shell-words-1.1.0/.cargo_vcs_info.json0000644000000001360000000000100132760ustar { "git": { "sha1": "045e4dccd2478ccc8bfa91bd0fe449dfe5473496" }, "path_in_vcs": "" }shell-words-1.1.0/.gitignore000064400000000000000000000000360072674642500141050ustar 00000000000000/target **/*.rs.bk Cargo.lock shell-words-1.1.0/Cargo.toml0000644000000015450000000000100113010ustar # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g., crates.io) dependencies. # # If you are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] name = "shell-words" version = "1.1.0" authors = ["Tomasz Miąsko "] description = "Process command line according to parsing rules of UNIX shell" readme = "README.md" keywords = [ "quote", "shell", "split", "unix", "words", ] license = "MIT/Apache-2.0" repository = "https://github.com/tmiasko/shell-words" [features] default = ["std"] std = [] shell-words-1.1.0/Cargo.toml.orig000064400000000000000000000006100072674642500150020ustar 00000000000000[package] name = "shell-words" version = "1.1.0" authors = ["Tomasz Miąsko "] license = "MIT/Apache-2.0" repository = "https://github.com/tmiasko/shell-words" description = "Process command line according to parsing rules of UNIX shell" readme = "README.md" keywords = [ "quote", "shell", "split", "unix", "words", ] [features] default = ["std"] std = [] shell-words-1.1.0/LICENSE-APACHE000064400000000000000000000247240072674642500140530ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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See the License for the specific language governing permissions and limitations under the License. shell-words-1.1.0/LICENSE-MIT000064400000000000000000000020420072674642500135500ustar 00000000000000Copyright (c) 2016 Tomasz Miąsko Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. shell-words-1.1.0/README.md000064400000000000000000000040560072674642500134020ustar 00000000000000# shell-words Process command line according to parsing rules of Unix shell. ## Usage Add this to Cargo.toml: ```toml [dependencies] shell-words = "1.0.0" ``` Add this to your crate: ```rust extern crate shell_words; ``` ## Examples ### Split Compiling C source code into an executable as in default build rule found in GNU Make: ```rust extern crate shell_words; use std::env::var; use std::process::Command; fn main() { let cc = var("CC").unwrap_or_else(|_| "cc".to_owned()); let cflags = var("CFLAGS").unwrap_or_else(|_| String::new()); let cflags = shell_words::split(&cflags).expect("failed to parse CFLAGS"); let cppflags = var("CPPFLAGS").unwrap_or_else(|_| String::new()); let cppflags = shell_words::split(&cppflags).expect("failed to parse CPPFLAGS"); Command::new(cc) .args(cflags) .args(cppflags) .args(&["-c", "a.c", "-o", "a.out"]) .spawn() .expect("failed to start subprocess") .wait() .expect("failed to wait for subprocess"); } ``` ### Join Logging executed commands in format that can be readily copied and pasted to a shell: ```rust extern crate shell_words; fn main() { let argv = &["python", "-c", "print('Hello world!')"]; println!("Executing: {}", shell_words::join(argv)); std::process::Command::new(&argv[0]) .args(&argv[1..]) .spawn() .expect("failed to start subprocess") .wait() .expect("failed to wait for subprocess"); } ``` ## Bugs Please report any issues at https://github.com/tmiasko/shell-words/issues. ## License Licensed under either of * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) at your option. ## Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. shell-words-1.1.0/rustfmt.toml000064400000000000000000000000250072674642500145140ustar 00000000000000wrap_comments = true shell-words-1.1.0/src/lib.rs000064400000000000000000000354750072674642500140370ustar 00000000000000// Copyright 2018 Tomasz Miąsko // // Licensed under the Apache License, Version 2.0 // or the MIT license , at your option. // //! Process command line according to parsing rules of Unix shell as specified //! in [Shell Command Language in POSIX.1-2008][posix-shell]. //! //! [posix-shell]: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html #![cfg_attr(not(feature = "std"), no_std)] #![forbid(unsafe_code)] #[cfg(feature = "std")] extern crate core; use core::fmt; use core::mem; #[cfg(not(feature = "std"))] #[macro_use] extern crate alloc; #[cfg(not(feature = "std"))] use alloc::string::String; #[cfg(not(feature = "std"))] use alloc::vec::Vec; #[cfg(not(feature = "std"))] use alloc::borrow::Cow; #[cfg(feature = "std")] use std::borrow::Cow; /// An error returned when shell parsing fails. #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub struct ParseError; impl fmt::Display for ParseError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str("missing closing quote") } } #[cfg(feature = "std")] impl std::error::Error for ParseError {} enum State { /// Within a delimiter. Delimiter, /// After backslash, but before starting word. Backslash, /// Within an unquoted word. Unquoted, /// After backslash in an unquoted word. UnquotedBackslash, /// Within a single quoted word. SingleQuoted, /// Within a double quoted word. DoubleQuoted, /// After backslash inside a double quoted word. DoubleQuotedBackslash, /// Inside a comment. Comment, } /// Splits command line into separate arguments, in much the same way Unix shell /// would, but without many of expansion the shell would perform. /// /// The split functionality is compatible with behaviour of Unix shell, but with /// word expansions limited to quote removal, and without special token /// recognition rules for operators. /// /// The result is exactly the same as one obtained from Unix shell as long as /// those unsupported features are not present in input: no operators, no /// variable assignments, no tilde expansion, no parameter expansion, no command /// substitution, no arithmetic expansion, no pathname expansion. /// /// In case those unsupported shell features are present, the syntax that /// introduce them is interpreted literally. /// /// # Errors /// /// When input contains unmatched quote, an error is returned. /// /// # Compatibility with other implementations /// /// It should be fully compatible with g_shell_parse_argv from GLib, except that /// in GLib it is an error not to have any words after tokenization. /// /// It is also very close to shlex.split available in Python standard library, /// when used in POSIX mode with support for comments. Though, shlex /// implementation diverges from POSIX, and from implementation contained herein /// in three aspects. First, it doesn't support line continuations. /// Second, inside double quotes, the backslash characters retains its special /// meaning as an escape character only when followed by \\ or \", whereas POSIX /// specifies that it should retain its special meaning when followed by: $, \`, /// \", \\, or a newline. Third, it treats carriage return as one of delimiters. /// /// # Examples /// /// Building an executable using compiler obtained from CC environment variable /// and compiler flags from both CFLAGS and CPPFLAGS. Similar to default build /// rule for C used in GNU Make: /// /// ```rust,no_run /// use std::env::var; /// use std::process::Command; /// /// let cc = var("CC").unwrap_or_else(|_| "cc".to_owned()); /// /// let cflags_str = var("CFLAGS").unwrap_or_else(|_| String::new()); /// let cflags = shell_words::split(&cflags_str).expect("failed to parse CFLAGS"); /// /// let cppflags_str = var("CPPFLAGS").unwrap_or_else(|_| String::new()); /// let cppflags = shell_words::split(&cppflags_str).expect("failed to parse CPPFLAGS"); /// /// Command::new(cc) /// .args(cflags) /// .args(cppflags) /// .args(&["-c", "a.c", "-o", "a.out"]) /// .spawn() /// .expect("failed to start subprocess") /// .wait() /// .expect("failed to wait for subprocess"); /// ``` pub fn split(s: &str) -> Result, ParseError> { use State::*; let mut words = Vec::new(); let mut word = String::new(); let mut chars = s.chars(); let mut state = Delimiter; loop { let c = chars.next(); state = match state { Delimiter => match c { None => break, Some('\'') => SingleQuoted, Some('\"') => DoubleQuoted, Some('\\') => Backslash, Some('\t') | Some(' ') | Some('\n') => Delimiter, Some('#') => Comment, Some(c) => { word.push(c); Unquoted } }, Backslash => match c { None => { word.push('\\'); words.push(mem::replace(&mut word, String::new())); break; } Some('\n') => Delimiter, Some(c) => { word.push(c); Unquoted } }, Unquoted => match c { None => { words.push(mem::replace(&mut word, String::new())); break; } Some('\'') => SingleQuoted, Some('\"') => DoubleQuoted, Some('\\') => UnquotedBackslash, Some('\t') | Some(' ') | Some('\n') => { words.push(mem::replace(&mut word, String::new())); Delimiter } Some(c) => { word.push(c); Unquoted } }, UnquotedBackslash => match c { None => { word.push('\\'); words.push(mem::replace(&mut word, String::new())); break; } Some('\n') => Unquoted, Some(c) => { word.push(c); Unquoted } }, SingleQuoted => match c { None => return Err(ParseError), Some('\'') => Unquoted, Some(c) => { word.push(c); SingleQuoted } }, DoubleQuoted => match c { None => return Err(ParseError), Some('\"') => Unquoted, Some('\\') => DoubleQuotedBackslash, Some(c) => { word.push(c); DoubleQuoted } }, DoubleQuotedBackslash => match c { None => return Err(ParseError), Some('\n') => DoubleQuoted, Some(c @ '$') | Some(c @ '`') | Some(c @ '"') | Some(c @ '\\') => { word.push(c); DoubleQuoted } Some(c) => { word.push('\\'); word.push(c); DoubleQuoted } }, Comment => match c { None => break, Some('\n') => Delimiter, Some(_) => Comment, }, } } Ok(words) } enum EscapeStyle { /// No escaping. None, /// Wrap in single quotes. SingleQuoted, /// Single quotes combined with backslash. Mixed, } /// Determines escaping style to use. fn escape_style(s: &str) -> EscapeStyle { if s.is_empty() { return EscapeStyle::SingleQuoted; } let mut special = false; let mut newline = false; let mut single_quote = false; for c in s.chars() { match c { '\n' => { newline = true; special = true; } '\'' => { single_quote = true; special = true; } '|' | '&' | ';' | '<' | '>' | '(' | ')' | '$' | '`' | '\\' | '"' | ' ' | '\t' | '*' | '?' | '[' | '#' | '˜' | '=' | '%' => { special = true; } _ => continue, } } if !special { EscapeStyle::None } else if newline && !single_quote { EscapeStyle::SingleQuoted } else { EscapeStyle::Mixed } } /// Escapes special characters in a string, so that it will retain its literal /// meaning when used as a part of command in Unix shell. /// /// It tries to avoid introducing any unnecessary quotes or escape characters, /// but specifics regarding quoting style are left unspecified. pub fn quote(s: &str) -> Cow { // We are going somewhat out of the way to provide // minimal amount of quoting in typical cases. match escape_style(s) { EscapeStyle::None => s.into(), EscapeStyle::SingleQuoted => format!("'{}'", s).into(), EscapeStyle::Mixed => { let mut quoted = String::new(); quoted.push('\''); for c in s.chars() { if c == '\'' { quoted.push_str("'\\''"); } else { quoted.push(c); } } quoted.push('\''); quoted.into() } } } /// Joins arguments into a single command line suitable for execution in Unix /// shell. /// /// Each argument is quoted using [`quote`] to preserve its literal meaning when /// parsed by Unix shell. /// /// Note: This function is essentially an inverse of [`split`]. /// /// # Examples /// /// Logging executed commands in format that can be easily copied and pasted /// into an actual shell: /// /// ```rust,no_run /// fn execute(args: &[&str]) { /// use std::process::Command; /// println!("Executing: {}", shell_words::join(args)); /// Command::new(&args[0]) /// .args(&args[1..]) /// .spawn() /// .expect("failed to start subprocess") /// .wait() /// .expect("failed to wait for subprocess"); /// } /// /// execute(&["python", "-c", "print('Hello world!')"]); /// ``` /// /// [`quote`]: fn.quote.html /// [`split`]: fn.split.html pub fn join(words: I) -> String where I: IntoIterator, S: AsRef, { let mut line = words.into_iter().fold(String::new(), |mut line, word| { let quoted = quote(word.as_ref()); line.push_str(quoted.as_ref()); line.push(' '); line }); line.pop(); line } #[cfg(test)] mod tests { use super::*; fn split_ok(cases: &[(&str, &[&str])]) { for &(input, expected) in cases { match split(input) { Err(actual) => { panic!( "After split({:?})\nexpected: Ok({:?})\n actual: Err({:?})\n", input, expected, actual ); } Ok(actual) => { assert!( expected == actual.as_slice(), "After split({:?}).unwrap()\nexpected: {:?}\n actual: {:?}\n", input, expected, actual ); } } } } #[test] fn split_empty() { split_ok(&[("", &[])]); } #[test] fn split_initial_whitespace_is_removed() { split_ok(&[ (" a", &["a"]), ("\t\t\t\tbar", &["bar"]), ("\t \nc", &["c"]), ]); } #[test] fn split_trailing_whitespace_is_removed() { split_ok(&[ ("a ", &["a"]), ("b\t", &["b"]), ("c\t \n \n \n", &["c"]), ("d\n\n", &["d"]), ]); } #[test] fn split_carriage_return_is_not_special() { split_ok(&[("c\ra\r'\r'\r", &["c\ra\r\r\r"])]); } #[test] fn split_single_quotes() { split_ok(&[ (r#"''"#, &[r#""#]), (r#"'a'"#, &[r#"a"#]), (r#"'\'"#, &[r#"\"#]), (r#"' \ '"#, &[r#" \ "#]), (r#"'#'"#, &[r#"#"#]), ]); } #[test] fn split_double_quotes() { split_ok(&[ (r#""""#, &[""]), (r#""""""#, &[""]), (r#""a b c' d""#, &["a b c' d"]), (r#""\a""#, &["\\a"]), (r#""$""#, &["$"]), (r#""\$""#, &["$"]), (r#""`""#, &["`"]), (r#""\`""#, &["`"]), (r#""\"""#, &["\""]), (r#""\\""#, &["\\"]), ("\"\n\"", &["\n"]), ("\"\\\n\"", &[""]), ]); } #[test] fn split_unquoted() { split_ok(&[ (r#"\|\&\;"#, &[r#"|&;"#]), (r#"\<\>"#, &[r#"<>"#]), (r#"\(\)"#, &[r#"()"#]), (r#"\$"#, &[r#"$"#]), (r#"\`"#, &[r#"`"#]), (r#"\""#, &[r#"""#]), (r#"\'"#, &[r#"'"#]), ("\\\n", &[]), (" \\\n \n", &[]), ("a\nb\nc", &["a", "b", "c"]), ("a\\\nb\\\nc", &["abc"]), ("foo bar baz", &["foo", "bar", "baz"]), (r#"\🦉"#, &[r"🦉"]), ]); } #[test] fn split_trailing_backslash() { split_ok(&[("\\", &["\\"]), (" \\", &["\\"]), ("a\\", &["a\\"])]); } #[test] fn split_errors() { assert_eq!(split("'abc"), Err(ParseError)); assert_eq!(split("\""), Err(ParseError)); assert_eq!(split("'\\"), Err(ParseError)); assert_eq!(split("'\\"), Err(ParseError)); } #[test] fn split_comments() { split_ok(&[ (r#" x # comment "#, &["x"]), (r#" w1#w2 "#, &["w1#w2"]), (r#"'not really a # comment'"#, &["not really a # comment"]), (" a # very long comment \n b # another comment", &["a", "b"]), ]); } #[test] fn test_quote() { assert_eq!(quote(""), "''"); assert_eq!(quote("'"), "''\\'''"); assert_eq!(quote("abc"), "abc"); assert_eq!(quote("a \n b"), "'a \n b'"); assert_eq!(quote("X'\nY"), "'X'\\''\nY'"); } #[test] fn test_join() { assert_eq!(join(&["a", "b", "c"]), "a b c"); assert_eq!(join(&[" ", "$", "\n"]), "' ' '$' '\n'"); } #[test] fn join_followed_by_split_is_identity() { let cases: Vec<&[&str]> = vec![ &["a"], &["python", "-c", "print('Hello world!')"], &["echo", " arg with spaces ", "arg \' with \" quotes"], &["even newlines are quoted correctly\n", "\n", "\n\n\t "], &["$", "`test`"], &["cat", "~user/log*"], &["test", "'a \"b", "\"X'"], &["empty", "", "", ""], ]; for argv in cases { let args = join(argv); assert_eq!(split(&args).unwrap(), argv); } } }