Feature: Expose Aleph CLI Version #168 (#169)

src/aleph_client/__main__.py

@@ -4,15 +4,22 @@
 
 import typer
 
-from .commands import account, aggregate, files, message, program
+from .commands import about, account, aggregate, files, message, program
 
 app = typer.Typer()
 
+@app.callback()
+def common(
+    ctx: typer.Context,
+    version: bool = typer.Option(None, "--version", callback=about.get_version, help="Show Aleph CLI Version"),
+    v: bool = typer.Option(None, "-v", callback=about.get_version, help="Show Aleph CLI Version"),
+):
+    pass
+
 app.add_typer(account.app, name="account", help="Manage account")
 app.add_typer(
     aggregate.app, name="aggregate", help="Manage aggregate messages on aleph.im"
 )
-
 app.add_typer(
     files.app, name="file", help="File uploading and pinning on IPFS and aleph.im"
 )
@@ -24,6 +31,9 @@
 app.add_typer(
     program.app, name="program", help="Upload and update programs on aleph.im VM"
 )
+app.add_typer(
+    about.app, name="about", help="Display the informations of Aleph CLI"
+)
 
 
 if __name__ == "__main__":

src/aleph_client/commands/about.py

@@ -0,0 +1,20 @@
+import typer
+from pkg_resources import get_distribution
+
+app = typer.Typer()
+
+
+def get_version(value: bool):
+    __version__ = "NaN"
+    dist_name = "aleph-client"
+    if value:
+        try:
+            __version__ = get_distribution(dist_name).version
+        finally:
+            typer.echo(f"Aleph CLI Version: {__version__}")
+            raise typer.Exit(1)
+
+
+@app.command()
+def version():
+    get_version(True)