installation updates

Author: TharukaCkasthuri

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "[python]": {
+        "editor.defaultFormatter": "ms-python.black-formatter"
+    },
+    "python.formatting.provider": "none"
+}

README.md

@@ -1,7 +1,16 @@
-# Installation Instruction for Jaclang Jupyter Kernel
+# A Jupyter kernel for Jaclang
+
+## Installation
+
+Installation Instruction for Jaclang Jupyter Kernel
+
+- Step 1: 
+
+```
+pip install jackernel
+python3 -m jackernel.install
+```
 
-- Step 1: Open the Terminal and go to `jaclang/support/`
-- Step 2: Run the command `jupyter kernelspec install --replace --user jupyter_kernel`
 - Step 3: Start the Jupyter Notebook; If you already installed you have to refresh the server.
 - Step 4: Open a new notebook and select the kernel as the `Jac`,
 

jackernel/install.py

@@ -0,0 +1,75 @@
+import json
+import os
+import sys
+import argparse
+import pathlib
+import shutil
+
+from jupyter_client.kernelspec import KernelSpecManager
+from IPython.utils.tempdir import TemporaryDirectory
+from .resources import _ICON_PATH
+
+kernel_json = {
+    "argv": ["python", "-m", "jackernel.kernel", "-f", "{connection_file}"],
+    "display_name": "Jac",
+    "language_info": {
+        "name": "python",
+        "mimetype": "text/plain",
+        "pygments_lexer": "jac_lexer",
+        "file_extension": ".jac",
+    },
+}
+
+
+def install_my_kernel_spec(user=True, prefix=None):
+    with TemporaryDirectory() as td:
+        os.chmod(td, 0o755)  # Starts off as 700, not user readable
+        with open(os.path.join(td, "kernel.json"), "w") as f:
+            json.dump(kernel_json, f, sort_keys=True)
+        # shutil.copyfile(_ICON_PATH, pathlib.Path(td) / _ICON_PATH.name)
+        KernelSpecManager().install_kernel_spec(td, "Jac", user=user, prefix=prefix)
+
+
+def _is_root():
+    try:
+        return os.geteuid() == 0
+    except AttributeError:
+        return False  # assume not an admin on non-Unix platforms
+
+
+def main(argv=None):
+    parser = argparse.ArgumentParser(description="Install KernelSpec for Jac Kernel")
+    prefix_locations = parser.add_mutually_exclusive_group()
+
+    prefix_locations.add_argument(
+        "--user",
+        help="Install KernelSpec in user's home directory",
+        action="store_true",
+    )
+    prefix_locations.add_argument(
+        "--sys-prefix",
+        help="Install KernelSpec in sys.prefix. Useful in conda / virtualenv",
+        action="store_true",
+        dest="sys_prefix",
+    )
+    prefix_locations.add_argument(
+        "--prefix", help="Install KernelSpec in this prefix", default=None
+    )
+
+    args = parser.parse_args(argv)
+
+    user = False
+    prefix = None
+    if args.sys_prefix:
+        prefix = sys.prefix
+    elif args.prefix:
+        prefix = args.prefix
+    elif args.user or not _is_root():
+        user = True
+
+    install_my_kernel_spec(user=user, prefix=prefix)
+
+
+if __name__ == "__main__":
+    main()
+    print("Installed jaclang kernel spec")