feat(workspaces): --include-workspace-root

Adds a new config item that includes the workspace root when running
non-arborist commands (i.e. repo, version, publish).  Arborist will need
to be udpated to look for this flag to change its behavior to include
the workspace root for its functions.

This also changes --workspaces to a trinary, so that setting it to false
will explicitly exclude workspaces altogether.  This is also going to
require an arborist change so that it ignores workspaces altogether.

Co-author: @fritzy

PR-URL: #3816
Credit: @isaacs
Close: #3816
Reviewed-by: @wraithgar

docs/content/commands/npm-audit.md

@@ -313,8 +313,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a
@@ -327,17 +327,39 @@ This value is not exported to the environment for child processes.
 
 #### `workspaces`
 
-* Default: false
-* Type: Boolean
+* Default: null
+* Type: null or Boolean
 
-Enable running a command in the context of **all** the configured
+Set to true to run the command in the context of **all** configured
 workspaces.
 
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
 This value is not exported to the environment for child processes.
 
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 <!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
 
 ### See Also

docs/content/commands/npm-dedupe.md

@@ -247,8 +247,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a
@@ -261,17 +261,39 @@ This value is not exported to the environment for child processes.
 
 #### `workspaces`
 
-* Default: false
-* Type: Boolean
+* Default: null
+* Type: null or Boolean
 
-Enable running a command in the context of **all** the configured
+Set to true to run the command in the context of **all** configured
 workspaces.
 
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
 This value is not exported to the environment for child processes.
 
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 <!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
 
 ### See Also

docs/content/commands/npm-diff.md

@@ -286,8 +286,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a
@@ -300,17 +300,39 @@ This value is not exported to the environment for child processes.
 
 #### `workspaces`
 
-* Default: false
-* Type: Boolean
+* Default: null
+* Type: null or Boolean
 
-Enable running a command in the context of **all** the configured
+Set to true to run the command in the context of **all** configured
 workspaces.
 
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
 This value is not exported to the environment for child processes.
 
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 <!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
 ## See Also
 

docs/content/commands/npm-dist-tag.md

@@ -106,8 +106,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a
@@ -120,17 +120,39 @@ This value is not exported to the environment for child processes.
 
 #### `workspaces`
 
-* Default: false
-* Type: Boolean
+* Default: null
+* Type: null or Boolean
 
-Enable running a command in the context of **all** the configured
+Set to true to run the command in the context of **all** configured
 workspaces.
 
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
 This value is not exported to the environment for child processes.
 
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 <!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
 
 ### See Also

docs/content/commands/npm-docs.md

@@ -63,8 +63,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a
@@ -77,17 +77,39 @@ This value is not exported to the environment for child processes.
 
 #### `workspaces`
 
-* Default: false
-* Type: Boolean
+* Default: null
+* Type: null or Boolean
 
-Enable running a command in the context of **all** the configured
+Set to true to run the command in the context of **all** configured
 workspaces.
 
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
 This value is not exported to the environment for child processes.
 
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 <!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
 
 ### See Also

docs/content/commands/npm-exec.md

@@ -164,8 +164,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a
@@ -178,17 +178,39 @@ This value is not exported to the environment for child processes.
 
 #### `workspaces`
 
-* Default: false
-* Type: Boolean
+* Default: null
+* Type: null or Boolean
 
-Enable running a command in the context of **all** the configured
+Set to true to run the command in the context of **all** configured
 workspaces.
 
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
 This value is not exported to the environment for child processes.
 
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 <!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
 
 ### Examples

docs/content/commands/npm-explain.md

@@ -85,8 +85,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a

docs/content/commands/npm-find-dupes.md

@@ -174,8 +174,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a
@@ -188,17 +188,39 @@ This value is not exported to the environment for child processes.
 
 #### `workspaces`
 
-* Default: false
-* Type: Boolean
+* Default: null
+* Type: null or Boolean
 
-Enable running a command in the context of **all** the configured
+Set to true to run the command in the context of **all** configured
 workspaces.
 
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
 This value is not exported to the environment for child processes.
 
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 <!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
 
 ### See Also

docs/content/commands/npm-fund.md

@@ -122,8 +122,8 @@ Valid values for the `workspace` config are either:
 
 * Workspace names
 * Path to a workspace directory
-* Path to a parent workspace directory (will result to selecting all of the
-  nested workspaces)
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
 
 When set for the `npm init` command, this may be set to the folder of a
 workspace which does not yet exist, to create the folder and set it up as a