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+#
+msgid ""
+msgstr ""
+
+msgid "title: DIY bare bones CI server with Bash and Nix"
+msgstr ""
+
+msgid "date: 2020-11-12 3"
+msgstr ""
+
+msgid "layout: post"
+msgstr ""
+
+msgid "lang: en"
+msgstr ""
+
+msgid "ref: diy-bare-bones-ci-server-with-bash-and-nix"
+msgstr ""
+
+msgid ""
+"With a server with Nix installed (no need for NixOS), you can leverage its "
+"build isolation for running CI jobs by adding a [post-receive](https://git-"
+"scm.com/book/en/v2/Customizing-Git-Git-Hooks) Git hook to the server."
+msgstr ""
+
+msgid ""
+"In most of my project I like to keep a `test` attribute which runs the test "
+"with `nix-build -A test`. This way, a post-receive hook could look like:"
+msgstr ""
+
+msgid ""
+"#!/usr/bin/env bash\n"
+"set -Eeuo pipefail\n"
+"set -x\n"
+"\n"
+"LOGS_PREFIX=\"/data/static/ci-logs/libedn\"\n"
+"mkdir -p \"$LOGS_DIR\"\n"
+"LOGFILE=\"${LOGS_DIR}/$(date -Is)-$(git rev-parse master).log\"\n"
+"exec &> >(tee -a \"${LOGFILE}\")\n"
+"\n"
+"unset GIT_DIR\n"
+"CLONE=\"$(mktemp -d)\"\n"
+"git clone . \"$CLONE\"\n"
+"pushd \"$CLONE\"\n"
+"\n"
+"finish() {\n"
+"  printf \"\\n\\n>>> exit status was %s\\n\" \"$?\"\n"
+"}\n"
+"trap finish EXIT\n"
+"\n"
+"nix-build -A test\n"
+msgstr ""
+
+msgid ""
+"We initially (lines #5 to #8) create a log file, named after *when* the run "
+"is running and for *which* commit it is running for. The `exec` and `tee` "
+"combo allows the output of the script to go both to `stdout` *and* the log "
+"file. This makes the logs output show up when you do a `git push`."
+msgstr ""
+
+msgid ""
+"Lines #10 to #13 create a fresh clone of the repository and line #20 runs "
+"the test command."
+msgstr ""
+
+msgid ""
+"After using a similar post-receive hook for a while, I now even generate a "
+"simple HTML file to make the [logs available](https://ci.euandreh.xyz/) "
+"through the browser."
+msgstr ""
+
+msgid "Upsides"
+msgstr ""
+
+msgid "No vendor lock-in, as all you need is a server with Nix installed."
+msgstr ""
+
+msgid ""
+"And if you pin the Nixpkgs version you're using, this very simple setup "
+"yields extremely sandboxed runs on a very hermetic environment."
+msgstr ""
+
+msgid "Downsides"
+msgstr ""
+
+msgid ""
+"Besides the many missing shiny features of this very simplistic CI, `nix-"
+"build` can be very resource intensive. Specifically, it consumes too much "
+"memory. So if it has to download too many things, or the build closure gets "
+"too big, the server might very well run out of memory."
+msgstr ""