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MegaShell

This is a fully functional terminal written in Python.

Content:

Terminal1: Terminal

See more screenshots

Terminal2: Echo Hello World Terminal2: Echo version Terminal2: Example test command

Installation

There are two ways of installation. Either from Python or as an EXE installer.

Python

This probably works for all operating systems, but I only tested this on Windows and (Kali) Linux. At the moment the installation process is simple. Just follow these steps:

  • Download this repository
  • Put all files in a new dictionary on your system
  • Start 'main.py'
    • Windows: Double-click on the file icon
    • Other: Run python3 main.py in the file folder

EXE Installer (Windows only!)

Download the latest installer from this repository. Start it and follow all steps.

Installer1: Terms of Service

Usage

In general, MegaShell is a program in which any command can be added. The easiest way to do that is by simply creating a new file in the subfolder named 'commands'. The name can be anything you want. After creating a file just import the default libraries.

You get the most important one by just importing:

from files import internal as i

We recommend you also import the following to create a new command as quickly as possible.

# Get all information about the current MegaShell instance
from files.internal import info as inf

# Print library, highly recommended!
from files.internal import tools as t

# Print `errors`, `info`, etc
from files.internal import outputLibrary as ol

# The following is needed to create commands
from files.internal import commands as c

# This is needed to create constants like `%VERSION%` 
from files.internal import constants as const

# Needed when using parsing `v2`, highly recommended!
from files.commandtools import commandtools as ct

Important: In the following documentation, we use short names like inf or c! If you use your one imports, make sure to use your names too!

Creating commands

In this section, we talk about, how to create a command from "scratch".

Parsing V1

After that just type this in your created file:

@c.command
def c_name(*extra):
    """v1"""
    t.fprint("Well done!")

Here is the explanation:

  • By this, you created a command named name that prints "Well done!".
  • The version, in this case, v1, specifies how to parse the given arguments. It can be v1 or v2
  • In v1 only one attribute is allowed named *extra with just one star (!)

Parsing V2

Now we talk about parsing v2, it's a bit more complex but can be used much more easily to get specific arguments.

@c.command
def c_test(a="", b="", **extra):
    """v2"""
    a, b = ct.parse(extra, a, b)
    t.fprint("a: " + a)
    t.fprint("b: " + b)

If you read all of this, you see, this command is named test. The parsing version is set to v2. The set variables are the ones you want to use. In this example you have to run the command like this:

test --a aValue --b "Value for B"

Output:

a: aValue
b: Value for B

You see strings with ' and " are parsed too. The **extra argument is always needed to prevent errors. Unlike the one in v1, this is typed with two stars! The function commandtools.parse() is called to translate the extra dictionary to the arguments. That means you can also run the following command and still get the same output as given above.

test "aValue" --b "Value for B"
# OR
test --a aValue "Value for B"
# OR
test aValue "Value for B"

Output from all three:

a: aValue
b: Value for B

Important: When running a command, a definition only ends, if a value is given or if another definition starts (then the value is True). That means, if a function wants the two arguments a and a, it doesn't care about any value, that is completed, but if it takes away something an error is fired. UsageV2Img1: Error Example

Creating constants

Generally speaking, it's very easy to generate and use a constant. To create one just call the function const.constants().

const.constant("VERSION", inf.VERSION)

With this, you created the constant VERSION that returns the MegaShell version. You can use this by adding the name between two % in your command.

echo %VERSION%
# OR
echo %version%

The names can be executed in full upper or lowercase, so you can initial VERSION like this too, and get the same result.

const.constant("VerSioN", inf.VERSION)

Contributing

This is a small project by me (@JHubi1) and I don't have any help yet.

License

(See in LICENSE)

Copyright 2023 Xenia Software

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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MegaShell is a fully functional terminal written in Python.

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