refactor(script): extract script content into a variable for cleaner docker run command

.github/scripts/allocator_bench_alpine.sh

@@ -6,47 +6,50 @@ if [[ "${TOKIO_MULTI_THREAD:-false}" == "true" ]]; then
   TOKIO_FEATURE="tokio-multi-thread"
 fi
 
+ALPINE_SCRIPT=$(cat <<'EOF'
+set -eu
+apk add --no-cache build-base pkgconfig time
+
+build_features() {
+  allocator="$1"
+  features=""
+  if [ "$allocator" != "system" ]; then
+    features="$allocator"
+  fi
+  if [ -n "$TOKIO_FEATURE" ]; then
+    if [ -n "$features" ]; then
+      features="$features,$TOKIO_FEATURE"
+    else
+      features="$TOKIO_FEATURE"
+    fi
+  fi
+  echo "$features"
+}
+
+: > /work/alpine-results.tsv
+for allocator in system jemalloc mimalloc_v2 mimalloc_v3; do
+  features="$(build_features "$allocator")"
+  if [ -n "$features" ]; then
+    output="$(/usr/bin/time -v cargo run --release --locked --features "$features" 2>&1 >/dev/null)"
+  else
+    output="$(/usr/bin/time -v cargo run --release --locked 2>&1 >/dev/null)"
+  fi
+  peak="$(echo "$output" | awk -F': ' '/Maximum resident set size/ {print $2; exit}')"
+  if [ -z "$peak" ]; then
+    echo "Failed to parse peak memory for $allocator" >&2
+    exit 1
+  fi
+  printf "%s\t%s\n" "$allocator" "$peak" >> /work/alpine-results.tsv
+done
+EOF
+)
+
 docker run --rm \
   -v "$PWD:/work" \
   -w /work \
   -e TOKIO_FEATURE="$TOKIO_FEATURE" \
   -e PLATFORM_LABEL="${PLATFORM_LABEL:-unknown}" \
-  rust:nightly-alpine sh -lc '
-    set -eu
-    apk add --no-cache build-base pkgconfig time
-
-    build_features() {
-      allocator="$1"
-      features=""
-      if [ "$allocator" != "system" ]; then
-        features="$allocator"
-      fi
-      if [ -n "$TOKIO_FEATURE" ]; then
-        if [ -n "$features" ]; then
-          features="$features,$TOKIO_FEATURE"
-        else
-          features="$TOKIO_FEATURE"
-        fi
-      fi
-      echo "$features"
-    }
-
-    : > /work/alpine-results.tsv
-    for allocator in system jemalloc mimalloc_v2 mimalloc_v3; do
-      features="$(build_features "$allocator")"
-      if [ -n "$features" ]; then
-        output="$(/usr/bin/time -v cargo run --release --locked --features "$features" 2>&1 >/dev/null)"
-      else
-        output="$(/usr/bin/time -v cargo run --release --locked 2>&1 >/dev/null)"
-      fi
-      peak="$(echo "$output" | awk -F': ' '/Maximum resident set size/ {print $2; exit}')"
-      if [ -z "$peak" ]; then
-        echo "Failed to parse peak memory for $allocator" >&2
-        exit 1
-      fi
-      printf "%s\t%s\n" "$allocator" "$peak" >> /work/alpine-results.tsv
-    done
-  '
+  rust:nightly-alpine sh -lc "$ALPINE_SCRIPT"
 
 {
   echo "### ${PLATFORM_LABEL:-unknown} (tokio-multi-thread=${TOKIO_MULTI_THREAD:-false})"