diff --git a/1 b/1
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/manual/src/ch11-00-builtins.md b/manual/src/ch11-00-builtins.md
index aa791398d93a40feb8689fc5f5a9751c6d924c20..850bb47ba6c70305cd2bd95c3d9adab902024bfe 100644
--- a/manual/src/ch11-00-builtins.md
+++ b/manual/src/ch11-00-builtins.md
@@ -411,4 +411,15 @@ Evaluates the current runtime status
bool VALUE
```
-If the value is '1' or 'true', return 0 exit status
\ No newline at end of file
+If the value is '1' or 'true', returns the 0 exit status
+
+## is
+
+```
+is VALUE VALUE
+```
+
+Returns 0 if the two arguments are equal
+
+### Options
+- **not**: returns 0 if the two arguments are not equal.
\ No newline at end of file
diff --git a/src/builtins/README.md b/src/builtins/README.md
index 5d91a05ae08904cce413476806baa87d5a7d5c7d..480ad68ffaf75fc277a4f3b1ebf819d67c24820e 100644
--- a/src/builtins/README.md
+++ b/src/builtins/README.md
@@ -29,3 +29,7 @@ Source code for the time command, which is used to evaluate the time spent runni
## variables.rs
The **variables.rs** module contains commands relating to setting and removing aliases, variables, and exports.
+
+## status.rs
+
+The source for status command, which is used to get information at runtime about the shell.
diff --git a/src/builtins/is.rs b/src/builtins/is.rs
new file mode 100644
index 0000000000000000000000000000000000000000..e8c64e3814323e00fe15839f0e69908412799b61
--- /dev/null
+++ b/src/builtins/is.rs
@@ -0,0 +1,69 @@
+use std::error::Error;
+use std::io::{Write, stdout};
+
+use shell::Shell;
+
+const MAN_PAGE: &'static str = r#"NAME
+ is - Checks if two arguments are the same
+
+SYNOPSIS
+ is [ -h | --help ] [not]
+
+DESCRIPTION
+ Returns 0 if the two arguments are equal
+
+OPTIONS
+ not
+ returns 0 if the two arguments are not equal.
+"#; // @MANEND
+
+pub(crate) fn is(args: &[&str], shell: &mut Shell) -> Result<(), String> {
+ match args.len() {
+ 4 => if args[1] != "not" {
+ return Err(format!("Expected 'not' instead found '{}'\n", args[1]).to_string());
+ } else if eval_arg(args[2], shell) == eval_arg(args[3], shell) {
+ return Err("".to_string());
+ },
+ 3 => if eval_arg(args[1], shell) != eval_arg(args[2], shell) {
+ return Err("".to_string());
+ },
+ 2 => if args[1] == "-h" || args[1] == "--help" {
+ let stdout = stdout();
+ let mut stdout = stdout.lock();
+
+ return match stdout.write_all(MAN_PAGE.as_bytes()).and_then(|_| stdout.flush()) {
+ Ok(_) => Ok(()),
+ Err(err) => Err(err.description().to_owned()),
+ }
+ } else {
+ return Err("is needs 3 or 4 arguments\n".to_string())
+ },
+ _ => return Err("is needs 3 or 4 arguments\n".to_string()),
+ }
+
+ Ok(())
+}
+
+fn eval_arg(arg: &str, shell: &mut Shell) -> String {
+ let var_value = get_var_string(arg, shell);
+
+ if var_value != "" {
+ return var_value
+ }
+ arg.to_string()
+}
+
+// On error returns an empty String.
+fn get_var_string(name: &str, shell: &mut Shell) -> String {
+ if name.chars().nth(0).unwrap() != '$' {
+ return "".to_string()
+ }
+
+ let var = shell.variables.get_var(&name[1..]);
+ let sh_var: &str = match var.as_ref() {
+ Some(s) => s,
+ None => "",
+ };
+
+ sh_var.to_string()
+}
\ No newline at end of file
diff --git a/src/builtins/mod.rs b/src/builtins/mod.rs
index a01e1430c1c30a97c5790638b9b4777c9eca9710..b43a1f9d6d304d39f1c3975aab5ac0fd9c452ccd 100644
--- a/src/builtins/mod.rs
+++ b/src/builtins/mod.rs
@@ -12,12 +12,14 @@ mod set;
mod status;
mod exists;
mod ion;
+mod is;
use self::conditionals::{contains, ends_with, starts_with};
use self::echo::echo;
use self::exists::exists;
use self::functions::fn_;
use self::ion::ion_docs;
+use self::is::is;
use self::status::status;
use self::source::source;
use self::test::test;
@@ -77,6 +79,7 @@ pub const BUILTINS: &'static BuiltinMap = &map!(
"help" => builtin_help : HELP_DESC,
"history" => builtin_history : "Display a log of all commands previously executed",
"ion-docs" => ion_docs : "Opens the Ion manual",
+ "is" => builtin_is : "Simple alternative to == and !=",
"jobs" => builtin_jobs : "Displays all jobs that are attached to the background",
"matches" => builtin_matches : "Checks if a string matches a given regex",
"not" => builtin_not : "Reverses the exit status value of the given command.",
@@ -161,7 +164,7 @@ fn builtin_bool(args: &[&str], shell: &mut Shell) -> i32 {
return FAILURE
}
- let opt = shell.variables.get_var(args[1]);
+ let opt = shell.variables.get_var(&args[1][1..]);
let sh_var: &str = match opt.as_ref() {
Some(s) => s,
None => "",
@@ -179,10 +182,21 @@ fn builtin_bool(args: &[&str], shell: &mut Shell) -> i32 {
_ => return FAILURE
}
}
-
SUCCESS
}
+fn builtin_is(args: &[&str], shell: &mut Shell) -> i32 {
+ match is(args, shell) {
+ Ok(()) => SUCCESS,
+ Err(why) => {
+ let stderr = io::stderr();
+ let mut stderr = stderr.lock();
+ let _ = stderr.write_all(why.as_bytes());
+ FAILURE
+ }
+ }
+}
+
fn builtin_dirs(args: &[&str], shell: &mut Shell) -> i32 { shell.directory_stack.dirs(args) }
fn builtin_pushd(args: &[&str], shell: &mut Shell) -> i32 {
@@ -241,6 +255,7 @@ fn builtin_not(args: &[&str], shell: &mut Shell) -> i32 {
}
fn builtin_set(args: &[&str], shell: &mut Shell) -> i32 { set::set(args, shell) }
+
fn builtin_eval(args: &[&str], shell: &mut Shell) -> i32 {
let evaluated_command = args[1..].join(" ");
let mut buffer = Terminator::new(evaluated_command);
@@ -254,6 +269,7 @@ fn builtin_eval(args: &[&str], shell: &mut Shell) -> i32 {
FAILURE
}
}
+
fn builtin_history(args: &[&str], shell: &mut Shell) -> i32 { shell.print_history(args) }
fn builtin_source(args: &[&str], shell: &mut Shell) -> i32 {