert_eq!(result, expected) } // While the exec_cmd should work on Windows some of these tests assume a Unix-like // environment. #[test] #[cfg(not(windows))] fn exec_no_output() { let result = internal_exec_cmd("true", &[]); let expected = Some(CommandOutput { stdout: String::from(""), stderr: String::from(""), }); assert_eq!(result, expected) } #[test] #[cfg(not(windows))] fn exec_with_output_stdout() { let result = internal_exec_cmd("/bin/sh", &["-c", "echo hello"]); let expected = Some(CommandOutput { stdout: String::from("hello\n"), stderr: String::from(""), }); assert_eq!(result, expected) } #[test] #[cfg(not(windows))] fn exec_with_output_stderr() { let result = internal_exec_cmd("/bin/sh", &["-c", "echo hello >&2"]); let expected = Some(CommandOutput { stdout: String::from(""), stderr: String::from("hello\n"), }); assert_eq!(result, expected) } #[test] #[cfg(not(windows))] fn exec_with_output_both() { let result = internal_exec_cmd("/bin/sh", &["-c", "echo hello; echo world >&2"]); let expected = Some(CommandOutput { stdout: String::from("hello\n"), stderr: String::from("world\n"), }); assert_eq!(result, expected) } #[test] #[cfg(not(windows))] fn exec_with_non_zero_exit_code() { let result = internal_exec_cmd("false", &[]); let expected = None; assert_eq!(result, expected) } #[test] #[cfg(not(windows))] fn exec_slow_command() { let result = internal_exec_cmd("sleep", &["500"]); let expected = None; assert_eq!(result, expected) } #[test] fn test_color_sequence_wrappers() { let test0 = "\x1b2mhellomynamekeyes\x1b2m"; // BEGIN: \x1b END: m let test1 = "\x1b]330;mlol\x1b]0m"; // BEGIN: \x1b END: m let test2 = "\u{1b}J"; // BEGIN: \x1b END: J let test3 = "OH NO"; // BEGIN: O END: O let test4 = "herpaderp"; let test5 = ""; let zresult0 = wrap_seq_for_shell(test0.to_string(), Shell::Zsh, '\x1b', 'm'); let zresult1 = wrap_seq_for_shell(test1.to_string(), Shell::Zsh, '\x1b', 'm'); let zresult2 = wrap_seq_for_shell(test2.to_string(), Shell::Zsh, '\x1b', 'J'); let zresult3 = wrap_seq_for_shell(test3.to_string(), Shell::Zsh, 'O', 'O'); let zresult4 = wrap_seq_for_shell(test4.to_string(), Shell::Zsh, '\x1b', 'm'); let zresult5 = wrap_seq_for_shell(test5.to_string(), Shell::Zsh, '\x1b', 'm'); assert_eq!(&zresult0, "%{\x1b2m%}hellomynamekeyes%{\x1b2m%}"); assert_eq!(&zresult1, "%{\x1b]330;m%}lol%{\x1b]0m%}"); assert_eq!(&zresult2, "%{\x1bJ%}"); assert_eq!(&zresult3, "%{OH NO%}"); assert_eq!(&zresult4, "herpaderp"); assert_eq!(&zresult5, ""); let bresult0 = wrap_seq_for_shell(test0.to_string(), Shell::Bash, '\x1b', 'm'); let bresult1 = wrap_seq_for_shell(test1.to_string(), Shell::Bash, '\x1b', 'm'); let bresult2 = wrap_seq_for_shell(test2.to_string(), Shell::Bash, '\x1b', 'J'); let bresult3 = wrap_seq_for_shell(test3.to_string(), Shell::Bash, 'O', 'O'); let bresult4 = wrap_seq_for_shell(test4.to_string(), Shell::Bash, '\x1b', 'm'); let bresult5 = wrap_seq_for_shell(test5.to_string(), Shell::Bash, '\x1b', 'm'); assert_eq!(&bresult0, "\\[\x1b2m\\]hellomynamekeyes\\[\x1b2m\\]"); assert_eq!(&bresult1, "\\[\x1b]330;m\\]lol\\[\x1b]0m\\]"); assert_eq!(&bresult2, "\\[\x1bJ\\]"); assert_eq!(&bresult3, "\\[OH NO\\]"); assert_eq!(&bresult4, "herpaderp"); assert_eq!(&bresult5, ""); } }