docker_image: add custom docker_image macro building and pushing docker images
diff --git a/bazel_tools/docker.bzl b/bazel_tools/docker.bzl
new file mode 100644
index 0000000..1149497
--- /dev/null
+++ b/bazel_tools/docker.bzl
@@ -0,0 +1,55 @@
+__PUSH_TO_DEV_TMPL = """
+#!/bin/sh
+set -eE -o functrace
+# --- begin runfiles.bash initialization ---
+# Copy-pasted from Bazel's Bash runfiles library (tools/bash/runfiles/runfiles.bash).
+set -euo pipefail
+if [[ ! -d "\$${{RUNFILES_DIR:-/dev/null}}" && ! -f "\$${{RUNFILES_MANIFEST_FILE:-/dev/null}}" ]]; then
+ if [[ -f "\$$0.runfiles_manifest" ]]; then
+ export RUNFILES_MANIFEST_FILE="\$$0.runfiles_manifest"
+ elif [[ -f "\$$0.runfiles/MANIFEST" ]]; then
+ export RUNFILES_MANIFEST_FILE="\$$0.runfiles/MANIFEST"
+ elif [[ -f "\$$0.runfiles/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
+ export RUNFILES_DIR="\$$0.runfiles"
+ fi
+fi
+if [[ -f "\$${{RUNFILES_DIR:-/dev/null}}/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
+ source "\$${{RUNFILES_DIR}}/bazel_tools/tools/bash/runfiles/runfiles.bash"
+elif [[ -f "\$${{RUNFILES_MANIFEST_FILE:-/dev/null}}" ]]; then
+ source "\$$(grep -m1 "^bazel_tools/tools/bash/runfiles/runfiles.bash " \
+ "\$$RUNFILES_MANIFEST_FILE" | cut -d ' ' -f 2-)"
+else
+ echo >&2 "ERROR: cannot find @bazel_tools//tools/bash/runfiles:runfiles.bash"
+ exit 1
+fi
+# --- end runfiles.bash initialization ---
+IMAGE="{registry}/{image}:{tag}"
+DOCKERFILE=\$$(rlocation __main__/{package}/{dockerfile})
+docker build \
+ --tag=\$$IMAGE \
+ --file=\$$DOCKERFILE \
+ \$$(dirname "\$$DOCKERFILE")
+docker push \$$IMAGE
+"""
+
+
+def docker_image(name, registry, image, tag, dockerfile, srcs, **kwargs):
+ native.genrule(
+ name = "%s.sh" % name,
+ executable = False,
+ outs = ["build_and_push.sh",],
+ cmd = """cat > $@ <<EOM
+%s
+EOM
+""" % __PUSH_TO_DEV_TMPL.format(
+ registry = registry,
+ image = image,
+ tag = tag,
+ dockerfile = dockerfile,
+ package = native.package_name(),
+ ))
+ native.sh_binary(
+ name = name,
+ srcs = ["build_and_push.sh",],
+ data = srcs + [dockerfile,],
+ deps = ["@bazel_tools//tools/bash/runfiles",])