Use docker for _some_ testing?

[Duy Nguyen <pclouds@gmail.com>]

The story started with my problem on Debian, which I didn't have and
didn't want to install a Debian VM just for that problem. So I made a
docker image with the following script.

Which makes me think, could we use something like this to make sure
people (on Linux) can test more obscure cases? Sometimes there are
featues that require some dependencies that are not always present on
the developer's machine (http server is a big one, locales come close
second, then there will be lmdb and watchman in future...). With this,
said developer can do a final test run in docker covering as much as
possible.

Of course it can't cover everything. Different compiler versions are
out. OS-specific changes are out (but wine would be still good to test
some aspect of Windows port, or at least make sure it builds)

Comments?

-- 8< --
diff --git a/contrib/docker/locale.gen b/contrib/docker/locale.gen
new file mode 100644
index 0000000..ef08e00
--- /dev/null
+++ b/contrib/docker/locale.gen
@@ -0,0 +1,2 @@
+is_IS.UTF-8 UTF-8
+is_IS ISO-8859-1
\ No newline at end of file
diff --git a/contrib/docker/run.sh b/contrib/docker/run.sh
new file mode 100755
index 0000000..83e5679
--- /dev/null
+++ b/contrib/docker/run.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+
+die() {
+	echo "$@" >&2
+	exit 1
+}
+
+build_debian() {
+	cat >Dockerfile <<-EOF
+	FROM debian:latest
+	RUN apt-get update && \
+		apt-get install -y libcurl4-gnutls-dev libexpat1-dev \
+		gettext libz-dev libssl-dev build-essential
+	RUN apt-get install -y locales
+	COPY locale.gen /etc/locale.gen
+	RUN locale-gen
+	RUN groupadd -r $(id -gn) -g $(id -g) && \
+		useradd -u $(id -u) -r -d "$HOME" -g $(id -g) -s /sbin/nologin $(id -un)
+	USER $(id -un)
+	EOF
+	docker build -t $IMAGE .  || die "failed to build docker image"
+}
+
+DISTRO=debian
+IMAGE=git-$DISTRO-$(id -un)
+ROOT="$(realpath $(git rev-parse --show-cdup))"
+
+test "$(docker images --format='{{.Repository}}' $IMAGE)" = $IMAGE || \
+	build_$DISTRO
+docker run -it --rm -v "$ROOT":"$ROOT" -w "$(pwd)" $IMAGE bash
-- 8< --
--
Duy