build: add build task for deploy repos to use

The build task collects runtime files into the ./dist dir. This is
useful for separate deployment repos to deploy anonystat using the
deployctl action.

.gitignore

@@ -4,3 +4,4 @@
 *.lcov
 /cov_profile
 /html_cov
+/dist

deno.json

@@ -12,7 +12,8 @@
     "clean-cov": "rm -rf html_cov cov.lcov cov_profile",
     "cov-html": "deno coverage --lcov --output=cov.lcov cov_profile/ && genhtml -o html_cov cov.lcov",
     "serve-cov": "deno run --allow-net --allow-read --allow-sys https://deno.land/std/http/file_server.ts html_cov",
-    "cov": "deno task clean-cov && deno task test-cov && deno task cov-html && deno task serve-cov"
+    "cov": "deno task clean-cov && deno task test-cov && deno task cov-html && deno task serve-cov",
+    "build": "scripts/build.sh"
   },
   "deploy": {
     "exclude": [

scripts/build.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Collect anonystat files needed at runtime into $OUT_DIR (./dist by default).
+# This must be run from the repo root.
+
+OUT_DIR=${OUT_DIR:-dist}
+mkdir -p "${OUT_DIR:?}"
+
+# Include the deno.json/deno.lock with the hope that Deno Deploy uses the
+# lockfile when resolving deps. I can't find any documentation that indicates
+# whether it does or not though.
+git ls-files . \
+    | grep -P '^(.*\.ts|deno.json|deno.lock)$' \
+    | grep -Pv '_test(ing)?\b|scripts/' \
+    | xargs -I{} install -D --mode a=r,u+w {} "${OUT_DIR:?}/{}"
+
+echo "anonystat runtime files collected in ${OUT_DIR:?}" >&2