mirror of
https://github.com/nushell/nushell.git
synced 2024-11-29 11:54:02 +01:00
789b2e603a
# Description As title.. # User-Facing Changes None # Tests + Formatting Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # After Submitting If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date.
437 lines
17 KiB
Python
Executable File
437 lines
17 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# Example of using a Python script as a Nushell plugin
|
|
#
|
|
# The example uses JSON encoding but it should be a similar process using
|
|
# msgpack to move data between Nushell and the plugin. The only difference
|
|
# would be that you need to use msgpack relative lib(like msgpack) to
|
|
# decode and encode information that is read and written to stdin and stdout
|
|
#
|
|
# To register the plugin use:
|
|
# register <path-to-py-file>
|
|
#
|
|
# Be careful with the spans. Miette will crash if a span is outside the
|
|
# size of the contents vector. For this example we are using 0 and 1, which will
|
|
# point to the beginning of the contents vector. We strongly suggest using the span
|
|
# found in the plugin call head
|
|
#
|
|
# The plugin will be run using the active Python implementation. If you are in
|
|
# a Python environment, that is the Python version that is used
|
|
#
|
|
# Note: To keep the plugin simple and without dependencies, the dictionaries that
|
|
# represent the data transferred between Nushell and the plugin are kept as
|
|
# native Python dictionaries. The encoding and decoding process could be improved
|
|
# by using libraries like pydantic and marshmallow
|
|
#
|
|
# This plugin uses python3
|
|
# Note: To debug plugins write to stderr using sys.stderr.write
|
|
import sys
|
|
import json
|
|
|
|
|
|
def signatures():
|
|
"""
|
|
Multiple signatures can be sent to Nushell. Each signature will be registered
|
|
as a different plugin function in Nushell.
|
|
|
|
In your plugin logic you can use the name of the signature to indicate what
|
|
operation should be done with the plugin
|
|
"""
|
|
return {
|
|
"Signature": [
|
|
{
|
|
"sig": {
|
|
"name": "nu-python",
|
|
"usage": "Signature test for Python",
|
|
"extra_usage": "",
|
|
"input_type": "Any",
|
|
"output_type": "Any",
|
|
"required_positional": [
|
|
{
|
|
"name": "a",
|
|
"desc": "required integer value",
|
|
"shape": "Int",
|
|
"var_id": None,
|
|
},
|
|
{
|
|
"name": "b",
|
|
"desc": "required string value",
|
|
"shape": "String",
|
|
"var_id": None,
|
|
},
|
|
],
|
|
"optional_positional": [
|
|
{
|
|
"name": "opt",
|
|
"desc": "Optional number",
|
|
"shape": "Int",
|
|
"var_id": None,
|
|
}
|
|
],
|
|
"rest_positional": {
|
|
"name": "rest",
|
|
"desc": "rest value string",
|
|
"shape": "String",
|
|
"var_id": None,
|
|
},
|
|
"vectorizes_over_list": False,
|
|
"named": [
|
|
{
|
|
"long": "help",
|
|
"short": "h",
|
|
"arg": None,
|
|
"required": False,
|
|
"desc": "Display the help message for this command",
|
|
"var_id": None,
|
|
},
|
|
{
|
|
"long": "flag",
|
|
"short": "f",
|
|
"arg": None,
|
|
"required": False,
|
|
"desc": "a flag for the signature",
|
|
"var_id": None,
|
|
},
|
|
{
|
|
"long": "named",
|
|
"short": "n",
|
|
"arg": "String",
|
|
"required": False,
|
|
"desc": "named string",
|
|
"var_id": None,
|
|
},
|
|
],
|
|
"input_output_types": [["Any", "Any"]],
|
|
"allow_variants_without_examples": True,
|
|
"search_terms": ["Python", "Example"],
|
|
"is_filter": False,
|
|
"creates_scope": False,
|
|
"allows_unknown_args": False,
|
|
"category": "Experimental",
|
|
},
|
|
"examples": [],
|
|
}
|
|
]
|
|
}
|
|
|
|
|
|
def process_call(plugin_call):
|
|
"""
|
|
plugin_call is a dictionary with the information from the call
|
|
It should contain:
|
|
- The name of the call
|
|
- The call data which includes the positional and named values
|
|
- The input from the pipeline
|
|
|
|
Use this information to implement your plugin logic
|
|
"""
|
|
# Pretty printing the call to stderr
|
|
sys.stderr.write(json.dumps(plugin_call, indent=4))
|
|
sys.stderr.write("\n")
|
|
|
|
# Creates a Value of type List that will be encoded and sent to Nushell
|
|
return {
|
|
"Value": {
|
|
"List": {
|
|
"vals": [
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 1,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 2,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 2,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 4,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 3,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 6,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 4,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 8,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 5,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 10,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 6,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 12,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 7,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 14,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 8,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 16,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Record": {
|
|
"cols": ["one", "two", "three"],
|
|
"vals": [
|
|
{
|
|
"Int": {
|
|
"val": 0,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 9,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
{
|
|
"Int": {
|
|
"val": 18,
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
},
|
|
],
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
def tell_nushell_encoding():
|
|
sys.stdout.write(chr(4))
|
|
for ch in "json":
|
|
sys.stdout.write(chr(ord(ch)))
|
|
sys.stdout.flush()
|
|
|
|
|
|
def plugin():
|
|
tell_nushell_encoding()
|
|
call_str = ",".join(sys.stdin.readlines())
|
|
plugin_call = json.loads(call_str)
|
|
|
|
if plugin_call == "Signature":
|
|
signature = json.dumps(signatures())
|
|
sys.stdout.write(signature)
|
|
|
|
elif "CallInfo" in plugin_call:
|
|
response = process_call(plugin_call)
|
|
sys.stdout.write(json.dumps(response))
|
|
|
|
else:
|
|
# Use this error format if you want to return an error back to Nushell
|
|
error = {
|
|
"Error": {
|
|
"label": "ERROR from plugin",
|
|
"msg": "error message pointing to call head span",
|
|
"span": {"start": 0, "end": 1},
|
|
}
|
|
}
|
|
sys.stdout.write(json.dumps(error))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
plugin()
|