Attribute shorthand

- Bump version: 1.27.0 → 1.28.0
- Update changelog
- Update changelog contributor credits
- Update dependencies

.github/workflows/release.yaml

@@ -73,13 +73,15 @@ jobs:
       id: ref-type
       run: cargo run --package ref-type -- --reference ${{ github.ref }} >> $GITHUB_OUTPUT
 
-    - name: Generate Completion Scripts
+    - name: Generate Completion Scripts and Manpage
       run: |
         set -euxo pipefail
         cargo build
         for shell in bash elvish fish powershell zsh; do
           ./target/debug/just --completions $shell > completions/just.$shell
         done
+        mkdir -p man
+        ./target/debug/just --man > man/just.1
 
     - name: Package
       id: package

.gitignore

@@ -10,6 +10,7 @@
 /fuzz/artifacts
 /fuzz/corpus
 /fuzz/target
+/man
 /target
 /test-utilities/Cargo.lock
 /test-utilities/target

CHANGELOG.md

@@ -1,6 +1,40 @@
 Changelog
 =========
 
+[1.28.0](https://github.com/casey/just/releases/tag/1.28.0) - 2024-06-05
+------------------------------------------------------------------------
+
+### Changed
+- Write shebang recipes to $XDG_RUNTIME_DIR ([#2128](https://github.com/casey/just/pull/2128))
+- Add `set dotenv-required` to require an environment file ([#2116](https://github.com/casey/just/pull/2116))
+- Don't display submodule recipes in `--list` ([#2112](https://github.com/casey/just/pull/2112))
+
+### Added
+- Allow listing recipes in submodules with `--list-submodules` ([#2113](https://github.com/casey/just/pull/2113))
+- Show recipes in submodules with `--show RECIPE::PATH` ([#2111](https://github.com/casey/just/pull/2111))
+- Add `--timestamp-format` ([#2106](https://github.com/casey/just/pull/2106) by [neunenak](https://github.com/neunenak))
+- Allow listing submodule recipes with `--list PATH` ([#2108](https://github.com/casey/just/pull/2108))
+- Print recipe command timestamps with `--timestamps` ([#2084](https://github.com/casey/just/pull/2084) by [neunenak](https://github.com/neunenak))
+- Add `module_file()` and `module_directory()` functions ([#2105](https://github.com/casey/just/pull/2105))
+
+### Fixed
+- Use space-separated recipe paths in `--choose` ([#2115](https://github.com/casey/just/pull/2115))
+- Fix bash completion for aliases ([#2104](https://github.com/casey/just/pull/2104) by [laniakea64](https://github.com/laniakea64))
+
+### Misc
+- Don't check in manpage ([#2130](https://github.com/casey/just/pull/2130))
+- Document default shell ([#2129](https://github.com/casey/just/pull/2129))
+- Remove duplicate section in Chinese readme ([#2127](https://github.com/casey/just/pull/2127) by [potterxu](https://github.com/potterxu))
+- Update Chinese readme ([#2124](https://github.com/casey/just/pull/2124) by [potterxu](https://github.com/potterxu))
+- Fix typo in readme ([#2122](https://github.com/casey/just/pull/2122) by [potterxu](https://github.com/potterxu))
+- Don't check in auto-generated completion scripts ([#2120](https://github.com/casey/just/pull/2120))
+- Document when dependencies run in readme ([#2103](https://github.com/casey/just/pull/2103))
+- Build aarch64-pc-windows-msvc release binaries ([#2100](https://github.com/casey/just/pull/2100) by [alshdavid](https://github.com/alshdavid))
+- Clarify that `dotenv-path`-given env file is required ([#2099](https://github.com/casey/just/pull/2099))
+- Print multi-line doc comments before recipe in `--list` ([#2090](https://github.com/casey/just/pull/2090))
+- List unsorted imported recipes by import depth and offset ([#2092](https://github.com/casey/just/pull/2092))
+- Update README.md ([#2091](https://github.com/casey/just/pull/2091) by [laniakea64](https://github.com/laniakea64))
+
 [1.27.0](https://github.com/casey/just/releases/tag/1.27.0) - 2024-05-25
 ------------------------------------------------------------------------
 

Cargo.lock

@@ -67,9 +67,9 @@ dependencies = [
 
 [[package]]
 name = "anstyle-query"
-version = "1.0.3"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a64c907d4e79225ac72e2a354c9ce84d50ebb4586dee56c82b3ee73004f537f5"
+checksum = "ad186efb764318d35165f1758e7dcef3b10628e26d41a44bc5550652e6804391"
 dependencies = [
  "windows-sys 0.52.0",
 ]
@@ -505,12 +505,6 @@ dependencies = [
  "unicode-segmentation",
 ]
 
-[[package]]
-name = "heck"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
-
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -593,7 +587,7 @@ dependencies = [
 
 [[package]]
 name = "just"
-version = "1.27.0"
+version = "1.28.0"
 dependencies = [
  "ansi_term",
  "blake3",
@@ -782,9 +776,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b33eb56c327dec362a9e55b3ad14f9d2f0904fb5a5b03b513ab5465399e9f43"
+checksum = "22244ce15aa966053a896d1accb3a6e68469b97c7f33f284b99f0d576879fc23"
 dependencies = [
  "unicode-ident",
 ]
@@ -963,18 +957,18 @@ checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
 
 [[package]]
 name = "serde"
-version = "1.0.202"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "226b61a0d411b2ba5ff6d7f73a476ac4f8bb900373459cd00fab8512828ba395"
+checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.202"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6048858004bcff69094cd972ed40a32500f153bd3be9f716b2eed2e8217c4838"
+checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1090,11 +1084,11 @@ dependencies = [
 
 [[package]]
 name = "strum_macros"
-version = "0.26.2"
+version = "0.26.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6cf59daf282c0a494ba14fd21610a0325f9f90ec9d1231dea26bcb1d696c946"
+checksum = "4c6bee85a5a24955dc440386795aa378cd9cf82acd5f764469152d2270e581be"
 dependencies = [
- "heck 0.4.1",
+ "heck 0.5.0",
  "proc-macro2",
  "quote",
  "rustversion",
@@ -1125,9 +1119,9 @@ dependencies = [
 
 [[package]]
 name = "target"
-version = "2.0.1"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4df6b0340c7cc29eb3b955cc588d145ed60651bf1ab939083295d19ec8cc282"
+checksum = "1e8f05f774b2db35bdad5a8237a90be1102669f8ea013fea9777b366d34ab145"
 
 [[package]]
 name = "tempfile"
@@ -1224,9 +1218,9 @@ checksum = "d4c87d22b6e3f4a18d4d40ef354e97c90fcb14dd91d7dc0aa9d8a1172ebf7202"
 
 [[package]]
 name = "unicode-width"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68f5e5f3158ecfd4b8ff6fe086db7c8467a2dfdac97fe420f2b7c4aa97af66d6"
+checksum = "0336d538f7abc86d282a4189614dfaa90810dfc2c6f6427eaf88e16311dd225d"
 
 [[package]]
 name = "update-contributors"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "just"
-version = "1.27.0"
+version = "1.28.0"
 authors = ["Casey Rodarmor <casey@rodarmor.com>"]
 autotests = false
 categories = ["command-line-utilities", "development-tools"]

README.md

@@ -999,7 +999,7 @@ $ just test foo "bar baz"
 #### Shell
 
 The `shell` setting controls the command used to invoke recipe lines and
-backticks. Shebang recipes are unaffected.
+backticks. Shebang recipes are unaffected. The default shell is `sh -cu`.
 
 ```just
 # use python3 to execute recipe lines and backticks
@@ -1785,7 +1785,7 @@ js-lint:
 [group('rust recipes')]
 [group('lint')]
 rust-lint:
-    echo 'Runninng Rust linter…'
+    echo 'Running Rust linter…'
 
 [group('lint')]
 cpp-lint:
@@ -2053,6 +2053,23 @@ a $A $B=`echo $A`:
 When [export](#export) is set, all `just` variables are exported as environment
 variables.
 
+#### Unexporting Environment Variables<sup>master</sup>
+
+Environment variables can be unexported with the `unexport keyword`:
+
+```just
+unexport FOO
+
+@foo:
+  echo $FOO
+```
+
+```
+$ export FOO=bar
+$ just foo
+sh: FOO: unbound variable
+```
+
 #### Getting Environment Variables from the environment
 
 Environment variables from the environment are passed automatically to the
@@ -3673,7 +3690,6 @@ Release x.y.z
 - Update changelog
 - Update changelog contributor credits
 - Update dependencies
-- Update man page
 - Update version references in readme
 ```
 

README.中文.md

@@ -50,7 +50,7 @@ Yay, all your tests passed!
 
 - 错误会尽可能被静态地解决。未知的配方和循环依赖关系会在运行之前被报告。
 
-- `just` 可以 [加载`.env`文件](#env-集成)，简化环境变量注入。
+- `just` 可以 [加载`.env`文件](#环境变量加载)，简化环境变量注入。
 
 - 配方可以在 [命令行中列出](#列出可用的配方)。
 
@@ -641,18 +641,22 @@ foo:
 
 #### 设置一览表
 
-| 名称                      | 值                 | 默认    | 描述                                                                           |
+| 名称                        | 值                 | 默认  | 描述                                                                                    |
-| ------------------------- | ------------------ | --------|------------------------------------------------------------------------------- |
+| --------------------------- | ------------------ | ----- | --------------------------------------------------------------------------------------- |
-| `allow-duplicate-recipes` | boolean            | False   | 允许在 `justfile` 后面出现的配方覆盖之前的同名配方                             |
+| `allow-duplicate-recipes`   | boolean            | False | 允许在 `justfile` 后面出现的配方覆盖之前的同名配方                                      |
-| `dotenv-load`             | boolean            | False   | 如果有`.env` 环境变量文件的话，则将其加载                                      |
+| `allow-duplicate-variables` | boolean            | False | 允许在 `justfile` 后面出现的变量覆盖之前的同名变量                                      |
-| `export`                  | boolean            | False   | 将所有变量导出为环境变量                                                       |
+| `dotenv-filename`           | string             | -     | 如果有自定义名称的 `.env` 环境变量文件的话，则将其加载                                  |
-| `fallback`                | boolean            | False   | 如果命令行中的第一个配方没有找到，则在父目录中搜索 `justfile`                  |
+| `dotenv-load`               | boolean            | False | 如果有`.env` 环境变量文件的话，则将其加载                                               |
-| `ignore-comments`         | boolean            | False   | 忽略以`#`开头的配方行                                                          |
+| `dotenv-path`               | string             | -     | 从自定义路径中加载 `.env` 环境变量文件， 文件不存在将会报错。可以覆盖 `dotenv-filename` |
-| `positional-arguments`    | boolean            | False   | 传递位置参数                                                                   |
+| `dotenv-required`           | boolean            | False | 如果 `.env` 环境变量文件不存在的话，需要报错                                                         |
-| `shell`                   | `[COMMAND, ARGS…]` | -       | 设置用于调用配方和评估反引号内包裹内容的命令                                   |
+| `export`                    | boolean            | False | 将所有变量导出为环境变量                                                                |
-| `tempdir`                 | string             | -       | 在 `tempdir` 位置创建临时目录，而不是系统默认的临时目录                        |
+| `fallback`                  | boolean            | False | 如果命令行中的第一个配方没有找到，则在父目录中搜索 `justfile`                           |
-| `windows-powershell`      | boolean            | False   | 在 Windows 上使用 PowerShell 作为默认 Shell(废弃，建议使用 `windows-shell`)    |
+| `ignore-comments`           | boolean            | False | 忽略以`#`开头的配方行                                                                   |
-| `windows-shell`           | `[COMMAND, ARGS…]` | -       | 设置用于调用配方和评估反引号内包裹内容的命令                                   |
+| `positional-arguments`      | boolean            | False | 传递位置参数                                                                            |
+| `shell`                     | `[COMMAND, ARGS…]` | -     | 设置用于调用配方和评估反引号内包裹内容的命令                                            |
+| `tempdir`                   | string             | -     | 在 `tempdir` 位置创建临时目录，而不是系统默认的临时目录                                 |
+| `windows-powershell`        | boolean            | False | 在 Windows 上使用 PowerShell 作为默认 Shell(废弃，建议使用 `windows-shell`)             |
+| `windows-shell`             | `[COMMAND, ARGS…]` | -     | 设置用于调用配方和评估反引号内包裹内容的命令                                            |
 
 Bool 类型设置可以写成：
 
@@ -685,9 +689,69 @@ $ just foo
 bar
 ```
 
+#### 允许重复的变量
+如果 `allow-duplicate-variables` 被设置为 `true`，那么定义多个同名的变量将不会报错。默认为 `false`。
+
+```just
+set allow-duplicate-variables
+
+a := "foo"
+a := "bar"
+
+@foo:
+  echo $a
+```
+
+```sh
+$ just foo
+bar
+```
+
 #### 环境变量加载
 
-如果将 `dotenv-load` 设置为 `true`，并且存在 `.env` 文件，则该环境配置文件将被加载。默认为 `false`。
+如果 `dotenv-load`, `dotenv-filename`, `dotenv-path`, or `dotenv-required`
+中任意一项被设置, `just` 会尝试从文件中加载环境变量
+
+如果设置了 `dotenv-path`, `just` 会在指定的路径下搜索文件，该路径可以是绝对路径，
+也可以是基于当前工作路径的相对路径
+
+如果设置了 `dotenv-filename`，`just` 会在指定的相对路径，以及其所有的上层目录中，搜索指定文件
+
+如果没有设置 `dotenv-filename`，但是设置了 `dotenv-load` 或 `dotenv-required`，
+`just` 会在当前工作路径，以及其所有的上层目录中，寻找名为 `.env` 的文件。
+
+`dotenv-filename` 和 `dotenv-path` 很相似，但是 `dotenv-path` 只会检查指定的目录
+而 `dotenv-filename` 会检查指定目录以及其所有的上层目录。
+
+如果没有找到环境变量文件也不会报错，除非设置了 `dotenv-required`。
+
+从文件中加载的变量是环境变量，而非 `just` 变量，所以在配方和反引号中需要必须通过 `$VARIABLE_NAME` 来调用。
+
+比如，如果你的 `.env` 文件包含以下内容：
+
+```sh
+# a comment, will be ignored
+DATABASE_ADDRESS=localhost:6379
+SERVER_PORT=1337
+```
+
+并且你的 `justfile` 包含：
+
+```just
+set dotenv-load
+
+serve:
+  @echo "Starting server with database $DATABASE_ADDRESS on port $SERVER_PORT…"
+  ./server --database $DATABASE_ADDRESS --port $SERVER_PORT
+```
+
+`just serve` 将会输出：
+
+```sh
+$ just serve
+Starting server with database localhost:6379 on port 1337…
+./server --database $DATABASE_ADDRESS --port $SERVER_PORT
+```
 
 #### 导出
 
@@ -853,36 +917,6 @@ Available recipes:
     test # test stuff
 ```
 
-### `.env` 集成
-
-如果 [`dotenv-load`](#环境变量加载) 被设置，`just` 将从一个名为 `.env` 的文件中加载环境变量。这个文件可以和你的 `justfile` 位于同一目录下，或者位于其父目录下。这些变量是环境变量，而不是 `just` 的变量，因此必须使用 `$VARIABLE_NAME` 在配方和反引号中访问。
-
-例如，假如你的 `.env` 文件包含：
-
-```sh
-# 注释，将被忽略
-DATABASE_ADDRESS=localhost:6379
-SERVER_PORT=1337
-```
-
-而你的 `justfile` 包含：
-
-```just
-set dotenv-load
-
-serve:
-  @echo "Starting server with database $DATABASE_ADDRESS on port $SERVER_PORT…"
-  ./server --database $DATABASE_ADDRESS --port $SERVER_PORT
-```
-
-`just serve` 将会输出：
-
-```sh
-$ just serve
-Starting server with database localhost:6379 on port 1337…
-./server --database $DATABASE_ADDRESS --port $SERVER_PORT
-```
-
 ### 变量和替换
 
 支持在变量、字符串、拼接、路径连接和替换中使用 `{{…}}` ：
@@ -1463,7 +1497,7 @@ HOME is '/home/myuser'
 
 #### 从 `.env` 文件加载环境变量
 
-如果 [dotenv-load](#环境变量加载) 被设置，`just` 将从 `.env` 文件中加载环境变量。该文件中的变量将作为环境变量提供给配方。参见 [环境变量集成](#env-集成) 以获得更多信息。
+如果 [dotenv-load](#环境变量加载) 被设置，`just` 将从 `.env` 文件中加载环境变量。该文件中的变量将作为环境变量提供给配方。参见 [环境变量集成](#环境变量加载) 以获得更多信息。
 
 #### 从环境变量中设置 `just` 变量
 

justfile

@@ -43,6 +43,7 @@ shellcheck:
   shellcheck www/install.sh
 
 man:
+  mkdir -p man
   cargo run -- --man > man/just.1
 
 view-man: man

man/just.1

@@ -1,195 +0,0 @@
-.ie \n(.g .ds Aq \(aq
-.el .ds Aq '
-.TH just 1  "just 1.27.0" 
-.SH NAME
-just \- 🤖 Just a command runner \- https://github.com/casey/just
-.SH SYNOPSIS
-\fBjust\fR [\fB\-\-check\fR] [\fB\-\-chooser\fR] [\fB\-\-color\fR] [\fB\-\-command\-color\fR] [\fB\-\-yes\fR] [\fB\-n\fR|\fB\-\-dry\-run\fR] [\fB\-\-dump\-format\fR] [\fB\-\-highlight\fR] [\fB\-\-list\-heading\fR] [\fB\-\-list\-prefix\fR] [\fB\-\-no\-aliases\fR] [\fB\-\-no\-deps\fR] [\fB\-\-no\-dotenv\fR] [\fB\-\-no\-highlight\fR] [\fB\-f\fR|\fB\-\-justfile\fR] [\fB\-q\fR|\fB\-\-quiet\fR] [\fB\-\-set\fR] [\fB\-\-shell\fR] [\fB\-\-shell\-arg\fR] [\fB\-\-shell\-command\fR] [\fB\-\-clear\-shell\-args\fR] [\fB\-u\fR|\fB\-\-unsorted\fR] [\fB\-\-unstable\fR] [\fB\-v\fR|\fB\-\-verbose\fR]... [\fB\-d\fR|\fB\-\-working\-directory\fR] [\fB\-\-changelog\fR] [\fB\-\-choose\fR] [\fB\-c\fR|\fB\-\-command\fR] [\fB\-\-completions\fR] [\fB\-\-dump\fR] [\fB\-e\fR|\fB\-\-edit\fR] [\fB\-\-evaluate\fR] [\fB\-\-fmt\fR] [\fB\-\-init\fR] [\fB\-l\fR|\fB\-\-list\fR] [\fB\-\-groups\fR] [\fB\-\-man\fR] [\fB\-s\fR|\fB\-\-show\fR] [\fB\-\-summary\fR] [\fB\-\-variables\fR] [\fB\-\-dotenv\-filename\fR] [\fB\-E\fR|\fB\-\-dotenv\-path\fR] [\fB\-g\fR|\fB\-\-global\-justfile\fR] [\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR] [\fIARGUMENTS\fR] 
-.SH DESCRIPTION
-🤖 Just a command runner \- https://github.com/casey/just
-.SH OPTIONS
-.TP
-\fB\-\-check\fR
-Run `\-\-fmt` in \*(Aqcheck\*(Aq mode. Exits with 0 if justfile is formatted correctly. Exits with 1 and prints a diff if formatting is required.
-.TP
-\fB\-\-chooser\fR
-Override binary invoked by `\-\-choose`
-.RS
-May also be specified with the \fBJUST_CHOOSER\fR environment variable. 
-.RE
-.TP
-\fB\-\-color\fR [default: auto]
-Print colorful output
-.br
-
-.br
-[\fIpossible values: \fRauto, always, never]
-.RS
-May also be specified with the \fBJUST_COLOR\fR environment variable. 
-.RE
-.TP
-\fB\-\-command\-color\fR
-Echo recipe lines in <COMMAND\-COLOR>
-.br
-
-.br
-[\fIpossible values: \fRblack, blue, cyan, green, purple, red, yellow]
-.RS
-May also be specified with the \fBJUST_COMMAND_COLOR\fR environment variable. 
-.RE
-.TP
-\fB\-\-yes\fR
-Automatically confirm all recipes.
-.TP
-\fB\-n\fR, \fB\-\-dry\-run\fR
-Print what just would do without doing it
-.RS
-May also be specified with the \fBJUST_DRY_RUN\fR environment variable. 
-.RE
-.TP
-\fB\-\-dump\-format\fR=\fIFORMAT\fR [default: just]
-Dump justfile as <FORMAT>
-.br
-
-.br
-[\fIpossible values: \fRjust, json]
-.TP
-\fB\-\-highlight\fR
-Highlight echoed recipe lines in bold
-.TP
-\fB\-\-list\-heading\fR=\fITEXT\fR
-Print <TEXT> before list
-.TP
-\fB\-\-list\-prefix\fR=\fITEXT\fR
-Print <TEXT> before each list item
-.TP
-\fB\-\-no\-aliases\fR
-Don\*(Aqt show aliases in list
-.TP
-\fB\-\-no\-deps\fR
-Don\*(Aqt run recipe dependencies
-.TP
-\fB\-\-no\-dotenv\fR
-Don\*(Aqt load `.env` file
-.TP
-\fB\-\-no\-highlight\fR
-Don\*(Aqt highlight echoed recipe lines in bold
-.TP
-\fB\-f\fR, \fB\-\-justfile\fR
-Use <JUSTFILE> as justfile
-.RS
-May also be specified with the \fBJUST_JUSTFILE\fR environment variable. 
-.RE
-.TP
-\fB\-q\fR, \fB\-\-quiet\fR
-Suppress all output
-.RS
-May also be specified with the \fBJUST_QUIET\fR environment variable. 
-.RE
-.TP
-\fB\-\-set\fR=\fIVARIABLE VALUE\fR
-Override <VARIABLE> with <VALUE>
-.TP
-\fB\-\-shell\fR
-Invoke <SHELL> to run recipes
-.TP
-\fB\-\-shell\-arg\fR
-Invoke shell with <SHELL\-ARG> as an argument
-.TP
-\fB\-\-shell\-command\fR
-Invoke <COMMAND> with the shell used to run recipe lines and backticks
-.TP
-\fB\-\-clear\-shell\-args\fR
-Clear shell arguments
-.TP
-\fB\-u\fR, \fB\-\-unsorted\fR
-Return list and summary entries in source order
-.TP
-\fB\-\-unstable\fR
-Enable unstable features
-.RS
-May also be specified with the \fBJUST_UNSTABLE\fR environment variable. 
-.RE
-.TP
-\fB\-v\fR, \fB\-\-verbose\fR
-Use verbose output
-.RS
-May also be specified with the \fBJUST_VERBOSE\fR environment variable. 
-.RE
-.TP
-\fB\-d\fR, \fB\-\-working\-directory\fR
-Use <WORKING\-DIRECTORY> as working directory. \-\-justfile must also be set
-.RS
-May also be specified with the \fBJUST_WORKING_DIRECTORY\fR environment variable. 
-.RE
-.TP
-\fB\-\-changelog\fR
-Print changelog
-.TP
-\fB\-\-choose\fR
-Select one or more recipes to run using a binary chooser. If `\-\-chooser` is not passed the chooser defaults to the value of $JUST_CHOOSER, falling back to `fzf`
-.TP
-\fB\-c\fR, \fB\-\-command\fR
-Run an arbitrary command with the working directory, `.env`, overrides, and exports set
-.TP
-\fB\-\-completions\fR=\fISHELL\fR
-Print shell completion script for <SHELL>
-.br
-
-.br
-[\fIpossible values: \fRbash, elvish, fish, powershell, zsh]
-.TP
-\fB\-\-dump\fR
-Print justfile
-.TP
-\fB\-e\fR, \fB\-\-edit\fR
-Edit justfile with editor given by $VISUAL or $EDITOR, falling back to `vim`
-.TP
-\fB\-\-evaluate\fR
-Evaluate and print all variables. If a variable name is given as an argument, only print that variable\*(Aqs value.
-.TP
-\fB\-\-fmt\fR
-Format and overwrite justfile
-.TP
-\fB\-\-init\fR
-Initialize new justfile in project root
-.TP
-\fB\-l\fR, \fB\-\-list\fR
-List available recipes and their arguments
-.TP
-\fB\-\-groups\fR
-List recipe groups
-.TP
-\fB\-\-man\fR
-Print man page
-.TP
-\fB\-s\fR, \fB\-\-show\fR=\fIRECIPE\fR
-Show information about <RECIPE>
-.TP
-\fB\-\-summary\fR
-List names of available recipes
-.TP
-\fB\-\-variables\fR
-List names of variables
-.TP
-\fB\-\-dotenv\-filename\fR
-Search for environment file named <DOTENV\-FILENAME> instead of `.env`
-.TP
-\fB\-E\fR, \fB\-\-dotenv\-path\fR
-Load <DOTENV\-PATH> as environment file instead of searching for one
-.TP
-\fB\-g\fR, \fB\-\-global\-justfile\fR
-Use global justfile
-.TP
-\fB\-h\fR, \fB\-\-help\fR
-Print help
-.TP
-\fB\-V\fR, \fB\-\-version\fR
-Print version
-.TP
-[\fIARGUMENTS\fR]
-Overrides and recipe(s) to run, defaulting to the first recipe in the justfile
-.SH VERSION
-v1.27.0
-.SH AUTHORS
-Casey Rodarmor <casey@rodarmor.com>

src/analyzer.rs

@@ -37,6 +37,8 @@ impl<'src> Analyzer<'src> {
 
     let mut modules: Table<Justfile> = Table::new();
 
+    let mut unexports: HashSet<String> = HashSet::new();
+
     let mut definitions: HashMap<&str, (&'static str, Name)> = HashMap::new();
 
     let mut define = |name: Name<'src>,
@@ -98,6 +100,13 @@ impl<'src> Analyzer<'src> {
             self.analyze_set(set)?;
             self.sets.insert(set.clone());
           }
+          Item::Unexport { name } => {
+            if !unexports.insert(name.lexeme().to_string()) {
+              return Err(name.token.error(DuplicateUnexport {
+                variable: name.lexeme(),
+              }));
+            }
+          }
         }
       }
 
@@ -109,21 +118,23 @@ impl<'src> Analyzer<'src> {
     let mut recipe_table: Table<'src, UnresolvedRecipe<'src>> = Table::default();
 
     for assignment in assignments {
-      if !settings.allow_duplicate_variables
+      let variable = assignment.name.lexeme();
-        && self.assignments.contains_key(assignment.name.lexeme())
+
-      {
+      if !settings.allow_duplicate_variables && self.assignments.contains_key(variable) {
-        return Err(assignment.name.token.error(DuplicateVariable {
+        return Err(assignment.name.token.error(DuplicateVariable { variable }));
-          variable: assignment.name.lexeme(),
-        }));
       }
 
       if self
         .assignments
-        .get(assignment.name.lexeme())
+        .get(variable)
         .map_or(true, |original| assignment.depth <= original.depth)
       {
         self.assignments.insert(assignment.clone());
       }
+
+      if unexports.contains(variable) {
+        return Err(assignment.name.token.error(ExportUnexported { variable }));
+      }
     }
 
     AssignmentResolver::resolve_assignments(&self.assignments)?;
@@ -167,6 +178,7 @@ impl<'src> Analyzer<'src> {
       recipes,
       settings,
       source: root.into(),
+      unexports,
       warnings,
     })
   }

src/attribute.rs

@@ -42,7 +42,7 @@ impl AttributeDiscriminant {
 impl<'src> Attribute<'src> {
   pub(crate) fn new(
     name: Name<'src>,
-    argument: Option<StringLiteral<'src>>,
+    mut arguments: Vec<StringLiteral<'src>>,
   ) -> CompileResult<'src, Self> {
     use AttributeDiscriminant::*;
 
@@ -56,8 +56,7 @@ impl<'src> Attribute<'src> {
         })
       })?;
 
-    let found = argument.as_ref().iter().count();
+    let found = arguments.len();
-
     let range = discriminant.argument_range();
 
     if !range.contains(&found) {
@@ -72,9 +71,9 @@ impl<'src> Attribute<'src> {
     }
 
     Ok(match discriminant {
-      Confirm => Self::Confirm(argument),
+      Confirm => Self::Confirm(arguments.pop()),
-      Doc => Self::Doc(argument),
+      Doc => Self::Doc(arguments.pop()),
-      Group => Self::Group(argument.unwrap()),
+      Group => Self::Group(arguments.pop().unwrap()),
       Linux => Self::Linux,
       Macos => Self::Macos,
       NoCd => Self::NoCd,

src/command_ext.rs

@@ -1,25 +1,41 @@
 use super::*;
 
 pub(crate) trait CommandExt {
-  fn export(&mut self, settings: &Settings, dotenv: &BTreeMap<String, String>, scope: &Scope);
+  fn export(
+    &mut self,
+    settings: &Settings,
+    dotenv: &BTreeMap<String, String>,
+    scope: &Scope,
+    unexports: &HashSet<String>,
+  );
 
-  fn export_scope(&mut self, settings: &Settings, scope: &Scope);
+  fn export_scope(&mut self, settings: &Settings, scope: &Scope, unexports: &HashSet<String>);
 }
 
 impl CommandExt for Command {
-  fn export(&mut self, settings: &Settings, dotenv: &BTreeMap<String, String>, scope: &Scope) {
+  fn export(
+    &mut self,
+    settings: &Settings,
+    dotenv: &BTreeMap<String, String>,
+    scope: &Scope,
+    unexports: &HashSet<String>,
+  ) {
     for (name, value) in dotenv {
       self.env(name, value);
     }
 
     if let Some(parent) = scope.parent() {
-      self.export_scope(settings, parent);
+      self.export_scope(settings, parent, unexports);
     }
   }
 
-  fn export_scope(&mut self, settings: &Settings, scope: &Scope) {
+  fn export_scope(&mut self, settings: &Settings, scope: &Scope, unexports: &HashSet<String>) {
     if let Some(parent) = scope.parent() {
-      self.export_scope(settings, parent);
+      self.export_scope(settings, parent, unexports);
+    }
+
+    for unexport in unexports {
+      self.env_remove(unexport);
     }
 
     for binding in scope.bindings() {

src/compile_error.rs

@@ -131,6 +131,9 @@ impl Display for CompileError<'_> {
       DuplicateVariable { variable } => {
         write!(f, "Variable `{variable}` has multiple definitions")
       }
+      DuplicateUnexport { variable } => {
+        write!(f, "Variable `{variable}` is unexported multiple times")
+      }
       ExpectedKeyword { expected, found } => {
         let expected = List::or_ticked(expected);
         if found.kind == TokenKind::Identifier {
@@ -143,6 +146,9 @@ impl Display for CompileError<'_> {
           write!(f, "Expected keyword {expected} but found `{}`", found.kind)
         }
       }
+      ExportUnexported { variable } => {
+        write!(f, "Variable {variable} is both exported and unexported")
+      }
       ExtraLeadingWhitespace => write!(f, "Recipe line has extra leading whitespace"),
       FunctionArgumentCountMismatch {
         function,

src/compile_error_kind.rs

@@ -52,10 +52,16 @@ pub(crate) enum CompileErrorKind<'src> {
   DuplicateVariable {
     variable: &'src str,
   },
+  DuplicateUnexport {
+    variable: &'src str,
+  },
   ExpectedKeyword {
     expected: Vec<Keyword>,
     found: Token<'src>,
   },
+  ExportUnexported {
+    variable: &'src str,
+  },
   ExtraLeadingWhitespace,
   FunctionArgumentCountMismatch {
     function: &'src str,

src/error.rs

@@ -20,7 +20,7 @@ pub(crate) enum Error<'src> {
     token: Token<'src>,
     output_error: OutputError,
   },
-  CacheDirIo {
+  RuntimeDirIo {
     io_error: io::Error,
     path: PathBuf,
   },
@@ -287,9 +287,6 @@ impl<'src> ColorDisplay for Error<'src> {
           }?,
         OutputError::Utf8(utf8_error) => write!(f, "Backtick succeeded but stdout was not utf8: {utf8_error}")?,
       }
-      CacheDirIo { io_error, path } => {
-        write!(f, "I/O error in cache dir `{}`: {io_error}", path.display())?;
-      }
       ChooserInvoke { shell_binary, shell_arguments, chooser, io_error} => {
         let chooser = chooser.to_string_lossy();
         write!(f, "Chooser `{shell_binary} {shell_arguments} {chooser}` invocation failed: {io_error}")?;
@@ -407,6 +404,9 @@ impl<'src> ColorDisplay for Error<'src> {
         write!(f, "Recipe `{recipe}` was not confirmed")?;
       }
       RegexCompile { source } => write!(f, "{source}")?,
+      RuntimeDirIo { io_error, path } => {
+        write!(f, "I/O error in runtime dir `{}`: {io_error}", path.display())?;
+      }
       Search { search_error } => Display::fmt(search_error, f)?,
       Shebang { recipe, command, argument, io_error} => {
         if let Some(argument) = argument {

src/evaluator.rs

@@ -8,6 +8,7 @@ pub(crate) struct Evaluator<'src: 'run, 'run> {
   pub(crate) scope: Scope<'src, 'run>,
   pub(crate) search: &'run Search,
   pub(crate) settings: &'run Settings<'run>,
+  unsets: &'run HashSet<String>,
 }
 
 impl<'src, 'run> Evaluator<'src, 'run> {
@@ -19,6 +20,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
     scope: Scope<'src, 'run>,
     search: &'run Search,
     settings: &'run Settings<'run>,
+    unsets: &'run HashSet<String>,
   ) -> RunResult<'src, Scope<'src, 'run>> {
     let mut evaluator = Self {
       assignments: Some(assignments),
@@ -28,6 +30,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
       scope,
       search,
       settings,
+      unsets,
     };
 
     for assignment in assignments.values() {
@@ -217,7 +220,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
     cmd.arg(command);
     cmd.args(args);
     cmd.current_dir(&self.search.working_directory);
-    cmd.export(self.settings, self.dotenv, &self.scope);
+    cmd.export(self.settings, self.dotenv, &self.scope, self.unsets);
     cmd.stdin(Stdio::inherit());
     cmd.stderr(if self.config.verbosity.quiet() {
       Stdio::null()
@@ -261,6 +264,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
     scope: &'run Scope<'src, 'run>,
     search: &'run Search,
     settings: &'run Settings,
+    unsets: &'run HashSet<String>,
   ) -> RunResult<'src, (Scope<'src, 'run>, Vec<String>)> {
     let mut evaluator = Self {
       assignments: None,
@@ -270,6 +274,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
       scope: scope.child(),
       search,
       settings,
+      unsets,
     };
 
     let mut scope = scope.child();
@@ -316,6 +321,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
     scope: &'run Scope<'src, 'run>,
     search: &'run Search,
     settings: &'run Settings,
+    unsets: &'run HashSet<String>,
   ) -> Self {
     Self {
       assignments: None,
@@ -325,6 +331,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
       scope: Scope::child(scope),
       search,
       settings,
+      unsets,
     }
   }
 }

src/item.rs

@@ -20,6 +20,9 @@ pub(crate) enum Item<'src> {
   },
   Recipe(UnresolvedRecipe<'src>),
   Set(Set<'src>),
+  Unexport {
+    name: Name<'src>,
+  },
 }
 
 impl<'src> Display for Item<'src> {
@@ -61,6 +64,7 @@ impl<'src> Display for Item<'src> {
       }
       Self::Recipe(recipe) => write!(f, "{}", recipe.color_display(Color::never())),
       Self::Set(set) => write!(f, "{set}"),
+      Self::Unexport { name } => write!(f, "unexport {name}"),
     }
   }
 }

src/justfile.rs

@@ -24,6 +24,7 @@ pub(crate) struct Justfile<'src> {
   pub(crate) settings: Settings<'src>,
   #[serde(skip)]
   pub(crate) source: PathBuf,
+  pub(crate) unexports: HashSet<String>,
   pub(crate) warnings: Vec<Warning>,
 }
 
@@ -113,6 +114,7 @@ impl<'src> Justfile<'src> {
       scope,
       search,
       &self.settings,
+      &self.unexports,
     )
   }
 
@@ -163,7 +165,7 @@ impl<'src> Justfile<'src> {
 
         let scope = scope.child();
 
-        command.export(&self.settings, &dotenv, &scope);
+        command.export(&self.settings, &dotenv, &scope, &self.unexports);
 
         let status = InterruptHandler::guard(|| command.status()).map_err(|io_error| {
           Error::CommandInvoke {
@@ -286,6 +288,7 @@ impl<'src> Justfile<'src> {
         scope: invocation.scope,
         search,
         settings: invocation.settings,
+        unexports: &self.unexports,
       };
 
       Self::run_recipe(
@@ -441,6 +444,7 @@ impl<'src> Justfile<'src> {
       context.scope,
       search,
       context.settings,
+      context.unexports,
     )?;
 
     let scope = outer.child();
@@ -452,6 +456,7 @@ impl<'src> Justfile<'src> {
       &scope,
       search,
       context.settings,
+      context.unexports,
     );
 
     if !context.config.no_dependencies {

src/keyword.rs

@@ -25,6 +25,7 @@ pub(crate) enum Keyword {
   Shell,
   Tempdir,
   True,
+  Unexport,
   WindowsPowershell,
   WindowsShell,
   X,

src/lib.rs

@@ -42,7 +42,7 @@ pub(crate) use {
   std::{
     borrow::Cow,
     cmp,
-    collections::{BTreeMap, BTreeSet, HashMap},
+    collections::{BTreeMap, BTreeSet, HashMap, HashSet},
     env,
     ffi::OsString,
     fmt::{self, Debug, Display, Formatter},

src/node.rs

@@ -54,6 +54,11 @@ impl<'src> Node<'src> for Item<'src> {
       }
       Self::Recipe(recipe) => recipe.tree(),
       Self::Set(set) => set.tree(),
+      Self::Unexport { name } => {
+        let mut unexport = Tree::atom(Keyword::Unexport.lexeme());
+        unexport.push_mut(name.lexeme().replace('-', "_"));
+        unexport
+      }
     }
   }
 }

src/parser.rs

@@ -340,6 +340,11 @@ impl<'run, 'src> Parser<'run, 'src> {
             self.presume_keyword(Keyword::Export)?;
             items.push(Item::Assignment(self.parse_assignment(true)?));
           }
+          Some(Keyword::Unexport) => {
+            self.presume_keyword(Keyword::Unexport)?;
+            let name = self.parse_name()?;
+            items.push(Item::Unexport { name });
+          }
           Some(Keyword::Import)
             if self.next_are(&[Identifier, StringToken])
               || self.next_are(&[Identifier, Identifier, StringToken])
@@ -982,15 +987,29 @@ impl<'run, 'src> Parser<'run, 'src> {
       loop {
         let name = self.parse_name()?;
 
-        let argument = if self.accepted(ParenL)? {
+        let arguments: Vec<StringLiteral> = if self.next_is(Colon) {
-          let argument = self.parse_string_literal()?;
+          self.presume(Colon)?;
-          self.expect(ParenR)?;
+          let single_arg = self.parse_string_literal()?;
-          Some(argument)
+          vec![single_arg]
+        } else if self.next_is(ParenL) {
+          self.presume(ParenL)?;
+          let mut args = Vec::new();
+          loop {
+            args.push(self.parse_string_literal()?);
+            if self.next_is(ParenR) {
+              self.presume(ParenR)?;
+              break;
+            }
+            if self.next_is(Comma) {
+              self.presume(Comma)?;
+            }
+          }
+          args
         } else {
-          None
+          Vec::new()
         };
 
-        let attribute = Attribute::new(name, argument)?;
+        let attribute = Attribute::new(name, arguments)?;
 
         if let Some(line) = attributes.get(&attribute) {
           return Err(name.error(CompileErrorKind::DuplicateAttribute {
@@ -1153,6 +1172,18 @@ mod tests {
     tree: (justfile (alias t test)),
   }
 
+  test! {
+    name: single_argument_attribute_shorthand,
+    text: "[group: 'some-group']\nalias t := test",
+    tree: (justfile (alias t test)),
+  }
+
+  test! {
+    name: single_argument_attribute_shorthand_multiple_same_line,
+    text: "[group: 'some-group', group: 'some-other-group']\nalias t := test",
+    tree: (justfile (alias t test)),
+  }
+
   test! {
     name: aliases_multiple,
     text: "alias t := test\nalias b := build",

src/recipe.rs

@@ -169,6 +169,7 @@ impl<'src, D> Recipe<'src, D> {
       scope,
       context.search,
       context.settings,
+      context.unexports,
     );
 
     if self.shebang {
@@ -279,7 +280,7 @@ impl<'src, D> Recipe<'src, D> {
         cmd.stdout(Stdio::null());
       }
 
-      cmd.export(context.settings, context.dotenv, scope);
+      cmd.export(context.settings, context.dotenv, scope, context.unexports);
 
       match InterruptHandler::guard(|| cmd.status()) {
         Ok(exit_status) => {
@@ -353,9 +354,9 @@ impl<'src, D> Recipe<'src, D> {
     let tempdir = match &context.settings.tempdir {
       Some(tempdir) => tempdir_builder.tempdir_in(context.search.working_directory.join(tempdir)),
       None => {
-        if let Some(cache_dir) = dirs::cache_dir() {
+        if let Some(runtime_dir) = dirs::runtime_dir() {
-          let path = cache_dir.join("just");
+          let path = runtime_dir.join("just");
-          fs::create_dir_all(&path).map_err(|io_error| Error::CacheDirIo {
+          fs::create_dir_all(&path).map_err(|io_error| Error::RuntimeDirIo {
             io_error,
             path: path.clone(),
           })?;
@@ -425,7 +426,7 @@ impl<'src, D> Recipe<'src, D> {
       command.args(positional);
     }
 
-    command.export(context.settings, context.dotenv, scope);
+    command.export(context.settings, context.dotenv, scope, context.unexports);
 
     // run it!
     match InterruptHandler::guard(|| command.status()) {

src/recipe_context.rs

@@ -7,4 +7,5 @@ pub(crate) struct RecipeContext<'src: 'run, 'run> {
   pub(crate) scope: &'run Scope<'src, 'run>,
   pub(crate) search: &'run Search,
   pub(crate) settings: &'run Settings<'src>,
+  pub(crate) unexports: &'run HashSet<String>,
 }

tests/attributes.rs

@@ -72,7 +72,7 @@ fn multiple_attributes_one_line_error_message() {
     )
     .stderr(
       "
-        error: Expected ']', ',', or '(', but found identifier
+        error: Expected ']', ':', ',', or '(', but found identifier
          ——▶ justfile:1:17
           │
         1 │ [macos, windows linux]

tests/completions.rs

@@ -29,10 +29,10 @@ fn bash() {
 #[test]
 fn replacements() {
   for shell in ["bash", "elvish", "fish", "powershell", "zsh"] {
-    let status = Command::new(executable_path("just"))
+    let output = Command::new(executable_path("just"))
       .args(["--completions", shell])
-      .status()
+      .output()
       .unwrap();
-    assert!(status.success());
+    assert!(output.status.success());
   }
 }

tests/confirm.rs

@@ -130,7 +130,7 @@ fn confirm_recipe_with_prompt_too_many_args() {
             echo confirmed
         ",
     )
-    .stderr("error: Expected ')', but found ','\n ——▶ justfile:1:64\n  │\n1 │ [confirm(\"This is dangerous - are you sure you want to run it?\",\"this second argument is not supported\")]\n  │                                                                ^\n")
+    .stderr("error: Attribute `confirm` got 2 arguments but takes at most 1 argument\n ——▶ justfile:1:2\n  │\n1 │ [confirm(\"This is dangerous - are you sure you want to run it?\",\"this second argument is not supported\")]\n  │  ^^^^^^^\n")
     .stdout("")
     .status(1)
     .run();

tests/groups.rs

@@ -126,11 +126,10 @@ fn list_groups_with_custom_prefix() {
   Test::new()
     .justfile(
       "
-        [group('B')]
+        [group: 'B']
         foo:
 
-        [group('A')]
+        [group: 'A', group: 'B']
-        [group('B')]
         bar:
       ",
     )

tests/json.rs

@@ -59,6 +59,7 @@ fn alias() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -98,6 +99,7 @@ fn assignment() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -151,6 +153,7 @@ fn body() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -216,6 +219,7 @@ fn dependencies() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -319,6 +323,7 @@ fn dependency_argument() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -384,6 +389,7 @@ fn duplicate_recipes() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -427,6 +433,7 @@ fn duplicate_variables() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -473,6 +480,7 @@ fn doc_comment() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -505,6 +513,7 @@ fn empty_justfile() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -658,6 +667,7 @@ fn parameters() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -744,6 +754,7 @@ fn priors() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -790,6 +801,7 @@ fn private() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -836,6 +848,7 @@ fn quiet() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -897,6 +910,7 @@ fn settings() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -946,6 +960,7 @@ fn shebang() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -992,6 +1007,7 @@ fn simple() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -1041,6 +1057,7 @@ fn attribute() {
         "windows_powershell": false,
         "windows_shell": null,
       },
+      "unexports": [],
       "warnings": [],
     }),
   );
@@ -1103,6 +1120,7 @@ fn module() {
               "windows_powershell": false,
               "windows_shell": null,
             },
+            "unexports": [],
             "warnings": [],
           },
         },
@@ -1124,6 +1142,7 @@ fn module() {
           "windows_powershell": false,
           "windows_shell": null,
         },
+        "unexports": [],
         "warnings": [],
       }))
       .unwrap()

tests/lib.rs

@@ -104,6 +104,7 @@ mod summary;
 mod tempdir;
 mod timestamps;
 mod undefined_variables;
+mod unexport;
 mod unstable;
 #[cfg(target_family = "windows")]
 mod windows_shell;

tests/misc.rs

@@ -884,7 +884,7 @@ _private-recipe:
   args:     ("--list"),
   stdout:   r#"
     Available recipes:
-        a Z="\t z"          # something else
+        a Z="\t z"           # something else
         hello a b='B	' c='C' # this does a thing
   "#,
 }

tests/tempdir.rs

@@ -5,8 +5,8 @@ pub(crate) fn tempdir() -> TempDir {
 
   builder.prefix("just-test-tempdir");
 
-  if let Some(cache_dir) = dirs::cache_dir() {
+  if let Some(runtime_dir) = dirs::runtime_dir() {
-    let path = cache_dir.join("just");
+    let path = runtime_dir.join("just");
     fs::create_dir_all(&path).unwrap();
     builder.tempdir_in(path)
   } else {

tests/unexport.rs

@@ -0,0 +1,104 @@
+use super::*;
+
+#[test]
+fn unexport_environment_variable_linewise() {
+  Test::new()
+    .justfile(
+      "
+     unexport JUST_TEST_VARIABLE
+
+     @recipe:
+         echo ${JUST_TEST_VARIABLE:-unset}
+      ",
+    )
+    .env("JUST_TEST_VARIABLE", "foo")
+    .stdout("unset\n")
+    .run();
+}
+
+#[test]
+fn unexport_environment_variable_shebang() {
+  Test::new()
+    .justfile(
+      "
+     unexport JUST_TEST_VARIABLE
+
+     recipe:
+         #!/usr/bin/env bash
+         echo ${JUST_TEST_VARIABLE:-unset}
+      ",
+    )
+    .env("JUST_TEST_VARIABLE", "foo")
+    .stdout("unset\n")
+    .run();
+}
+
+#[test]
+fn duplicate_unexport_fails() {
+  Test::new()
+    .justfile(
+      "
+     unexport JUST_TEST_VARIABLE
+
+     recipe:
+         echo \"variable: $JUST_TEST_VARIABLE\"
+
+     unexport JUST_TEST_VARIABLE
+      ",
+    )
+    .env("JUST_TEST_VARIABLE", "foo")
+    .stderr(
+      "
+        error: Variable `JUST_TEST_VARIABLE` is unexported multiple times
+         ——▶ justfile:6:10
+          │
+        6 │ unexport JUST_TEST_VARIABLE
+          │          ^^^^^^^^^^^^^^^^^^
+      ",
+    )
+    .status(1)
+    .run();
+}
+
+#[test]
+fn export_unexport_conflict() {
+  Test::new()
+    .justfile(
+      "
+     unexport JUST_TEST_VARIABLE
+
+     recipe:
+         echo variable: $JUST_TEST_VARIABLE
+
+     export JUST_TEST_VARIABLE := 'foo'
+      ",
+    )
+    .stderr(
+      "
+        error: Variable JUST_TEST_VARIABLE is both exported and unexported
+         ——▶ justfile:6:8
+          │
+        6 │ export JUST_TEST_VARIABLE := 'foo'
+          │        ^^^^^^^^^^^^^^^^^^
+      ",
+    )
+    .status(1)
+    .run();
+}
+
+#[test]
+fn unexport_doesnt_override_local_recipe_export() {
+  Test::new()
+    .justfile(
+      "
+     unexport JUST_TEST_VARIABLE
+
+     recipe $JUST_TEST_VARIABLE:
+         @echo \"variable: $JUST_TEST_VARIABLE\"
+      ",
+    )
+    .args(["recipe", "value"])
+    .stdout("variable: value\n")
+    .status(0)
+    .run();
+}