### Example Usage of vm-host-problem-watch.sh

Source: https://github.com/vnoi-admin/judge-server/blob/master/contrib/vm-host-problem-watch/README.md

Demonstrates how to use the script to watch a problem directory and notify a list of judges about updates. It shows the setup, a sample problem directory listing, and the script's output during an update.

```bash
cat /code/judge-hosts-list
judge1.example.com:9998
judge2.example.com:9998
judge3.example.com:9998
```

```bash
ls /export/problems | head -n 5
apio
bbc
bkoi
broi
btoi
```

```bash
./vm-host-problem-watch.sh /export/problems /code/judge-host-list
Tue Oct  6 22:17:37 UTC 2020: Start watching /export/problems, notifying /code/judge-host-list
Tue Oct  6 22:17:46 UTC 2020: Update problems [/export/problems/rgss/17/rgpc17p5/ MOVED_FROM init.yml]
Tue Oct  6 22:17:46 UTC 2020 [judge1.example.com:9998]: As you wish.
Tue Oct  6 22:17:46 UTC 2020 [judge2.example.com:9998]: As you wish.
Tue Oct  6 22:17:46 UTC 2020 [judge3.example.com:9998]: As you wish.
```

--------------------------------

### Install DMOJ Judge (Stable Build)

Source: https://github.com/vnoi-admin/judge-server/blob/master/README.md

Use this command to install the latest stable version of the DMOJ judge from PyPI. This is the simplest way to get started.

```bash
$ pip install dmoj
```

--------------------------------

### Install DMOJ Judge (Bleeding-Edge Build)

Source: https://github.com/vnoi-admin/judge-server/blob/master/README.md

Clone the repository and install the judge from source for the latest features. This method is recommended for development or if you need the most up-to-date code.

```bash
git clone --recursive https://github.com/DMOJ/judge-server.git
cd judge-server
pip install -e .
```

--------------------------------

### DMOJ Judge Server Help

Source: https://github.com/vnoi-admin/judge-server/blob/master/README.md

Displays the help message for the dmoj command, showing available arguments for running a judge server. Use this to understand configuration and connection options.

```bash
$ dmoj --help
usage: dmoj [-h] [-p SERVER_PORT] -c CONFIG [-l LOG_FILE] [--no-watchdog]
            [-a API_PORT] [-A API_HOST] [-s] [-k] [-T TRUSTED_CERTIFICATES]
            [-e ONLY_EXECUTORS | -x EXCLUDE_EXECUTORS] [--no-ansi]
            server_host [judge_name] [judge_key]

Spawns a judge for a submission server.

positional arguments:
  server_host           host to connect for the server
  judge_name            judge name (overrides configuration)
  judge_key             judge key (overrides configuration)

optional arguments:
  -h, --help            show this help message and exit
  -p SERVER_PORT, --server-port SERVER_PORT
                        port to connect for the server
  -c CONFIG, --config CONFIG
                        file to load judge configurations from
  -l LOG_FILE, --log-file LOG_FILE
                        log file to use
  --no-watchdog         disable use of watchdog on problem directories
  -a API_PORT, --api-port API_PORT
                        port to listen for the judge API (do not expose to
                        public, security is left as an exercise for the
                        reverse proxy)
  -A API_HOST, --api-host API_HOST
                        IPv4 address to listen for judge API
  -s, --secure          connect to server via TLS
  -k, --no-certificate-check
                        do not check TLS certificate
  -T TRUSTED_CERTIFICATES, --trusted-certificates TRUSTED_CERTIFICATES
                        use trusted certificate file instead of system
  -e ONLY_EXECUTORS, --only-executors ONLY_EXECUTORS
                        only listed executors will be loaded (comma-separated)
  -x EXCLUDE_EXECUTORS, --exclude-executors EXCLUDE_EXECUTORS
                        prevent listed executors from loading (comma-
                        separated)
  --no-ansi             disable ANSI output
  --skip-self-test      skip executor self-tests

```

--------------------------------

### Build and Run DMOJ Judge with Docker (Tier 1)

Source: https://github.com/vnoi-admin/judge-server/blob/master/README.md

This command sequence clones the judge-server repository, navigates to the Docker directory, builds a tier 1 judge image, and then runs it as a detached container. It configures networking, volume mounts for problems and configuration, and necessary capabilities. Ensure environment variables like BRIDGE_ADDRESS, JUDGE_NAME, and JUDGE_KEY are set.

```bash
git clone --recursive https://github.com/DMOJ/judge-server.git
cd judge-server/.docker
make judge-tier1
exec docker run \
    --name judge \
    -p "$(ip addr show dev enp1s0 | perl -ne 'm@inet (.*)/.*@ and print$1 and exit')":9998:9998 \
    -v /mnt/problems:/problems \
    --cap-add=SYS_PTRACE \
    -d \
    --restart=always \
    dmoj/judge-tier1:latest \
    run -p15001 -s -c /problems/judge.yml \
    "$BRIDGE_ADDRESS" "$JUDGE_NAME" "$JUDGE_KEY"
```

--------------------------------

### DMOJ CLI Judge Help

Source: https://github.com/vnoi-admin/judge-server/blob/master/README.md

Displays the help message for the dmoj-cli command, showing available arguments for running a CLI judge. Use this to configure executor loading and output.

```bash
$ dmoj-cli --help
usage: dmoj-cli [-h] -c CONFIG
                [-e ONLY_EXECUTORS | -x EXCLUDE_EXECUTORS]
                [--no-ansi]

Spawns a judge for a submission server.

optional arguments:
  -h, --help            show this help message and exit
  -c CONFIG, --config CONFIG
                        file to load judge configurations from
  -e ONLY_EXECUTORS, --only-executors ONLY_EXECUTORS
                        only listed executors will be loaded (comma-separated)
  -x EXCLUDE_EXECUTORS, --exclude-executors EXCLUDE_EXECUTORS
                        prevent listed executors from loading (comma-
                        separated)
  --no-ansi             disable ANSI output
  --skip-self-test      skip executor self-tests

```

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