Implement date-checker

.github/workflows/date-check.yml

@@ -0,0 +1,44 @@
+name: Date-Check
+
+on:
+  schedule:
+    # Run at noon UTC every 1st of the month
+    - cron: '00 12 01 * *'
+
+  # Allow manually starting the workflow
+  workflow_dispatch:
+
+jobs:
+  date-check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+
+      - name: Run `date-check`
+        working-directory: ci/date-check
+        run: |
+          cargo run -- ../../src/ > ../../date-check-output.txt
+
+      - name: Open issue
+        uses: actions/github-script@v3
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          script: |
+            const fs = require('fs');
+
+            const rawText = fs.readFileSync('date-check-output.txt', { encoding: 'utf8' });
+            const title = rawText.split('\n')[0];
+            if (title != 'empty') {
+                const body = rawText.split('\n').slice(1).join('\n');
+                github.issues.create({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  title,
+                  body,
+                });
+                console.log('Opened issue.');
+            } else {
+                console.log('No dates to triage.');
+            }

.gitignore

@@ -1,4 +1,6 @@
 book
 
-# prevent accidentally changes
+# prevent accidental changes
 book.toml
+
+ci/date-check/target/

ci/date-check/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "date-check"
+version = "0.1.0"
+authors = ["Camelid <[email protected]>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+glob = "0.3"
+regex = "1"
+chrono = "0.4"