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feat: sync neetcode submissions into blog posts
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‎.github/workflows/sync-neetcode-post.yml‎

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name: Sync NeetCode Post
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on:
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repository_dispatch:
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types:
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- neetcode_submission_synced
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workflow_dispatch:
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inputs:
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problem_slug:
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description: Problem slug from NeetCode submissions
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required: true
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type: string
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language:
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description: Submission language
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required: true
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type: string
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submission_path:
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description: Path to the submission file in the source repository
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required: true
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type: string
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source_sha:
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description: Commit SHA in the source repository
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required: true
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type: string
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problem_title:
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description: Optional resolved problem title
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required: false
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type: string
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synced_at:
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description: Optional sync timestamp in ISO-8601
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required: false
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type: string
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permissions:
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contents: write
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concurrency:
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group: neetcode-blog-sync
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cancel-in-progress: false
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jobs:
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sync:
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runs-on: ubuntu-latest
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steps:
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- name: Checkout release branch
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uses: actions/checkout@v4
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with:
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ref: release
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- name: Resolve dispatch payload
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id: payload
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env:
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INPUT_PROBLEM_SLUG: ${{ inputs.problem_slug }}
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INPUT_LANGUAGE: ${{ inputs.language }}
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INPUT_SUBMISSION_PATH: ${{ inputs.submission_path }}
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INPUT_SOURCE_SHA: ${{ inputs.source_sha }}
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INPUT_PROBLEM_TITLE: ${{ inputs.problem_title }}
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INPUT_SYNCED_AT: ${{ inputs.synced_at }}
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PAYLOAD_PROBLEM_SLUG: ${{ github.event.client_payload.problem_slug }}
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PAYLOAD_LANGUAGE: ${{ github.event.client_payload.language }}
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PAYLOAD_SUBMISSION_PATH: ${{ github.event.client_payload.submission_path }}
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PAYLOAD_SOURCE_SHA: ${{ github.event.client_payload.source_sha }}
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PAYLOAD_SOURCE_REPO: ${{ github.event.client_payload.source_repo }}
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PAYLOAD_PROBLEM_TITLE: ${{ github.event.client_payload.problem_title }}
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PAYLOAD_SYNCED_AT: ${{ github.event.client_payload.synced_at }}
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run: |
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set -euo pipefail
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problem_slug="${INPUT_PROBLEM_SLUG:-${PAYLOAD_PROBLEM_SLUG:-}}"
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language="${INPUT_LANGUAGE:-${PAYLOAD_LANGUAGE:-}}"
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submission_path="${INPUT_SUBMISSION_PATH:-${PAYLOAD_SUBMISSION_PATH:-}}"
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source_sha="${INPUT_SOURCE_SHA:-${PAYLOAD_SOURCE_SHA:-}}"
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source_repo="${PAYLOAD_SOURCE_REPO:-devbattery/neetcode-submissions}"
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problem_title="${INPUT_PROBLEM_TITLE:-${PAYLOAD_PROBLEM_TITLE:-}}"
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synced_at="${INPUT_SYNCED_AT:-${PAYLOAD_SYNCED_AT:-}}"
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if [ -z "$problem_slug" ] || [ -z "$language" ] || [ -z "$submission_path" ] || [ -z "$source_sha" ]; then
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echo "Missing required NeetCode sync payload." >&2
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exit 1
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fi
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if [ -z "$synced_at" ]; then
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synced_at="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
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fi
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{
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printf 'problem_slug=%s\n' "$problem_slug"
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printf 'language=%s\n' "$language"
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printf 'submission_path=%s\n' "$submission_path"
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printf 'source_sha=%s\n' "$source_sha"
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printf 'source_repo=%s\n' "$source_repo"
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printf 'problem_title=%s\n' "$problem_title"
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printf 'synced_at=%s\n' "$synced_at"
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} >> "$GITHUB_OUTPUT"
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- name: Set up Node.js
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uses: actions/setup-node@v4
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with:
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node-version: 20
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- name: Checkout NeetCode source repository
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uses: actions/checkout@v4
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with:
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repository: ${{ steps.payload.outputs.source_repo }}
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ref: ${{ steps.payload.outputs.source_sha }}
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path: .neetcode-source
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fetch-depth: 0
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- name: Sync post markdown
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id: sync
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env:
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BLOG_ROOT: ${{ github.workspace }}
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SOURCE_ROOT: ${{ github.workspace }}/.neetcode-source
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SOURCE_REPO: ${{ steps.payload.outputs.source_repo }}
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PROBLEM_SLUG: ${{ steps.payload.outputs.problem_slug }}
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LANGUAGE: ${{ steps.payload.outputs.language }}
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SUBMISSION_PATH: ${{ steps.payload.outputs.submission_path }}
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SOURCE_SHA: ${{ steps.payload.outputs.source_sha }}
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PROBLEM_TITLE: ${{ steps.payload.outputs.problem_title }}
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SYNCED_AT: ${{ steps.payload.outputs.synced_at }}
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run: |
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set -euo pipefail
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post_path="$(node scripts/sync-neetcode-post.mjs | tail -n 1)"
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printf 'post_path=%s\n' "$post_path" >> "$GITHUB_OUTPUT"
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- name: Set up Ruby
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uses: ruby/setup-ruby@v1
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with:
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ruby-version: 3.3
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bundler-cache: true
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- name: Build site
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run: bundle exec jekyll build
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- name: Commit and push
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id: commit
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run: |
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set -euo pipefail
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git config user.name "github-actions[bot]"
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git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
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git add -A _posts
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if git diff --cached --quiet; then
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echo "committed=false" >> "$GITHUB_OUTPUT"
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echo "No NeetCode post changes to commit."
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exit 0
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fi
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git commit -m "chore(neetcode): sync ${{ steps.payload.outputs.problem_slug }}"
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git push origin release
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echo "committed=true" >> "$GITHUB_OUTPUT"

‎docs/examples/neetcode-dispatch-blog-sync.yml‎

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name: Dispatch Blog Sync
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on:
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push:
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branches:
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- main
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permissions:
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contents: read
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jobs:
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dispatch:
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runs-on: ubuntu-latest
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steps:
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- name: Checkout repository
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uses: actions/checkout@v4
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- name: Collect changed submission files
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id: changes
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env:
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BEFORE_SHA: ${{ github.event.before }}
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AFTER_SHA: ${{ github.sha }}
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run: |
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set -euo pipefail
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zero_sha="0000000000000000000000000000000000000000"
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if [ "${BEFORE_SHA:-}" = "$zero_sha" ] || [ -z "${BEFORE_SHA:-}" ]; then
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changed_files="$(git show --pretty='' --name-only "$AFTER_SHA" || true)"
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else
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changed_files="$(git diff --name-only --diff-filter=AM "$BEFORE_SHA" "$AFTER_SHA" || true)"
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fi
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submission_files="$(printf '%s\n' "$changed_files" | grep '/submission-.*\.[^/]*$' || true)"
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if [ -z "$submission_files" ]; then
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echo "has_changes=false" >> "$GITHUB_OUTPUT"
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exit 0
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fi
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echo "has_changes=true" >> "$GITHUB_OUTPUT"
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{
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echo "files<<EOF"
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printf '%s\n' "$submission_files"
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echo "EOF"
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} >> "$GITHUB_OUTPUT"
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- name: Dispatch blog sync events
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if: steps.changes.outputs.has_changes == 'true'
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env:
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BLOG_REPO_DISPATCH_TOKEN: ${{ secrets.BLOG_REPO_DISPATCH_TOKEN }}
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SOURCE_REPO: ${{ github.repository }}
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SOURCE_SHA: ${{ github.sha }}
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SYNCED_AT: ${{ github.event.head_commit.timestamp }}
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CHANGED_FILES: ${{ steps.changes.outputs.files }}
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run: |
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set -euo pipefail
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if [ -z "${BLOG_REPO_DISPATCH_TOKEN:-}" ]; then
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echo "BLOG_REPO_DISPATCH_TOKEN is required." >&2
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exit 1
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fi
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sync_timestamp="${SYNCED_AT:-$(date -u +%Y-%m-%dT%H:%M:%SZ)}"
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while IFS= read -r file_path; do
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[ -z "$file_path" ] && continue
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problem_slug="$(basename "$(dirname "$file_path")")"
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extension="${file_path##*.}"
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case "$extension" in
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py) language="python" ;;
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js) language="javascript" ;;
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ts) language="typescript" ;;
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java) language="java" ;;
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cpp) language="cpp" ;;
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cs) language="csharp" ;;
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go) language="go" ;;
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rs) language="rust" ;;
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kt) language="kotlin" ;;
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swift) language="swift" ;;
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sql) language="sql" ;;
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*) language="$extension" ;;
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esac
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payload="$(jq -nc \
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--arg event_type "neetcode_submission_synced" \
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--arg source_repo "$SOURCE_REPO" \
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--arg source_sha "$SOURCE_SHA" \
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--arg synced_at "$sync_timestamp" \
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--arg problem_slug "$problem_slug" \
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--arg language "$language" \
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--arg submission_path "$file_path" \
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'{
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event_type: $event_type,
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client_payload: {
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source_repo: $source_repo,
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source_sha: $source_sha,
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synced_at: $synced_at,
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problem_slug: $problem_slug,
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language: $language,
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submission_path: $submission_path
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}
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}')"
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curl -fsSL \
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-X POST \
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-H "Accept: application/vnd.github+json" \
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-H "Authorization: Bearer $BLOG_REPO_DISPATCH_TOKEN" \
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-H "X-GitHub-Api-Version: 2022-11-28" \
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https://api.github.com/repos/devbattery/devbattery.github.io/dispatches \
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-d "$payload"
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done <<< "$CHANGED_FILES"

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