From 792b7a249cb4ed2878242e20bf1de7b0fb2cbf9f Mon Sep 17 00:00:00 2001
From: Casey Rodarmor <casey@rodarmor.com>
Date: Tue, 16 Apr 2019 19:52:16 -0700
Subject: [PATCH] Pass stdin handle to backtick process (#409)

---
 src/assignment_evaluator.rs |   4 +-
 tests/integration.rs        | 271 ++++++++++++++++++++++++++++++++++--
 2 files changed, 266 insertions(+), 9 deletions(-)

diff --git a/src/assignment_evaluator.rs b/src/assignment_evaluator.rs
index 5bdb649..5b6a204 100644
--- a/src/assignment_evaluator.rs
+++ b/src/assignment_evaluator.rs
@@ -141,9 +141,11 @@ impl<'a, 'b> AssignmentEvaluator<'a, 'b> {
   ) -> RunResult<'a, String> {
     let mut cmd = Command::new(self.shell);
 
+    cmd.arg("-cu").arg(raw);
+
     cmd.export_environment_variables(self.scope, dotenv, self.exports)?;
 
-    cmd.arg("-cu").arg(raw);
+    cmd.stdin(process::Stdio::inherit());
 
     cmd.stderr(if self.quiet {
       process::Stdio::null()
diff --git a/tests/integration.rs b/tests/integration.rs
index a346d85..395858d 100644
--- a/tests/integration.rs
+++ b/tests/integration.rs
@@ -1,6 +1,11 @@
 use executable_path::executable_path;
 use libc::{EXIT_FAILURE, EXIT_SUCCESS};
-use std::{env, fs, process, str};
+use std::{
+  env, fs,
+  io::Write,
+  process::{Command, Stdio},
+  str,
+};
 use tempdir::TempDir;
 
 /// Instantiate integration tests for a given test case using
@@ -15,6 +20,7 @@ macro_rules! integration_test {
     name:     $name:ident,
     justfile: $text:tt,
     args:     ($($arg:tt)*),
+    stdin:    $stdin:expr,
     stdout:   $stdout:expr,
     stderr:   $stderr:expr,
     status:   $status:expr,
@@ -25,9 +31,9 @@ macro_rules! integration_test {
       // silence unused import warnings
       const __: i32 = EXIT_SUCCESS;
 
-      #[test] fn sh()   { integration_test("sh",   $text, &[$($arg)*], $stdout, $stderr, $status); }
-      #[test] fn dash() { integration_test("dash", $text, &[$($arg)*], $stdout, $stderr, $status); }
-      #[test] fn bash() { integration_test("bash", $text, &[$($arg)*], $stdout, $stderr, $status); }
+      #[test] fn sh()   { integration_test("sh",   $text, &[$($arg)*], $stdin, $stdout, $stderr, $status); }
+      #[test] fn dash() { integration_test("dash", $text, &[$($arg)*], $stdin, $stdout, $stderr, $status); }
+      #[test] fn bash() { integration_test("bash", $text, &[$($arg)*], $stdin, $stdout, $stderr, $status); }
     }
   }
 }
@@ -36,6 +42,7 @@ fn integration_test(
   shell: &str,
   justfile: &str,
   args: &[&str],
+  stdin: &str,
   expected_stdout: &str,
   expected_stderr: &str,
   expected_status: i32,
@@ -55,13 +62,28 @@ fn integration_test(
   dotenv_path.push(".env");
   brev::dump(dotenv_path, "DOTENV_KEY=dotenv-value");
 
-  let output = process::Command::new(&executable_path("just"))
+  let mut child = Command::new(&executable_path("just"))
     .current_dir(tmp.path())
     .args(&["--shell", shell])
     .args(args)
-    .output()
+    .stdin(Stdio::piped())
+    .stdout(Stdio::piped())
+    .stderr(Stdio::piped())
+    .spawn()
     .expect("just invocation failed");
 
+  {
+    let mut stdin_handle = child.stdin.take().expect("failed to unwrap stdin handle");
+
+    stdin_handle
+      .write_all(stdin.as_bytes())
+      .expect("failed to write stdin to just process");
+  }
+
+  let output = child
+    .wait_with_output()
+    .expect("failed to wait for just process");
+
   let mut failure = false;
 
   let status = output.status.code().unwrap();
@@ -95,7 +117,7 @@ fn integration_test(
   if expected_status == EXIT_SUCCESS {
     println!("Reparsing...");
 
-    let output = process::Command::new(&executable_path("just"))
+    let output = Command::new(&executable_path("just"))
       .current_dir(tmp.path())
       .arg("--dump")
       .output()
@@ -111,7 +133,7 @@ fn integration_test(
 
     fs::write(&reparsed_path, &dumped).unwrap();
 
-    let output = process::Command::new(&executable_path("just"))
+    let output = Command::new(&executable_path("just"))
       .current_dir(tmp.path())
       .arg("--justfile")
       .arg(&reparsed_path)
@@ -137,6 +159,7 @@ integration_test! {
   name: alias_listing,
   justfile: "foo:\n  echo foo\nalias f = foo",
   args: ("--list"),
+  stdin:  "",
   stdout: "Available recipes:
     foo
     f   # alias for `foo`
@@ -149,6 +172,7 @@ integration_test! {
   name: alias_listing_multiple_aliases,
   justfile: "foo:\n  echo foo\nalias f = foo\nalias fo = foo",
   args: ("--list"),
+  stdin:  "",
   stdout: "Available recipes:
     foo
     f   # alias for `foo`
@@ -162,6 +186,7 @@ integration_test! {
   name: alias_listing_parameters,
   justfile: "foo PARAM='foo':\n  echo {{PARAM}}\nalias f = foo",
   args: ("--list"),
+  stdin:  "",
   stdout: "Available recipes:
     foo PARAM='foo'
     f PARAM='foo'   # alias for `foo`
@@ -174,6 +199,7 @@ integration_test! {
   name: alias_listing_private,
   justfile: "foo PARAM='foo':\n  echo {{PARAM}}\nalias _f = foo",
   args: ("--list"),
+  stdin:  "",
   stdout: "Available recipes:
     foo PARAM='foo'
 ",
@@ -185,6 +211,7 @@ integration_test! {
   name: alias,
   justfile: "foo:\n  echo foo\nalias f = foo",
   args: ("f"),
+  stdin:  "",
   stdout: "foo\n",
   stderr: "echo foo\n",
   status: EXIT_SUCCESS,
@@ -194,6 +221,7 @@ integration_test! {
   name: alias_with_parameters,
   justfile: "foo value='foo':\n  echo {{value}}\nalias f = foo",
   args: ("f", "bar"),
+  stdin:  "",
   stdout: "bar\n",
   stderr: "echo bar\n",
   status: EXIT_SUCCESS,
@@ -203,6 +231,7 @@ integration_test! {
   name: alias_with_dependencies,
   justfile: "foo:\n  echo foo\nbar: foo\nalias b = bar",
   args: ("b"),
+  stdin:  "",
   stdout: "foo\n",
   stderr: "echo foo\n",
   status: EXIT_SUCCESS,
@@ -212,6 +241,7 @@ integration_test! {
   name: duplicate_alias,
   justfile: "alias foo = bar\nalias foo = baz\n",
   args: (),
+  stdin:  "",
   stdout: "" ,
   stderr: "error: Alias `foo` first defined on line `1` is redefined on line `2`
   |
@@ -225,6 +255,7 @@ integration_test! {
   name: unknown_alias_target,
   justfile: "alias foo = bar\n",
   args: (),
+  stdin:  "",
   stdout: "",
   stderr: "error: Alias `foo` has an unknown target `bar`
   |
@@ -238,6 +269,7 @@ integration_test! {
   name: alias_shadows_recipe,
   justfile: "bar:\n  echo bar\nalias foo = bar\nfoo:\n  echo foo",
   args: (),
+  stdin:  "",
   stdout: "",
   stderr: "error: Alias `foo` defined on `3` shadows recipe defined on `4`
   |
@@ -251,6 +283,7 @@ integration_test! {
   name:     default,
   justfile: "default:\n echo hello\nother: \n echo bar",
   args:     (),
+  stdin:    "",
   stdout:   "hello\n",
   stderr:   "echo hello\n",
   status:   EXIT_SUCCESS,
@@ -260,6 +293,7 @@ integration_test! {
   name:     quiet,
   justfile: "default:\n @echo hello",
   args:     (),
+  stdin:    "",
   stdout:   "hello\n",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -269,6 +303,7 @@ integration_test! {
   name:     verbose,
   justfile: "default:\n @echo hello",
   args:     ("--verbose"),
+  stdin:    "",
   stdout:   "hello\n",
   stderr:   "===> Running recipe `default`...\necho hello\n",
   status:   EXIT_SUCCESS,
@@ -294,6 +329,7 @@ c: b
   echo c
   @mv b c",
   args:     ("a", "d"),
+  stdin:    "",
   stdout:   "a\nb\nc\nd\n",
   stderr:   "echo a\necho b\necho c\necho d\n",
   status:   EXIT_SUCCESS,
@@ -309,6 +345,7 @@ _z: _y
 _y:
 ",
   args:     ("--summary"),
+  stdin:    "",
   stdout:   "a b c d\n",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -325,6 +362,7 @@ d:
 c:
   @echo c",
   args:     ("d", "c"),
+  stdin:    "",
   stdout:   "d\nc\n",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -341,6 +379,7 @@ d:
 c:
   echo c",
   args:     ("d", "c"),
+  stdin:    "",
   stdout:   "d\nc\n",
   stderr:   "echo d\necho c\n",
   status:   EXIT_SUCCESS,
@@ -353,6 +392,7 @@ bar = hello + hello
 recipe:
  echo {{hello + "bar" + bar}}"#,
   args:     ("--show", "recipe"),
+  stdin:    "",
   stdout:   r#"recipe:
     echo {{hello + "bar" + bar}}
 "#,
@@ -369,6 +409,7 @@ hello:
 recipe:
   @exit 100",
   args:     ("recipe"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `recipe` failed on line 6 with exit code 100\n",
   status:   100,
@@ -378,6 +419,7 @@ integration_test! {
   name:     unknown_dependency,
   justfile: "bar:\nhello:\nfoo: bar baaaaaaaz hello",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `foo` has unknown dependency `baaaaaaaz`
   |
@@ -391,6 +433,7 @@ integration_test! {
   name:     backtick_success,
   justfile: "a = `printf Hello,`\nbar:\n printf '{{a + `printf ' world.'`}}'",
   args:     (),
+  stdin:    "",
   stdout:   "Hello, world.",
   stderr:   "printf 'Hello, world.'\n",
   status:   EXIT_SUCCESS,
@@ -400,6 +443,7 @@ integration_test! {
   name:     backtick_trimming,
   justfile: "a = `echo Hello,`\nbar:\n echo '{{a + `echo ' world.'`}}'",
   args:     (),
+  stdin:    "",
   stdout:   "Hello, world.\n",
   stderr:   "echo 'Hello, world.'\n",
   status:   EXIT_SUCCESS,
@@ -409,6 +453,7 @@ integration_test! {
   name:     backtick_code_assignment,
   justfile: "b = a\na = `exit 100`\nbar:\n echo '{{`exit 200`}}'",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 100
   |
@@ -422,6 +467,7 @@ integration_test! {
   name:     backtick_code_interpolation,
   justfile: "b = a\na = `echo hello`\nbar:\n echo '{{`exit 200`}}'",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 200
   |
@@ -436,6 +482,7 @@ integration_test! {
   name:     backtick_code_interpolation_mod,
   justfile: "f:\n 無{{`exit 200`}}",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 200
   |
@@ -452,6 +499,7 @@ backtick-fail:
 \techo {{`exit 1`}}
 ",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 1
   |
@@ -468,6 +516,7 @@ backtick-fail:
 \techo {{\t`exit 1`}}
 ",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 1
   |
@@ -484,6 +533,7 @@ backtick-fail:
 \techo {{\t`exit\t\t1`}}
 ",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 1
   |
@@ -500,6 +550,7 @@ backtick-fail:
 \techo 😬{{`exit 1`}}
 ",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 1
   |
@@ -516,6 +567,7 @@ backtick-fail:
 \techo \t\t\t😬鎌鼬{{\t\t`exit 1 # \t\t\tabc`}}\t\t\t😬鎌鼬
 ",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 1
   |
@@ -529,6 +581,7 @@ integration_test! {
   name:     backtick_code_long,
   justfile: "\n\n\n\n\n\nb = a\na = `echo hello`\nbar:\n echo '{{`exit 200`}}'",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 200
    |
@@ -545,6 +598,7 @@ integration_test! {
  echo hello
  echo {{`exit 123`}}",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 123
   |
@@ -560,6 +614,7 @@ integration_test! {
  echo hello
  echo {{`exit 123`}}",
   args:     (),
+  stdin:    "",
   stdout:   "hello\n",
   stderr:   "echo hello\nerror: Backtick failed with exit code 123
   |
@@ -576,6 +631,7 @@ integration_test! {
  echo {{`exit 111`}}
 a = `exit 222`",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 222
   |
@@ -592,6 +648,7 @@ integration_test! {
  echo {{`exit 111`}}
 a = `exit 222`",
   args:     ("--set", "foo", "bar", "--set", "baz", "bob", "--set", "a", "b", "a", "b"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variables `baz` and `foo` overridden on the command line but not present \
     in justfile\n",
@@ -605,6 +662,7 @@ integration_test! {
  echo {{`exit 111`}}
 a = `exit 222`",
   args:     ("foo=bar", "baz=bob", "a=b", "a", "b"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variables `baz` and `foo` overridden on the command line but not present \
     in justfile\n",
@@ -618,6 +676,7 @@ integration_test! {
  echo {{`exit 111`}}
 a = `exit 222`",
   args:     ("foo=bar", "a=b", "a", "b"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variable `foo` overridden on the command line but not present in justfile\n",
   status:   EXIT_FAILURE,
@@ -634,6 +693,7 @@ recipe arg:
  echo arg={{arg}}
  echo {{foo + a + baz}}"#,
   args:     ("foo=bar", "a=b", "recipe", "baz=bar"),
+  stdin:    "",
   stdout:   "arg=baz=bar\nbarbbaz\n",
   stderr:   "echo arg=baz=bar\necho barbbaz\n",
   status:   EXIT_SUCCESS,
@@ -650,6 +710,7 @@ recipe arg:
  echo arg={{arg}}
  echo {{foo + a + baz}}"#,
   args:     ("foo=bar", "a=b", "recipe", "baz=bar"),
+  stdin:    "",
   stdout:   "arg=baz=bar\nbarbbaz\n",
   stderr:   "echo arg=baz=bar\necho barbbaz\n",
   status:   EXIT_SUCCESS,
@@ -671,6 +732,7 @@ shebang:
   {{var}}
   echo {{`echo shebang interpolation`}}"#,
   args:     ("--dry-run", "shebang", "command"),
+  stdin:    "",
   stdout:   "",
   stderr:   "#!/bin/sh
 touch /this/is/not/a/file
@@ -695,6 +757,7 @@ wut:
   touch /this/is/not/a/file
 "#,
   args:     ("--evaluate"),
+  stdin:    "",
   stdout:   r#"ab    = "a	b	c"
 bar   = "b	"
 foo   = "a	"
@@ -716,6 +779,7 @@ wut:
   echo $FOO $BAR $ABC
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "a b abc\n",
   stderr:   "echo $FOO $BAR $ABC\n",
   status:   EXIT_SUCCESS,
@@ -733,6 +797,7 @@ wut:
   echo $FOO $BAR $ABC
 "#,
   args:     ("--set", "BAR", "bye", "FOO=hello"),
+  stdin:    "",
   stdout:   "hello bye hello-bye-c\n",
   stderr:   "echo $FOO $BAR $ABC\n",
   status:   EXIT_SUCCESS,
@@ -751,6 +816,7 @@ wut:
   echo $FOO $BAR $ABC
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "a b abc\n",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -765,6 +831,7 @@ recipe:
   echo {{`echo recipe $EXPORTED_VARIABLE`}}
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "recipe A-IS-A\n",
   stderr:   "echo recipe A-IS-A\n",
   status:   EXIT_SUCCESS,
@@ -779,6 +846,7 @@ recipe:
   printf "$EXPORTED_VARIABLE"
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "\\z",
   stderr:   "printf \"$EXPORTED_VARIABLE\"\n",
   status:   EXIT_SUCCESS,
@@ -798,6 +866,7 @@ integration_test! {
 ???
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Unknown start of token:
    |
@@ -814,6 +883,7 @@ default:
   @echo hello
 "#,
   args:     ("--quiet"),
+  stdin:    "",
   stdout:   "",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -826,6 +896,7 @@ default:
   @echo hello 1>&2
 "#,
   args:     ("--quiet"),
+  stdin:    "",
   stdout:   "",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -838,6 +909,7 @@ default:
   exit
 "#,
   args:     ("--quiet"),
+  stdin:    "",
   stdout:   "",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -850,6 +922,7 @@ default:
   exit 100
 "#,
   args:     ("--quiet"),
+  stdin:    "",
   stdout:   "",
   stderr:   "",
   status:   100,
@@ -863,6 +936,7 @@ default:
   exit 100
 "#,
   args:     ("--quiet"),
+  stdin:    "",
   stdout:   "",
   stderr:   "",
   status:   100,
@@ -876,6 +950,7 @@ default:
   exit 100
 "#,
   args:     ("--quiet"),
+  stdin:    "",
   stdout:   "",
   stderr:   "",
   status:   100,
@@ -888,6 +963,7 @@ foo A:
   echo {{A}}
     ",
   args:     ("foo", "ARGUMENT"),
+  stdin:    "",
   stdout:   "ARGUMENT\n",
   stderr:   "echo ARGUMENT\n",
   status:   EXIT_SUCCESS,
@@ -900,6 +976,7 @@ foo A B:
   echo A:{{A}} B:{{B}}
     ",
   args:     ("foo", "ONE", "TWO"),
+  stdin:    "",
   stdout:   "A:ONE B:TWO\n",
   stderr:   "echo A:ONE B:TWO\n",
   status:   EXIT_SUCCESS,
@@ -912,6 +989,7 @@ foo A B:
   echo A:{{A}} B:{{B}}
     ",
   args:     ("foo", "ONE", "TWO", "THREE"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Justfile does not contain recipe `THREE`.\n",
   status:   EXIT_FAILURE,
@@ -924,6 +1002,7 @@ foo A B:
   echo A:{{A}} B:{{B}}
     ",
   args:     ("foo", "ONE"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `foo` got 1 argument but takes 2\nusage:\n    just foo A B\n",
   status:   EXIT_FAILURE,
@@ -936,6 +1015,7 @@ foo A B='B':
   echo A:{{A}} B:{{B}}
     ",
   args:     ("foo", "ONE", "TWO", "THREE"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Justfile does not contain recipe `THREE`.\n",
   status:   EXIT_FAILURE,
@@ -948,6 +1028,7 @@ foo A B C='C':
   echo A:{{A}} B:{{B}} C:{{C}}
     ",
   args:     ("foo", "bar"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `foo` got 1 argument but takes at least 2\nusage:\n    just foo A B C='C'\n",
   status:   EXIT_FAILURE,
@@ -957,6 +1038,7 @@ integration_test! {
   name:     unknown_recipe,
   justfile: "hello:",
   args:     ("foo"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Justfile does not contain recipe `foo`.\n",
   status:   EXIT_FAILURE,
@@ -966,6 +1048,7 @@ integration_test! {
   name:     unknown_recipes,
   justfile: "hello:",
   args:     ("foo", "bar"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Justfile does not contain recipes `foo` or `bar`.\n",
   status:   EXIT_FAILURE,
@@ -975,6 +1058,7 @@ integration_test! {
   name:     color_always,
   justfile: "b = a\na = `exit 100`\nbar:\n echo '{{`exit 200`}}'",
   args:     ("--color", "always"),
+  stdin:    "",
   stdout:   "",
   stderr:   "\u{1b}[1;31merror:\u{1b}[0m \u{1b}[1mBacktick failed with exit code 100
 \u{1b}[0m  |\n2 | a = `exit 100`\n  |     \u{1b}[1;31m^^^^^^^^^^\u{1b}[0m\n",
@@ -985,6 +1069,7 @@ integration_test! {
   name:     color_never,
   justfile: "b = a\na = `exit 100`\nbar:\n echo '{{`exit 200`}}'",
   args:     ("--color", "never"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 100
   |
@@ -998,6 +1083,7 @@ integration_test! {
   name:     color_auto,
   justfile: "b = a\na = `exit 100`\nbar:\n echo '{{`exit 200`}}'",
   args:     ("--color", "auto"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Backtick failed with exit code 100
   |
@@ -1013,6 +1099,7 @@ integration_test! {
 recipe:
   @exit 100",
   args:     ("--color=always"),
+  stdin:    "",
   stdout:   "",
   stderr:   "\u{1b}[1;31merror:\u{1b}[0m \u{1b}[1m\
 Recipe `recipe` failed on line 3 with exit code 100\u{1b}[0m\n",
@@ -1026,6 +1113,7 @@ integration_test! {
 recipe a b +d:
  @exit 100"#,
   args:     ("--dump"),
+  stdin:    "",
   stdout:   "# this recipe does something
 recipe a b +d:
     @exit 100
@@ -1038,6 +1126,7 @@ integration_test! {
   name:     mixed_whitespace,
   justfile: "bar:\n\t echo hello",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Found a mix of tabs and spaces in leading whitespace: `␉␠`
 Leading whitespace may consist of tabs or spaces, but not both
@@ -1052,6 +1141,7 @@ integration_test! {
   name:     extra_leading_whitespace,
   justfile: "bar:\n\t\techo hello\n\t\t\techo goodbye",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe line has extra leading whitespace
   |
@@ -1065,6 +1155,7 @@ integration_test! {
   name:     inconsistent_leading_whitespace,
   justfile: "bar:\n\t\techo hello\n\t echo goodbye",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe line has inconsistent leading whitespace. \
             Recipe started with `␉␉` but found line with `␉␠`
@@ -1079,6 +1170,7 @@ integration_test! {
   name:     required_after_default,
   justfile: "bar:\nhello baz arg='foo' bar:",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Non-default parameter `bar` follows default parameter
   |
@@ -1092,6 +1184,7 @@ integration_test! {
   name:     required_after_variadic,
   justfile: "bar:\nhello baz +arg bar:",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Parameter `bar` follows variadic parameter
   |
@@ -1109,6 +1202,7 @@ hello baz arg="XYZ\t\"	":
   echo '{{baz}}...{{arg}}'
 "#,
   args:     ("hello", "ABC"),
+  stdin:    "",
   stdout:   "ABC...XYZ\t\"\t\n",
   stderr:   "echo 'ABC...XYZ\t\"\t'\n",
   status:   EXIT_SUCCESS,
@@ -1122,6 +1216,7 @@ hello baz arg='XYZ"	':
   printf '{{baz}}...{{arg}}'
 "#,
   args:     ("hello", "ABC"),
+  stdin:    "",
   stdout:   "ABC...XYZ\"\t",
   stderr:   "printf 'ABC...XYZ\"\t'\n",
   status:   EXIT_SUCCESS,
@@ -1134,6 +1229,7 @@ hello a b='B' c='C':
   echo {{a}} {{b}} {{c}}
 "#,
   args:     ("hello", "0", "1"),
+  stdin:    "",
   stdout:   "0 1 C\n",
   stderr:   "echo 0 1 C\n",
   status:   EXIT_SUCCESS,
@@ -1146,6 +1242,7 @@ hello a b='B' c='C':
   echo {{a}} {{b}} {{c}}
 "#,
   args:     ("hello", "0", "1", "2"),
+  stdin:    "",
   stdout:   "0 1 2\n",
   stderr:   "echo 0 1 2\n",
   status:   EXIT_SUCCESS,
@@ -1167,6 +1264,7 @@ a Z="\t z":
 _private-recipe:
 "#,
   args:     ("--list"),
+  stdin:    "",
   stdout:   r#"Available recipes:
     a Z="\t z"
     hello a b='B	' c='C' # this does a thing
@@ -1190,6 +1288,7 @@ a Z="\t z":
 _private-recipe:
 "#,
   args:     ("--list"),
+  stdin:    "",
   stdout:   r#"Available recipes:
     a Z="\t z"          # something else
     hello a b='B	' c='C' # this does a thing
@@ -1217,6 +1316,7 @@ this-recipe-is-very-very-very-important Z="\t z":
 _private-recipe:
 "#,
   args:     ("--list"),
+  stdin:    "",
   stdout:   r#"Available recipes:
     hello a b='B	' c='C' # this does a thing
     this-recipe-is-very-very-very-important Z="\t z" # something else
@@ -1235,6 +1335,7 @@ hello a b='B	' c='C':
 a Z="\t z":
 "#,
   args:     ("--show", "hell"),
+  stdin:    "",
   stdout:   "",
   stderr:   "Justfile does not contain recipe `hell`.\nDid you mean `hello`?\n",
   status:   EXIT_FAILURE,
@@ -1249,6 +1350,7 @@ helloooooo a b='B	' c='C':
 a Z="\t z":
 "#,
   args:     ("--show", "hell"),
+  stdin:    "",
   stdout:   "",
   stderr:   "Justfile does not contain recipe `hell`.\n",
   status:   EXIT_FAILURE,
@@ -1263,6 +1365,7 @@ hello a b='B	' c='C':
 a Z="\t z":
 "#,
   args:     ("hell"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Justfile does not contain recipe `hell`.\nDid you mean `hello`?\n",
   status:   EXIT_FAILURE,
@@ -1277,6 +1380,7 @@ foo:
              c
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "a b c\n",
   stderr:   "echo a       b             c\n",
   status:   EXIT_SUCCESS,
@@ -1291,6 +1395,7 @@ foo:
              c'
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "a       b             c\n",
   stderr:   "echo 'a       b             c'\n",
   status:   EXIT_SUCCESS,
@@ -1305,6 +1410,7 @@ foo:
   c
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "abc\n",
   stderr:   "echo abc\n",
   status:   EXIT_SUCCESS,
@@ -1317,6 +1423,7 @@ foo:
   echo {{arch()}} {{os()}} {{os_family()}}
 "#,
   args:     (),
+  stdin:    "",
   stdout:   format!("{} {} {}\n", target::arch(), target::os(), target::os_family()).as_str(),
   stderr:   format!("echo {} {} {}\n", target::arch(), target::os(), target::os_family()).as_str(),
   status:   EXIT_SUCCESS,
@@ -1333,6 +1440,7 @@ foo:
   echo {{a}} {{o}} {{f}}
 "#,
   args:     (),
+  stdin:    "",
   stdout:   format!("{} {} {}\n", target::arch(), target::os(), target::os_family()).as_str(),
   stderr:   format!("echo {} {} {}\n", target::arch(), target::os(), target::os_family()).as_str(),
   status:   EXIT_SUCCESS,
@@ -1350,6 +1458,7 @@ foo:
   /bin/echo '{{p}}' '{{b}}' '{{x}}'
 "#,
   args:     (),
+  stdin:    "",
   stdout:   format!("{} HTAP ABC\n", env::var("USER").unwrap()).as_str(),
   stderr:   format!("/bin/echo '{}' 'HTAP' 'ABC'\n", env::var("USER").unwrap()).as_str(),
   status:   EXIT_SUCCESS,
@@ -1367,6 +1476,7 @@ foo:
   /bin/echo '{{p}}' '{{b}}' '{{x}}'
 "#,
   args:     (),
+  stdin:    "",
   stdout:   format!("{} HTAP ABC\n", env::var("USERNAME").unwrap()).as_str(),
   stderr:   format!("/bin/echo '{}' 'HTAP' 'ABC'\n", env::var("USERNAME").unwrap()).as_str(),
   status:   EXIT_SUCCESS,
@@ -1376,6 +1486,7 @@ integration_test! {
   name:     env_var_failure,
   justfile: "a:\n  echo {{env_var('ZADDY')}}",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Call to function `env_var` failed: environment variable `ZADDY` not present
   |
@@ -1394,6 +1505,7 @@ integration_test! {
   @echo c
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "c\n",
   stderr:   "echo c\n",
   status:   EXIT_SUCCESS,
@@ -1407,6 +1519,7 @@ integration_test! {
   echo hello
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "hello\n",
   stderr:   "#!/bin/sh\necho hello\n",
   status:   EXIT_SUCCESS,
@@ -1428,6 +1541,7 @@ quiet:
 
 "#,
   args:     (),
+  stdin:    "",
   stdout:   "#!/usr/bin/env cat
 
 
@@ -1451,6 +1565,7 @@ b:
 c: b a
 "#,
   args:     ("b"),
+  stdin:    "",
   stdout:   "",
   stderr:   "",
   status:   EXIT_SUCCESS,
@@ -1460,6 +1575,7 @@ integration_test! {
   name:     parameter_shadows_variable,
   justfile: "FOO = 'hello'\na FOO:",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Parameter `FOO` shadows variable of the same name
   |
@@ -1474,6 +1590,7 @@ integration_test! {
   justfile: r#"foo = foo() + "hello"
 bar:"#,
   args:     ("bar"),
+  stdin:    "",
   stdout:   "",
   stderr:   r#"error: Call to unknown function `foo`
   |
@@ -1487,6 +1604,7 @@ integration_test! {
   name:     dependency_takes_arguments,
   justfile: "b: a\na FOO:",
   args:     ("b"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `b` depends on `a` which requires arguments. \
              Dependencies may not require arguments
@@ -1501,6 +1619,7 @@ integration_test! {
   name:     duplicate_parameter,
   justfile: "a foo foo:",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `a` has duplicate parameter `foo`
   |
@@ -1514,6 +1633,7 @@ integration_test! {
   name:     duplicate_dependency,
   justfile: "b:\na: b b",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `a` has duplicate dependency `b`
   |
@@ -1527,6 +1647,7 @@ integration_test! {
   name:     duplicate_recipe,
   justfile: "b:\nb:",
   args:     ("b"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `b` first defined on line 1 is redefined on line 2
   |
@@ -1540,6 +1661,7 @@ integration_test! {
   name:     duplicate_variable,
   justfile: "a = 'hello'\na = 'hello'\nfoo:",
   args:     ("foo"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variable `a` has multiple definitions
   |
@@ -1553,6 +1675,7 @@ integration_test! {
   name:     unexpected_token_in_dependency_position,
   justfile: "foo: 'bar'",
   args:     ("foo"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Expected name, end of line, or end of file, but found raw string
   |
@@ -1566,6 +1689,7 @@ integration_test! {
   name:     unexpected_token_after_name,
   justfile: "foo 'bar'",
   args:     ("foo"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Expected name, '+', ':', or '=', but found raw string
   |
@@ -1579,6 +1703,7 @@ integration_test! {
   name:     self_dependency,
   justfile: "a: a",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `a` depends on itself
   |
@@ -1592,6 +1717,7 @@ integration_test! {
   name:     long_circular_recipe_dependency,
   justfile: "a: b\nb: c\nc: d\nd: a",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `d` has circular dependency `a -> b -> c -> d -> a`
   |
@@ -1605,6 +1731,7 @@ integration_test! {
   name:     variable_self_dependency,
   justfile: "z = z\na:",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variable `z` is defined in terms of itself
   |
@@ -1618,6 +1745,7 @@ integration_test! {
   name:     variable_circular_dependency,
   justfile: "x = y\ny = z\nz = x\na:",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variable `x` depends on its own value: `x -> y -> z -> x`
   |
@@ -1632,6 +1760,7 @@ integration_test! {
   justfile: r#"x = "\q"
 a:"#,
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: `\\q` is not a valid escape sequence
   |
@@ -1651,6 +1780,7 @@ a:
   echo '{{string}}'
 ",
   args:     ("a"),
+  stdin:    "",
   stdout:   "hello
 whatever
 ",
@@ -1671,6 +1801,7 @@ a:
   echo '{{foo}}'
 ",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variable `foo` not defined
   |
@@ -1691,6 +1822,7 @@ a:
   echo '{{string}}'
 ",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variable `bar` not defined
   |
@@ -1708,6 +1840,7 @@ a:
   ' + "b"}}'
 "#,
   args:     ("a"),
+  stdin:    "",
   stdout:   "a
   b
 ",
@@ -1727,6 +1860,7 @@ a:
   echo {{b}}
 "#,
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Variable `b` not defined
   |
@@ -1742,6 +1876,7 @@ integration_test! {
 a b= ':
 ",
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Unterminated string
   |
@@ -1757,6 +1892,7 @@ integration_test! {
 a b= ":
 "#,
   args:     ("a"),
+  stdin:    "",
   stdout:   "",
   stderr:   r#"error: Unterminated string
   |
@@ -1773,6 +1909,7 @@ a x y +z:
   echo {{x}} {{y}} {{z}}
 ",
   args:     ("a", "0", "1", "2", "3", " 4 "),
+  stdin:    "",
   stdout:   "0 1 2 3 4\n",
   stderr:   "echo 0 1 2 3  4 \n",
   status:   EXIT_SUCCESS,
@@ -1785,6 +1922,7 @@ a x y +z='HELLO':
   echo {{x}} {{y}} {{z}}
 ",
   args:     ("a", "0", "1", "2", "3", " 4 "),
+  stdin:    "",
   stdout:   "0 1 2 3 4\n",
   stderr:   "echo 0 1 2 3  4 \n",
   status:   EXIT_SUCCESS,
@@ -1797,6 +1935,7 @@ a x y +z='HELLO':
   echo {{x}} {{y}} {{z}}
 ",
   args:     ("a", "0", "1"),
+  stdin:    "",
   stdout:   "0 1 HELLO\n",
   stderr:   "echo 0 1 HELLO\n",
   status:   EXIT_SUCCESS,
@@ -1809,6 +1948,7 @@ a x y +z:
   echo {{x}} {{y}} {{z}}
 ",
   args:     ("a", "0", "1"),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `a` got 2 arguments but takes at least 3\nusage:\n    just a x y +z\n",
   status:   EXIT_FAILURE,
@@ -1827,6 +1967,7 @@ BAZ +Z:
   echo baz: {{Z}}
 ",
   args:     ("BAR", "0", "FOO", "1", "2", "BAZ", "3", "4", "5"),
+  stdin:    "",
   stdout:   "bar: 0\nfoo: 1 2\nbaz: 3 4 5\n",
   stderr:   "echo bar: 0\necho foo: 1 2\necho baz: 3 4 5\n",
   status:   EXIT_SUCCESS,
@@ -1840,6 +1981,7 @@ x:
 a: x y
 ",
   args:     (),
+  stdin:    "",
   stdout:   "",
   stderr:   "error: Recipe `a` has unknown dependency `y`
   |
@@ -1857,6 +1999,7 @@ a B C +D='hello':
   echo {{B}} {{C}} {{D}}
 ",
   args:     ("--color", "always", "--list"),
+  stdin:    "",
   stdout:   "Available recipes:\n    a \
     \u{1b}[36mB\u{1b}[0m \u{1b}[36mC\u{1b}[0m \u{1b}[35m+\
     \u{1b}[0m\u{1b}[36mD\u{1b}[0m=\u{1b}[32m'hello'\u{1b}[0m \
@@ -1873,6 +2016,7 @@ a:
   echo hi
 ",
   args:     ("--color", "always", "--highlight", "--verbose"),
+  stdin:    "",
   stdout:   "hi\n",
   stderr:   "\u{1b}[1;36m===> Running recipe `a`...\u{1b}[0m\n\u{1b}[1mecho hi\u{1b}[0m\n",
   status:   EXIT_SUCCESS,
@@ -1885,6 +2029,7 @@ echo A B C:
   echo {{A}} {{B}} {{C}}
 ",
   args:     ("echo", "--some", "--awesome", "--flags"),
+  stdin:    "",
   stdout:   "--some --awesome --flags\n",
   stderr:   "echo --some --awesome --flags\n",
   status:   EXIT_SUCCESS,
@@ -1899,6 +2044,7 @@ echo:
   echo {{A}}
  ",
    args:     ("echo"),
+   stdin:    "",
    stdout:   "1\n",
    stderr:   "echo 1\n",
    status:   EXIT_SUCCESS,
@@ -1912,6 +2058,7 @@ echo:
   echo $DOTENV_KEY
  ",
    args:     (),
+   stdin:    "",
    stdout:   "dotenv-value\n",
    stderr:   "echo $DOTENV_KEY\n",
    status:   EXIT_SUCCESS,
@@ -1926,6 +2073,7 @@ echo:
   echo {{X}}
  ",
    args:     (),
+   stdin:    "",
    stdout:   "dotenv-value\n",
    stderr:   "echo dotenv-value\n",
    status:   EXIT_SUCCESS,
@@ -1939,6 +2087,7 @@ echo:
   echo {{env_var('DOTENV_KEY')}}
  ",
    args:     (),
+   stdin:    "",
    stdout:   "dotenv-value\ndotenv-value\n",
    stderr:   "echo dotenv-value\necho dotenv-value\n",
    status:   EXIT_SUCCESS,
@@ -1955,6 +2104,7 @@ echo:
   echo {{Y}}
  ",
    args:     (),
+   stdin:    "",
    stdout:   "dotenv-value\ndotenv-value\n",
    stderr:   "echo dotenv-value\necho dotenv-value\n",
    status:   EXIT_SUCCESS,
@@ -1966,6 +2116,7 @@ integration_test! {
 X = "\'"
 "#,
    args:     (),
+   stdin:    "",
    stdout:   "",
    stderr:   r#"error: `\'` is not a valid escape sequence
   |
@@ -1981,6 +2132,7 @@ integration_test! {
 foo x=bar:
 ",
    args:     (),
+   stdin:    "",
    stdout:   "",
    stderr:   r#"error: Variable `bar` not defined
   |
@@ -1996,6 +2148,7 @@ integration_test! {
 foo x=bar():
 ",
    args:     (),
+   stdin:    "",
    stdout:   "",
    stderr:   r#"error: Call to unknown function `bar`
   |
@@ -2012,6 +2165,7 @@ foo x='bar':
   echo {{x}}
 ",
    args:     (),
+   stdin:    "",
    stdout:   "bar\n",
    stderr:   "echo bar\n",
    status:   EXIT_SUCCESS,
@@ -2024,6 +2178,7 @@ foo x=(`echo foo` + 'bar'):
   echo {{x}}
 ",
    args:     (),
+   stdin:    "",
    stdout:   "foobar\n",
    stderr:   "echo foobar\n",
    status:   EXIT_SUCCESS,
@@ -2036,6 +2191,7 @@ foo x=`echo foo`:
   echo {{x}}
 ",
    args:     (),
+   stdin:    "",
    stdout:   "foo\n",
    stderr:   "echo foo\n",
    status:   EXIT_SUCCESS,
@@ -2049,6 +2205,7 @@ foo x=y:
   echo {{x}}
 ",
    args:     (),
+   stdin:    "",
    stdout:   "foo\n",
    stderr:   "echo foo\n",
    status:   EXIT_SUCCESS,
@@ -2061,6 +2218,7 @@ foo a=arch() o=os() f=os_family():
   echo {{a}} {{o}} {{f}}
 "#,
   args:     (),
+  stdin:    "",
   stdout:   format!("{} {} {}\n", target::arch(), target::os(), target::os_family()).as_str(),
   stderr:   format!("echo {} {} {}\n", target::arch(), target::os(), target::os_family()).as_str(),
   status:   EXIT_SUCCESS,
@@ -2073,6 +2231,7 @@ foo:
   echo {{
 ",
    args:     (),
+   stdin:    "",
    stdout:   "",
    stderr:   r#"error: Unterminated interpolation
   |
@@ -2088,6 +2247,7 @@ integration_test! {
 foo:
   echo {{",
    args:     (),
+   stdin:    "",
    stdout:   "",
    stderr:   r#"error: Unterminated interpolation
   |
@@ -2103,6 +2263,7 @@ integration_test! {
 foo a=\t`echo blaaaaaah:
   echo {{a}}",
    args:     (),
+   stdin:    "",
    stdout:   "",
    stderr:   r#"error: Unterminated backtick
   |
@@ -2118,6 +2279,7 @@ integration_test! {
 assembly_source_files = $(wildcard src/arch/$(arch)/*.s)
 ",
    args:     (),
+   stdin:    "",
    stdout:   "",
    stderr:   r#"error: Unknown start of token:
   |
@@ -2126,3 +2288,96 @@ assembly_source_files = $(wildcard src/arch/$(arch)/*.s)
 "#,
    status:   EXIT_FAILURE,
 }
+
+integration_test! {
+   name:     backtick_variable_cat,
+   justfile: "
+stdin = `cat`
+
+default:
+  echo {{stdin}}
+",
+   args:     (),
+   stdin:    "STDIN",
+   stdout:   "STDIN\n",
+   stderr:   "echo STDIN\n",
+   status:   EXIT_SUCCESS,
+}
+
+integration_test! {
+   name:     backtick_default_cat_stdin,
+   justfile: "
+default stdin = `cat`:
+  echo {{stdin}}
+",
+   args:     (),
+   stdin:    "STDIN",
+   stdout:   "STDIN\n",
+   stderr:   "echo STDIN\n",
+   status:   EXIT_SUCCESS,
+}
+
+integration_test! {
+   name:     backtick_default_cat_justfile,
+   justfile: "
+default stdin = `cat justfile`:
+  echo '{{stdin}}'
+",
+   args:     (),
+   stdin:    "",
+   stdout:   "
+default stdin = `cat justfile`:
+  echo {{stdin}}
+",
+   stderr:   "echo '
+default stdin = `cat justfile`:
+  echo '{{stdin}}''\n",
+   status:   EXIT_SUCCESS,
+}
+
+integration_test! {
+   name:     backtick_variable_read_single,
+   justfile: "
+password = `read PW && echo $PW`
+
+default:
+  echo {{password}}
+",
+   args:     (),
+   stdin:    "foobar\n",
+   stdout:   "foobar\n",
+   stderr:   "echo foobar\n",
+   status:   EXIT_SUCCESS,
+}
+
+integration_test! {
+   name:     backtick_variable_read_multiple,
+   justfile: "
+a = `read A && echo $A`
+b = `read B && echo $B`
+
+default:
+  echo {{a}}
+  echo {{b}}
+",
+   args:     (),
+   stdin:    "foo\nbar\n",
+   stdout:   "foo\nbar\n",
+   stderr:   "echo foo\necho bar\n",
+   status:   EXIT_SUCCESS,
+}
+
+integration_test! {
+   name:     backtick_default_read_multiple,
+   justfile: "
+
+default a=`read A && echo $A` b=`read B && echo $B`:
+  echo {{a}}
+  echo {{b}}
+",
+   args:     (),
+   stdin:    "foo\nbar\n",
+   stdout:   "foo\nbar\n",
+   stderr:   "echo foo\necho bar\n",
+   status:   EXIT_SUCCESS,
+}