Show help when mandatory CLI parameters are missing

[Copilot]

The tool throws an unhandled ArgumentException when invoked without --input or --json-input, resulting in a stack trace instead of actionable guidance.

Changes

• Validation in Program.cs: Added check for mandatory parameters in SetAction handler. When both --input and --json-input are null, displays error message and invokes help before returning exit code 1.

• Variable reuse: Eliminated duplicate GetValue() calls by reusing extracted inputFile and inputJsonFile variables when constructing CommandLineOptions.

• Defensive exception: Updated comment in CommandLineOptionsParser.GetInputFiles() to clarify exception serves as defensive check if method is called directly or validation is bypassed.

Before:

Unhandled exception: System.ArgumentException: Please provide an input file using --input or --json-input
   at NuGetLicense.CommandLineOptionsParser.GetInputFiles(String inputFile, String inputJsonFile)
   ...

After:

Error: Please provide an input file using --input or --json-input

Description:
  A .net tool to print and validate the licenses of .net code...

Usage:
  nuget-license [options]

Options:
  -i, --input <i>        The project (or solution) file for which to analyze dependency licenses
  ...

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• accounts.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
  • Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-client-side-phishing-detection --disable-default-apps --disable-dev-shm-usage --disable-features=IgnoreDuplicateNavs,Prewarm --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --enable-automation --enable-logging=stderr --headless --log-level=0 --no-first-run --no-service-autorun --password-store=basic (dns block)
• android.clients.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
  • Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-client-side-phishing-detection --disable-default-apps --disable-dev-shm-usage --disable-features=IgnoreDuplicateNavs,Prewarm --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --enable-automation --enable-logging=stderr --headless --log-level=0 --no-first-run --no-service-autorun --password-store=basic (dns block)
• clients2.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
  • Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-client-side-phishing-detection --disable-default-apps --disable-dev-shm-usage --disable-features=IgnoreDuplicateNavs,Prewarm --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --enable-automation --enable-logging=stderr --headless --log-level=0 --no-first-run --no-service-autorun --password-store=basic (dns block)
• google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
• optimizationguide-pa.googleapis.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
  • Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-client-side-phishing-detection --disable-default-apps --disable-dev-shm-usage --disable-features=IgnoreDuplicateNavs,Prewarm --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --enable-automation --enable-logging=stderr --headless --log-level=0 --no-first-run --no-service-autorun --password-store=basic (dns block)
• update.googleapis.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
  • Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-client-side-phishing-detection --disable-default-apps --disable-dev-shm-usage --disable-features=IgnoreDuplicateNavs,Prewarm --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --enable-automation --enable-logging=stderr --headless --log-level=0 --no-first-run --no-service-autorun --password-store=basic (dns block)
• www.apache.org
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
  • Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-client-side-phishing-detection --disable-default-apps --disable-dev-shm-usage --disable-features=IgnoreDuplicateNavs,Prewarm --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --enable-automation --enable-logging=stderr --headless --log-level=0 --no-first-run --no-service-autorun --password-store=basic (dns block)
• www.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=7317 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/org.chromium.Chromium.scoped_dir.6pUN9x --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,4154792159544902164,12028619166343032544,262144 --disable-features=IgnoreDuplicateNavs,PaintHolding,Prewarm --variations-seed-version --trace-process-track-uuid=3190708989122997041 --enable-logging=stderr --log-level=0 iptables (dns block)
  • Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-client-side-phishing-detection --disable-default-apps --disable-dev-shm-usage --disable-features=IgnoreDuplicateNavs,Prewarm --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --enable-automation --enable-logging=stderr --headless --log-level=0 --no-first-run --no-service-autorun --password-store=basic (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Show help when mandatory command line parameter is missing</issue_title>
<issue_description>With this PR the command line parameter evaluation should first check if all mandatory inputs are provided. If something is missing then the help output should be shown</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Show help when mandatory command line parameter is missing #420

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

Summary by CodeRabbit

• Bug Fixes
  • Improved validation of required command-line arguments (--input or --json-input). The application now provides clearer error messages and exits with code 1 when mandatory arguments are missing, preventing unexpected behavior from incomplete input.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

• ✅ Full review completed - (🔄 Check again to review again)

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}