Version: 1.34.x

npm_package

Rules for linking npm dependencies and packaging and linking first-party deps.

Load these with,

load("@aspect_rules_js//npm:defs.bzl", "npm_package")

Macros and Functions

npm_package

A macro that packages sources into a directory (a tree artifact) and provides an NpmPackageInfo.

This target can be used as the src attribute to npm_link_package.

The macro also produces a target [name].publish, that can be run to publish to an npm registry. Under the hood, this target runs npm publish. You can pass arguments to npm by escaping them from Bazel using a double-hyphen, for example: bazel run //path/to:my_package.publish -- --tag=next

Files and directories can be arranged as needed in the output directory using the root_paths, include_srcs_patterns, exclude_srcs_patterns and replace_prefixes attributes.

Filters and transformations are applied in the following order:

include_external_repositories
include_srcs_packages
exclude_srcs_packages
root_paths
include_srcs_patterns
exclude_srcs_patterns
replace_prefixes

For more information each filters / transformations applied, see the documentation for the specific filter / transformation attribute.

Glob patterns are supported. Standard wildcards (globbing patterns) plus the ** doublestar (aka. super-asterisk) are supported with the underlying globbing library, https://github.com/bmatcuk/doublestar. This is the same globbing library used by gazelle. See https://github.com/bmatcuk/doublestar#patterns for more information on supported globbing patterns.

npm_package makes use of copy_to_directory (https://docs.aspect.build/rules/aspect_bazel_lib/docs/copy_to_directory) under the hood, adopting its API and its copy action using composition. However, unlike copy_to_directory, npm_package includes transitive_sources and transitive_declarations files from JsInfo providers in srcs by default. The behavior of including sources and declarations from JsInfo can be configured using the include_sources, include_transitive_sources, include_declarations, include_transitive_declarations attributes.

The two include*_declarations options may cause type-check actions to run, which slows down your development round-trip. You can pass the Bazel option --@aspect_rules_js//npm:exclude_declarations_from_npm_packages to override these two attributes for an individual bazel invocation, avoiding the type-check.

npm_package also includes default runfiles from srcs by default which copy_to_directory does not. This behavior can be configured with the include_runfiles attribute.

The default include_srcs_packages, [".", "./**"], prevents files from outside of the target's package and subpackages from being included.

The default exclude_srcs_patterns, of ["node_modules/**", "**/node_modules/**"], prevents node_modules files from being included.

To stamp the current git tag as the "version" in the package.json file, see stamped_package_json

Example usage (generated):

load("@aspect_rules_js//npm:defs.bzl", "npm_package")

npm_package(
    # Unique name for this target.
    name = "",
)

name

Required.

Unique name for this target.

srcs

Optional. Default: []

Files and/or directories or targets that provide DirectoryPathInfo to copy into the output directory.

data

Optional. Default: []

Runtime / linktime npm dependencies of this npm package.

NpmPackageStoreInfo providers are gathered from JsInfo of the targets specified. Targets can be linked npm packages, npm package store targets or other targets that provide JsInfo. This is done directly from the npm_package_store_deps field of these. For linked npm package targets, the underlying npm_package_store target(s) that back the links is used.

Gathered NpmPackageStoreInfo providers are used downstream as direct dependencies of this npm package when linking with npm_link_package.

args

Optional. Default: []

Arguments that are passed down to <name>.publish target and npm publish command.

out

Optional. Default: None

Path of the output directory, relative to this package.

package

Optional. Default: ""

The package name. If set, should match the name field in the package.json file for this package.

If set, the package name set here will be used for linking if a npm_link_package does not specify a package name. A npm_link_package that specifies a package name will override the value here when linking.

If unset, a npm_link_package that references this npm_package must define the package name must be for linking.

version

Optional. Default: "0.0.0"

The package version. If set, should match the version field in the package.json file for this package.

If set, a npm_link_package may omit the package version and the package version set here will be used for linking. A npm_link_package that specifies a package version will override the value here when linking.

If unset, a npm_link_package that references this npm_package must define the package version must be for linking.

root_paths

Optional. Default: ["."]

List of paths (with glob support) that are roots in the output directory.

If any parent directory of a file being copied matches one of the root paths patterns specified, the output directory path will be the path relative to the root path instead of the path relative to the file's workspace. If there are multiple root paths that match, the longest match wins.

Matching is done on the parent directory of the output file path so a trailing '**' glob patterm will match only up to the last path segment of the dirname and will not include the basename. Only complete path segments are matched. Partial matches on the last segment of the root path are ignored.

Forward slashes (/) should be used as path separators.

A "." value expands to the target's package path (ctx.label.package).

Defaults to ["."] which results in the output directory path of files in the target's package and and sub-packages are relative to the target's package and files outside of that retain their full workspace relative paths.

Globs are supported (see rule docstring above).

include_external_repositories

Optional. Default: []

List of external repository names (with glob support) to include in the output directory.

Files from external repositories are only copied into the output directory if the external repository they come from matches one of the external repository patterns specified.

When copied from an external repository, the file path in the output directory defaults to the file's path within the external repository. The external repository name is not included in that path.

For example, the following copies @external_repo//path/to:file to path/to/file within the output directory.

npp_package(
    name = "dir",
    include_external_repositories = ["external_*"],
    srcs = ["@external_repo//path/to:file"],
)

Files that come from matching external are subject to subsequent filters and transformations to determine if they are copied and what their path in the output directory will be. The external repository name of the file from an external repository is not included in the output directory path and is considered in subsequent filters and transformations.

Globs are supported (see rule docstring above).

include_srcs_packages

Optional. Default: ["./**"]

List of Bazel packages (with glob support) to include in output directory.

Files in srcs are only copied to the output directory if the Bazel package of the file matches one of the patterns specified.

Forward slashes (/) should be used as path separators. A first character of "." will be replaced by the target's package path.

Defaults to ["./**"] which includes sources target's package and subpackages.

Files that have matching Bazel packages are subject to subsequent filters and transformations to determine if they are copied and what their path in the output directory will be.

Globs are supported (see rule docstring above).

exclude_srcs_packages

Optional. Default: []

List of Bazel packages (with glob support) to exclude from output directory.

Files in srcs are not copied to the output directory if the Bazel package of the file matches one of the patterns specified.

Forward slashes (/) should be used as path separators. A first character of "." will be replaced by the target's package path.

Defaults to ["/node_modules/"] which excludes all node_modules folders from the output directory.

Files that have do not have matching Bazel packages are subject to subsequent filters and transformations to determine if they are copied and what their path in the output directory will be.

Globs are supported (see rule docstring above).

include_srcs_patterns

Optional. Default: ["**"]

List of paths (with glob support) to include in output directory.

Files in srcs are only copied to the output directory if their output directory path, after applying root_paths, matches one of the patterns specified.

Forward slashes (/) should be used as path separators.

Defaults to ["**"] which includes all sources.

Files that have matching output directory paths are subject to subsequent filters and transformations to determine if they are copied and what their path in the output directory will be.

Globs are supported (see rule docstring above).

exclude_srcs_patterns

Optional. Default: ["**/node_modules/**"]

List of paths (with glob support) to exclude from output directory.

Files in srcs are not copied to the output directory if their output directory path, after applying root_paths, matches one of the patterns specified.

Forward slashes (/) should be used as path separators.

Files that do not have matching output directory paths are subject to subsequent filters and transformations to determine if they are copied and what their path in the output directory will be.

Globs are supported (see rule docstring above).

replace_prefixes

Optional. Default: {}

Map of paths prefixes (with glob support) to replace in the output directory path when copying files.

If the output directory path for a file starts with or fully matches a a key in the dict then the matching portion of the output directory path is replaced with the dict value for that key. The final path segment matched can be a partial match of that segment and only the matching portion will be replaced. If there are multiple keys that match, the longest match wins.

Forward slashes (/) should be used as path separators.

Replace prefix transformation are the final step in the list of filters and transformations. The final output path of a file being copied into the output directory is determined at this step.

Globs are supported (see rule docstring above).

allow_overwrites

Optional. Default: False

If True, allow files to be overwritten if the same output file is copied to twice.

The order of srcs matters as the last copy of a particular file will win when overwriting. Performance of npm_package will be slightly degraded when allow_overwrites is True since copies cannot be parallelized out as they are calculated. Instead all copy paths must be calculated before any copies can be started.

include_sources

Optional. Default: True

When True, sources from JsInfo providers in data targets are included in the list of available files to copy.

include_transitive_sources

Optional. Default: True

When True, transitive_sources from JsInfo providers in data targets are included in the list of available files to copy.

include_declarations

Optional. Default: True

When True, declarations from JsInfo providers in data targets are included in the list of available files to copy.

include_transitive_declarations

Optional. Default: True

When True, transitive_declarations from JsInfo providers in data targets are included in the list of available files to copy.

include_runfiles

Optional. Default: True

When True, default runfiles from srcs targets are included in the list of available files to copy.

This may be needed in a few cases:

to work-around issues with rules that don't provide everything needed in sources, transitive_sources, declarations & transitive_declarations
to depend on the runfiles targets that don't use JsInfo

NB: The default value will be flipped to False in the next major release as runfiles are not needed in the general case and adding them to the list of files available to copy can add noticeable overhead to the analysis phase in a large repository with many npm_package targets.

hardlink

Optional. Default: "auto"

Controls when to use hardlinks to files instead of making copies.

Creating hardlinks is much faster than making copies of files with the caveat that hardlinks share file permissions with their source.

Since Bazel removes write permissions on files in the output tree after an action completes, hardlinks to source files are not recommended since write permissions will be inadvertently removed from sources files.

auto: hardlinks are used for generated files already in the output tree
off: all files are copied
on: hardlinks are used for all files (not recommended)

verbose

Optional. Default: False

If true, prints out verbose logs to stdout

kwargs

Optional.

Additional attributes such as tags and visibility

npm_package_lib.implementation

Example usage (generated):

load("@aspect_rules_js//npm:defs.bzl", "npm_package_lib")

npm_package_lib.implementation(
    ctx = None,
)

ctx

Required.

stamped_package_json

Convenience wrapper to set the "version" property in package.json with the git tag.

In unstamped builds (typically those without --stamp) the version will be set to 0.0.0. This ensures that actions which use the package.json file can get cache hits.

For more information on stamping, read https://docs.aspect.build/rules/aspect_bazel_lib/docs/stamping.

Using this rule requires that you register the jq toolchain in your WORKSPACE:

load("@aspect_bazel_lib//lib:repositories.bzl", "register_jq_toolchains")

register_jq_toolchains()

Example usage (generated):

load("@aspect_rules_js//npm:defs.bzl", "stamped_package_json")

stamped_package_json(
    # name of the resulting `jq` target, must be "package"
    name = "",
    # a key from the bazel-out/stable-status.txt or bazel-out/volatile-status.txt files
    stamp_var = None,
)

name

Required.

name of the resulting jq target, must be "package"

stamp_var

Required.

a key from the bazel-out/stable-status.txt or bazel-out/volatile-status.txt files

kwargs

Optional.

additional attributes passed to the jq rule, see https://docs.aspect.build/rules/aspect_bazel_lib/docs/jq

Macros and Functions

npm_package​

name​

srcs​

data​

args​

out​

package​

version​

root_paths​

include_external_repositories​

include_srcs_packages​

exclude_srcs_packages​

include_srcs_patterns​

exclude_srcs_patterns​

replace_prefixes​

allow_overwrites​

include_sources​

include_transitive_sources​

include_declarations​

include_transitive_declarations​

include_runfiles​

hardlink​

verbose​

kwargs​

npm_package_lib.implementation​

ctx​

stamped_package_json​

name​

stamp_var​

kwargs​

npm_package

name

srcs

data

args

out

package

version

root_paths

include_external_repositories

include_srcs_packages

exclude_srcs_packages

include_srcs_patterns

exclude_srcs_patterns

replace_prefixes

allow_overwrites

include_sources

include_transitive_sources

include_declarations

include_transitive_declarations

include_runfiles

hardlink

verbose

kwargs

npm_package_lib.implementation

ctx

stamped_package_json

name

stamp_var

kwargs