add leaderboard.yml

Author: fxnn

.github/workflows/leaderboard.yml

@@ -0,0 +1,25 @@
+name: Leaderboard
+
+on:
+  push:
+    branches: [ "main" ]
+  workflow_dispatch: {}
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Update Leaderboard in README.md
+      run: ./leaderboard-replace.sh
+
+    - name: Commit and Push changes
+      run: |
+        git config --global user.name "${GITHUB_ACTOR}"
+        git config --global user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+        git commit -am "README.md: update leaderboard" \
+          && git push \
+          || true
+

README.md

@@ -3,3 +3,9 @@ Advent of Code 2024
 
 See https://adventofcode.com/2024
 
+[//]: # (LEADERBOARD_BEGIN)
+
+> user **fxnn** (6 stars, last one at 2024-12-03T09:54:00Z)
+
+[//]: # (LEADERBOARD_END)
+

leaderboard-fetch.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+set -e
+set -o pipefail
+
+aoc_year=2024
+export aoc_username="fxnn"
+
+[ -z "${AOC_SESSION_COOKIE}" ] && { echo "ERROR: missing AOC_SESSION_COOKIE"; exit 1; }
+[ -z "${AOC_LEADERBOARD_ID}" ] && { echo "ERROR: missing AOC_LEADERBOARD_ID"; exit 1; }
+
+curl \
+  -sS \
+  -H "Cookie: ${AOC_SESSION_COOKIE}" \
+  https://adventofcode.com/${aoc_year}/leaderboard/private/view/${AOC_LEADERBOARD_ID}.json \
+  | jq -r \
+  '.members 
+  | values[] 
+  | select(.name==$ENV.aoc_username) 
+  | "user **" 
+  + .name 
+  + "** (" 
+  + (.stars | tostring) 
+  + " stars, last one at " 
+  + (.last_star_ts | todateiso8601) 
+  + ")"'
+

leaderboard-replace.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+set -e
+
+export leaderboard="$(./leaderboard-fetch.sh)"
+
+awk \
+  '
+  BEGIN {
+    isLeaderboard="false" ;
+    isLeaderboardPrinted="false" ;
+  }
+  /^.*\(LEADERBOARD_BEGIN\)$/ {
+    isLeaderboard="true" ;
+    isLeaderboardPrinted="false" ;
+    print $0 ;
+    next ;
+  }
+  /^.*\(LEADERBOARD_END\)$/ {
+    isLeaderboard="false" ;
+    print $0 ;
+    next ;
+  }
+  isLeaderboard=="true" && isLeaderboardPrinted=="false" {
+    print "" ;
+    print "> " ENVIRON["leaderboard"] ;
+    print "" ;
+    isLeaderboardPrinted="true" ;
+    next ;
+  }
+  isLeaderboard=="true" && isLeaderboardPrinted=="false" {
+    next ;
+  }
+  isLeaderboard=="false" {
+    print $0 ;
+  }
+  ' \
+  README.md \
+  > README.md.tmp
+
+mv README.md.tmp README.md
+