initial: NAS agent runner setup

job-prepare.sh

@@ -0,0 +1,90 @@
+#!/usr/bin/env bash
+# job-prepare.sh — zet een per-job working tree op
+#
+# Usage: job-prepare.sh <job_id> <repo_url>
+#
+# Strategie:
+#   1. Bare cache van de repo onderhouden in $AGENT_REPO_CACHE/<slug>.git
+#   2. Vers fetchen voor we clonen (laatste main-state)
+#   3. `git clone --reference --dissociate` zodat objects gedeeld worden
+#      (snelle clone, schone working tree)
+#   4. `npm install` met cache-share via $NPM_CONFIG_CACHE
+#
+# Output (laatste regel): pad van de working tree, voor `cd`-gebruik.
+
+set -uo pipefail
+
+source /opt/agent/bin/_lib.sh
+
+: "${AGENT_REPO_CACHE:=/var/cache/repos}"
+: "${AGENT_JOB_ROOT:=/tmp}"
+: "${AGENT_LOG_DIR:=/var/log/agent}"
+
+JOB_ID="${1:-}"
+REPO_URL="${2:-}"
+
+if [[ -z "$JOB_ID" || -z "$REPO_URL" ]]; then
+    log "usage: $0 <job_id> <repo_url>"
+    exit 2
+fi
+
+# Slug uit repo_url voor de cache-naam: "github.com/foo/bar.git" → "foo_bar"
+SLUG=$(echo "$REPO_URL" \
+    | sed -E 's#^.*[:/]([^/]+/[^/]+?)(\.git)?/?$#\1#' \
+    | tr '/' '_')
+
+CACHE_DIR="${AGENT_REPO_CACHE}/${SLUG}.git"
+WORK_DIR="${AGENT_JOB_ROOT}/job-${JOB_ID}"
+JOB_LOG="${AGENT_LOG_DIR}/jobs/${JOB_ID}.log"
+
+mkdir -p "$(dirname "$JOB_LOG")"
+
+{
+    log "preparing job ${JOB_ID} from ${REPO_URL}"
+    log "cache=${CACHE_DIR} work=${WORK_DIR}"
+
+    # ----- 1. ensure bare cache ------------------------------------
+    if [[ ! -d "$CACHE_DIR" ]]; then
+        log "cache miss — bare-cloning ${REPO_URL}"
+        git clone --bare --filter=blob:none "$REPO_URL" "$CACHE_DIR"
+    else
+        log "cache hit — fetching latest"
+        git -C "$CACHE_DIR" fetch --all --prune --quiet
+    fi
+
+    # ----- 2. fresh working tree -----------------------------------
+    if [[ -d "$WORK_DIR" ]]; then
+        log "stale work dir found — removing"
+        rm -rf "$WORK_DIR"
+    fi
+
+    log "cloning via reference"
+    git clone \
+        --reference "$CACHE_DIR" \
+        --dissociate \
+        --quiet \
+        "$REPO_URL" "$WORK_DIR"
+
+    # ----- 3. branch -----------------------------------------------
+    BRANCH="agent/job-${JOB_ID}"
+    git -C "$WORK_DIR" checkout -B "$BRANCH"
+    log "checked out ${BRANCH} from $(git -C "$WORK_DIR" rev-parse --short HEAD)"
+
+    # ----- 4. install deps -----------------------------------------
+    if [[ -f "$WORK_DIR/package-lock.json" ]]; then
+        log "running npm ci (cache=${NPM_CONFIG_CACHE})"
+        ( cd "$WORK_DIR" && npm ci --no-audit --no-fund --prefer-offline ) \
+            || log "WARN: npm ci failed (continuing — agent kan zelf decide)"
+    elif [[ -f "$WORK_DIR/package.json" ]]; then
+        log "no lockfile — running npm install"
+        ( cd "$WORK_DIR" && npm install --no-audit --no-fund --prefer-offline ) \
+            || log "WARN: npm install failed"
+    else
+        log "no package.json — skipping install"
+    fi
+
+    log "ready: ${WORK_DIR}"
+} >> "$JOB_LOG" 2>&1
+
+# Output naar stdout zodat Claude het pad kan parsen.
+echo "$WORK_DIR"