No more full summary if link count zero

linkstatus/linkstatus.py

@@ -68,7 +68,12 @@ def main(source, recursive, timeout, retry):
     down_count = 0
     skip_count = 0
 
-    files = all_files(source, recursive=recursive)
+    if source:
+        files = all_files(source, recursive=recursive)
+    else:
+        click.echo("Source Not Found")
+        click.echo("Run 'linkstatus --help' for more information.")
+        exit(1)
 
     for f in files:
         links = parse_file(f)
@@ -114,18 +119,22 @@ def main(source, recursive, timeout, retry):
                         )
 
     # Print summary
-    columns = get_terminal_size().columns
-    click.echo("=" * columns)
-    click.echo(click.style("Links Status Summary".center(columns), bold=True))
-    click.echo(click.style("Links UP: {}".format(up_count).center(columns), fg="green"))
-    click.echo(click.style("Links SKIP: {}".format(skip_count).center(columns), fg="blue"))
-    click.echo(click.style("Links DOWN: {}".format(down_count).center(columns), fg="red"))
-
-    if exit_code == 1:
-        click.echo(
-            "Warning: Use `noqa` inline comment to skip link check. "
-            "like, response code 403 due to header restrictions etc..."
-        )
-
-    click.echo("=" * columns)
+    total_links = up_count + skip_count + down_count
+
+    if total_links:
+        columns = get_terminal_size().columns
+        click.echo("=" * columns)
+        click.echo(click.style("Links Status Summary".center(columns), bold=True))
+        click.echo(click.style("Links UP: {}".format(up_count).center(columns), fg="green"))
+        click.echo(click.style("Links SKIP: {}".format(skip_count).center(columns), fg="blue"))
+        click.echo(click.style("Links DOWN: {}".format(down_count).center(columns), fg="red"))
+
+        if exit_code == 1:
+            click.echo(
+                "Warning: Use `noqa` inline comment to skip link check. "
+                "like, response code 403 due to header restrictions etc..."
+            )
+        click.echo("=" * columns)
+    else:
+        click.echo("No link found")
     exit(exit_code)

tests/test_linkstatus.py

@@ -1,6 +1,18 @@
 import os
+import subprocess
+
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 
 
 def test_linkstatus_command():
-    return_code = os.system("linkstatus")
-    assert return_code == 0
+    result = subprocess.run("linkstatus", stdout=subprocess.PIPE)
+    assert result.returncode == 1
+    assert "Source Not Found" in result.stdout.decode()
+    assert "Run 'linkstatus --help' for more information." in result.stdout.decode()
+
+
+def test_linkstatus_command_with_source():
+    src = os.path.join(BASE_DIR, "conftest.py")
+    result = subprocess.run(["linkstatus", src], stdout=subprocess.PIPE)
+    assert result.returncode == 0
+    assert result.stdout.decode().strip() == "No link found"