91 lines
2.8 KiB
Python
91 lines
2.8 KiB
Python
"""Rule for running package.json scripts with Bun."""
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def _shell_quote(value):
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return "'" + value.replace("'", "'\"'\"'") + "'"
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def _bun_script_impl(ctx):
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toolchain = ctx.toolchains["//bun:toolchain_type"]
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bun_bin = toolchain.bun.bun_bin
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package_json = ctx.file.package_json
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launcher = ctx.actions.declare_file(ctx.label.name)
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ctx.actions.write(
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output = launcher,
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is_executable = True,
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content = """#!/usr/bin/env bash
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set -euo pipefail
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runfiles_dir="${{RUNFILES_DIR:-$0.runfiles}}"
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workspace_root="${{runfiles_dir}}/_main"
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bun_bin="${{runfiles_dir}}/_main/{bun_short_path}"
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package_json="${{runfiles_dir}}/_main/{package_json_short_path}"
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package_dir="$(dirname "${{package_json}}")"
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working_dir="{working_dir}"
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if [[ "${{working_dir}}" == "package" ]]; then
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cd "${{package_dir}}"
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else
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cd "${{workspace_root}}"
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fi
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exec "${{bun_bin}}" --bun run {script} "$@"
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""".format(
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bun_short_path = bun_bin.short_path,
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package_json_short_path = package_json.short_path,
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working_dir = ctx.attr.working_dir,
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script = _shell_quote(ctx.attr.script),
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),
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)
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transitive_files = []
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if ctx.attr.node_modules:
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transitive_files.append(ctx.attr.node_modules[DefaultInfo].files)
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runfiles = ctx.runfiles(
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files = [bun_bin, package_json] + ctx.files.data,
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transitive_files = depset(transitive = transitive_files),
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)
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return [
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DefaultInfo(
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executable = launcher,
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runfiles = runfiles,
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),
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]
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bun_script = rule(
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implementation = _bun_script_impl,
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doc = """Runs a named `package.json` script with Bun as an executable target.
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Use this rule to expose existing package scripts such as `dev`, `build`, or
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`check` via `bazel run` without adding wrapper shell scripts.
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""",
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attrs = {
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"script": attr.string(
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mandatory = True,
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doc = "Name of the `package.json` script to execute via `bun run <script>`.",
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),
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"package_json": attr.label(
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mandatory = True,
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allow_single_file = True,
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doc = "Label of the `package.json` file containing the named script.",
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),
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"node_modules": attr.label(
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doc = "Optional label providing Bun/npm package files in runfiles.",
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),
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"data": attr.label_list(
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allow_files = True,
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doc = "Additional runtime files required by the script.",
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),
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"working_dir": attr.string(
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default = "package",
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values = ["workspace", "package"],
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doc = "Working directory at runtime: Bazel runfiles `workspace` root or the directory containing `package.json`.",
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),
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},
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executable = True,
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toolchains = ["//bun:toolchain_type"],
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) |