Add GPTReview With GitHub Example

examples/gptreview-ghaction/README.md

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+# GPTReview
+
+This folder contains an example of building and implementing your own code reviewer as part of GitHub Actions. 
+
+Below are the files present here:
+
+- `codereview.gpt`: Contains the GPTScript code and prompts.
+- `workflow.yaml`: The workflow file for the GitHub action.
+
+## Pre-requisites
+
+- GitHub Account
+- OpenAI API Key
+
+## How To Run This Example
+
+- Create a new repository in your GitHub account and create a `codereview.gpt` file in the root of that repo based on the contents provided in this file.
+- Congfigure a GitHub Action for that repository. To do so, navigate to the "Actions" tab and then click on "setup a workflow yourself" link. This will create a new `main.yaml` inside `.github/workflows` path. Copy the contents from `workflow.yaml` to your `main.yaml`.
+- Configure your `OPENAI_API_KEY` and `GH_TOKEN` as environment variables in your GitHub repo. Refer to [these steps](https://docs.github.com/en/actions/learn-github-actions/variables#creating-configuration-variables-for-a-repository) to create environment variables for your repository.
+- Create a new branch, and add some code file to the repository and open a new pull request.
+- The GitHub Action will trigger and our GPTReview will review your code and provide review comments.

examples/gptreview-ghaction/codereview.gpt

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+Name: Code Reviewer
+Description: A tool to help you perform code review of open PRs
+Context: learn-gh
+Tools: sys.exec, sys.http.html2text?, sys.find, sys.read, sys.write
+Args: PR_URL: The GitHub PR_URL
+
+You have the gh cli available to you. Use it to perform code review for a pr from the $(repo) provided.
+
+Perform the following steps in order:
+1. Identify the files changed in the pull request ($PR_URL) using the pr number and perform a diff.
+    1. Analyze the complete code of each identified file and perform a detailed line by line code review.
+    2. Repeat the process for each changed file in the pr.
+2. Share your review comments separately for each file.
+3. In a new line write "Code: Approved" or "Code: Require Changes" based on the review comments.
+---
+Name: learn-gh
+Description: A tool to help you learn gh cli
+
+#!/usr/bin/env bash
+
+echo "The following is the help text for the gh cli and some of its sub-commands. Use these when figuring out how to construct new commands.  Note that the --search flag is used for filtering and sorting as well; there is no dedicate --sort flag."
+gh --help
+gh repo --help
+gh pr --help
+gh pr checkout --help
+gh pr diff --help

examples/gptreview-ghaction/workflow.yaml

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+name: PR Review with GPTScript
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  pr_review:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Get PR Details
+      id: pr_details
+      run: |
+        PR_URL=$(jq -r '.pull_request.html_url' $GITHUB_EVENT_PATH)
+        PR_NUMBER=$(jq -r '.pull_request.number' $GITHUB_EVENT_PATH)
+        PR_FILES=$(jq -r '.pull_request.changed_files' $GITHUB_EVENT_PATH)
+        echo "PR_URL=${PR_URL}" >> $GITHUB_ENV
+        echo "PR_NUMBER=${PR_NUMBER}" >> $GITHUB_ENV
+        echo "PR_FILES=${PR_FILES}" >> $GITHUB_ENV
+
+    - name: Install GPTScript
+      run: curl https://get.gptscript.ai/install.sh | sh
+
+    - name: Run GPTScript for Code Review
+      id: run_gptscript
+      env:
+        OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+        GH_TOKEN: ${{ secrets.GH_TOKEN }}
+      run: |
+        {
+        echo 'REVIEW<<EOF'
+        gptscript codereview.gpt --PR_URL=${{ env.PR_URL }}
+        echo EOF
+        } >> "$GITHUB_ENV"
+
+
+    - name: Post Review Comment
+      env:
+        GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
+      run: |
+        gh pr comment ${{ github.event.pull_request.number }} --body "$REVIEW"
+
+    - name: Set PR Status Fail
+      if: contains(env.REVIEW, 'Require Changes')
+      run: |
+       echo "Code Requires Changes"
+       exit 1
+
+    - name: Set PR Status Pass
+      if: contains(env.REVIEW, 'Approved')
+      run: |
+       echo "Code Approved"
+