devx: add Xcode problem matcher; add tools/fetch-latest-ci-logs.sh; enable matcher in CI

Author: arnabwahid

.github/problem-matchers/xcodebuild.json

@@ -0,0 +1,18 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "xcodebuild",
+      "pattern": [
+        {
+          "regexp": "^(.*?):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "severity": 4,
+          "message": 5
+        }
+      ]
+    }
+  ]
+}
+

.github/workflows/ci.yml

@@ -27,6 +27,9 @@ jobs:
         run: |
           rm -rf "$LOG_DIR" && mkdir -p "$LOG_DIR"
 
+      - name: Enable Xcode problem matcher
+        run: echo "::add-matcher::.github/problem-matchers/xcodebuild.json"
+
       - name: Install xcpretty
         run: |
           gem install xcpretty --no-document

tools/fetch-latest-ci-logs.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Fetch the latest ci-logs artifact for a branch (default: dev) using GitHub CLI
+# Requirements: gh CLI authenticated (GH_TOKEN or gh auth login)
+# Usage:
+#   tools/fetch-latest-ci-logs.sh [branch] [output_dir]
+#   tools/fetch-latest-ci-logs.sh --run <run-id> [output_dir]
+#   tools/fetch-latest-ci-logs.sh --help
+
+usage() {
+  cat <<EOF
+Fetch latest ci-logs artifact from GitHub Actions.
+
+Usage:
+  $(basename "$0") [branch] [output_dir]
+  $(basename "$0") --run <run-id> [output_dir]
+
+Examples:
+  $(basename "$0")                 # fetch from branch 'dev' into ./ci_logs
+  $(basename "$0") main ./out      # fetch from branch 'main' into ./out
+  $(basename "$0") --run 123456789  # fetch by run id into ./ci_logs
+
+Notes:
+  - Requires 'gh' CLI with repo read access. Run: gh auth login
+  - Artifact name expected: ci-logs (from CI workflow)
+EOF
+}
+
+if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
+  usage; exit 0
+fi
+
+if ! command -v gh >/dev/null 2>&1; then
+  echo "Error: 'gh' CLI not found. Install from https://cli.github.com/" >&2
+  exit 1
+fi
+
+ARTIFACT_NAME="ci-logs"
+BRANCH="dev"
+RUN_ID=""
+OUTDIR="ci_logs"
+
+if [[ "${1:-}" == "--run" ]]; then
+  RUN_ID="${2:-}"
+  if [[ -z "$RUN_ID" ]]; then echo "Error: --run requires a run id" >&2; exit 2; fi
+  OUTDIR="${3:-$OUTDIR}"
+else
+  BRANCH="${1:-$BRANCH}"
+  OUTDIR="${2:-$OUTDIR}"
+fi
+
+mkdir -p "$OUTDIR"
+
+if [[ -n "$RUN_ID" ]]; then
+  echo "Downloading artifact '$ARTIFACT_NAME' from run $RUN_ID into $OUTDIR ..."
+  gh run download "$RUN_ID" --name "$ARTIFACT_NAME" --dir "$OUTDIR"
+else
+  echo "Resolving latest run on branch '$BRANCH' ..."
+  RUN_ID=$(gh run list --branch "$BRANCH" --limit 1 --json databaseId --jq '.[0].databaseId')
+  if [[ -z "$RUN_ID" || "$RUN_ID" == "null" ]]; then
+    echo "Error: No runs found on branch '$BRANCH'" >&2
+    exit 3
+  fi
+  echo "Downloading artifact '$ARTIFACT_NAME' from run $RUN_ID into $OUTDIR ..."
+  gh run download "$RUN_ID" --name "$ARTIFACT_NAME" --dir "$OUTDIR"
+fi
+
+echo "Downloaded files:"
+find "$OUTDIR" -maxdepth 2 -type f -print
+
+SUMMARY_FILE="$OUTDIR/ci-logs/ci_summary.txt"
+if [[ -f "$SUMMARY_FILE" ]]; then
+  echo
+  echo "--- CI Summary (tail) ---"
+  tail -n 200 "$SUMMARY_FILE" || true
+fi
+
+echo "Done."
+