added workflow to trigger github actions to auto run/gen mainnet node tables (#44)

Signed-off-by: krystal <56278409+theekrystallee@users.noreply.github.com>

Author: theekrystallee

.github/workflows/update-node-tables.yml

@@ -0,0 +1,30 @@
+name: Update Node Tables
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+
+jobs:
+  update-tables:
+    runs-on: hashgraph-docs-linux-medium
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Install dependencies
+        run: sudo apt-get install -y jq
+
+      - name: Run update script
+        run: ./update_node_list.sh
+
+      - name: Commit changes
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add networks/mainnet/mainnet-nodes/README.md
+          git commit -m "chore: update node tables" || echo "No changes to commit"
+          git push

update_node_tables.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ─── configuration ───
+BASE_URL="https://mainnet.mirrornode.hedera.com/api/v1/network/nodes?file.id=0.0.102&limit=100&order=asc"
+PAGE2_URL="${BASE_URL}&node.id=gt:27"
+DOC_FILE="networks/mainnet/mainnet-nodes/README.md"
+
+TABLE_A_START="<!-- TABLE A START -->"
+TABLE_A_END="<!-- TABLE A END -->"
+TABLE_B_START="<!-- TABLE B START -->"
+TABLE_B_END="<!-- TABLE B END -->"
+
+# ─── fetch page 1 and page 2 ───
+resp1=$(curl -sS --fail --max-time 10 "$BASE_URL")
+resp2=$(curl -sS --fail --max-time 10 "$PAGE2_URL")
+
+# write each nodes array to a temp file
+tmp1=$(mktemp)
+tmp2=$(mktemp)
+jq '.nodes' <<<"$resp1" > "$tmp1"
+jq '.nodes' <<<"$resp2" > "$tmp2"
+
+# merge into one array
+all_nodes=$(jq -s '.[0] + .[1]' "$tmp1" "$tmp2")
+
+# clean up
+rm "$tmp1" "$tmp2"
+
+
+node_count=$(jq 'length' <<<"$all_nodes")
+echo "ℹ️  found $node_count total nodes after merging pages"
+[ "$node_count" -eq 0 ] && { echo "⚠️  no nodes found; aborting"; exit 1; }
+
+nodes_json="$all_nodes"
+
+# ─── build Table A (node_id ≤ 15) ───
+tableA_header="| Node | Node ID | Node Account ID | Endpoints | Node Certificate Thumbprint |
+|------|---------|-----------------|-----------|-----------------------------|
+"
+tableA_rows=$(jq -r '
+  map(select(.node_id >= 0))
+  | map({
+      node:      (.description | capture("Hosted by (?<node>[^|]+) \\|").node),
+      id:        .node_id,
+      acct:      .node_account_id,
+      endpoints: [.service_endpoints[] | "\(.ip_address_v4):\(.port)"],
+      thumb:     .node_cert_hash
+    })
+  | sort_by(.id)
+  | .[]
+  | "| \(.node) | \(.id) | \(.acct) | \(.endpoints | join(", ")) | \(.thumb) |"
+' <<<"$nodes_json")
+tableA_content="${tableA_header}${tableA_rows}"
+
+# ─── build Table B (node_id > 15) ───
+tableB_header="| Node Account ID | Public Key |
+|-----------------|-----------------------------|
+"
+tableB_rows=$(jq -r '
+  map(select(.node_id >= 0))
+  | sort_by(.node_id)
+  | map({
+      acct: .node_account_id,
+      key:  .public_key
+    })
+  | .[]
+  | "| \(.acct) | \(.key) |"
+' <<<"$nodes_json")
+tableB_content="${tableB_header}${tableB_rows}"
+
+# ─── injection helper via awk ───
+inject_table() {
+  local file="$1" start="$2" end="$3" table_file="$4"
+  cp "$file" "${file}.bak"
+  awk -v start="$start" -v end="$end" -v tf="$table_file" '
+    $0 == start { print; while ((getline line < tf) > 0) print line; inblock=1; next }
+    $0 == end   { inblock=0; print; next }
+    !inblock    { print }
+  ' "$file" > "${file}.tmp" && mv "${file}.tmp" "$file"
+}
+
+# ─── write and inject Table A ───
+TABLE_A_FILE=$(mktemp)
+printf '%s\n' "$tableA_content" > "$TABLE_A_FILE"
+inject_table "$DOC_FILE" "$TABLE_A_START" "$TABLE_A_END" "$TABLE_A_FILE"
+rm "$TABLE_A_FILE"
+
+# ─── write and inject Table B ───
+TABLE_B_FILE=$(mktemp)
+printf '%s\n' "$tableB_content" > "$TABLE_B_FILE"
+inject_table "$DOC_FILE" "$TABLE_B_START" "$TABLE_B_END" "$TABLE_B_FILE"
+rm "$TABLE_B_FILE"
+
+echo "✅  Updated $DOC_FILE with merged pages and two tables"