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load("@bazel-erlang//:bazel_erlang_lib.bzl", "ErlangLibInfo", "flat_deps", "path_join")
load("@bazel-erlang//:ct.bzl", "additional_file_dest_relative_path")
RabbitmqHomeInfo = provider(
doc = "An assembled RABBITMQ_HOME dir",
fields = {
"rabbitmqctl": "rabbitmqctl script from the sbin directory",
},
)
def _copy_script(ctx, script):
dest = ctx.actions.declare_file(path_join(ctx.label.name, "sbin", script.basename))
args = ctx.actions.args()
args.add_all([script, dest])
ctx.actions.run(
inputs = [script],
outputs = [dest],
executable = "cp",
arguments = [args],
)
return dest
def link_escript(ctx, escript):
e = ctx.attr._rabbitmqctl_escript.files_to_run.executable
s = ctx.actions.declare_file(path_join(ctx.label.name, "escript", escript))
ctx.actions.symlink(
output = s,
target_file = e,
)
return s
def _plugins_dir_links(ctx, plugin):
lib_info = plugin[ErlangLibInfo]
plugin_path = path_join(
ctx.label.name,
"plugins",
lib_info.lib_name,
)
links = []
for f in lib_info.include:
o = ctx.actions.declare_file(path_join(plugin_path, "include", f.basename))
ctx.actions.symlink(
output = o,
target_file = f,
)
links.append(o)
for f in lib_info.beam:
if f.is_directory:
if f.basename != "ebin":
fail("{} contains a directory in 'beam' that is not an ebin dir".format(lib_info.lib_name))
o = ctx.actions.declare_file(path_join(plugin_path, "ebin"))
else:
o = ctx.actions.declare_file(path_join(plugin_path, "ebin", f.basename))
ctx.actions.symlink(
output = o,
target_file = f,
)
links.append(o)
for f in lib_info.priv:
p = additional_file_dest_relative_path(plugin.label, f)
o = ctx.actions.declare_file(path_join(plugin_path, p))
ctx.actions.symlink(
output = o,
target_file = f,
)
links.append(o)
return links
def unique_versions(plugins):
erlang_versions = []
for plugin in plugins:
erlang_version = plugin[ErlangLibInfo].erlang_version
if not erlang_version in erlang_versions:
erlang_versions.append(erlang_version)
return erlang_versions
def flatten(list_of_lists):
return [item for sublist in list_of_lists for item in sublist]
def _impl(ctx):
plugins = flat_deps(ctx.attr.plugins)
erlang_versions = unique_versions(plugins)
if len(erlang_versions) > 1:
fail("plugins do not have a unified erlang version", erlang_versions)
scripts = [_copy_script(ctx, script) for script in ctx.files._scripts]
rabbitmq_ctl_copies = [
"rabbitmq-diagnostics",
"rabbitmq-plugins",
"rabbitmq-queues",
"rabbitmq-streams",
"rabbitmq-upgrade",
"rabbitmqctl",
]
escripts = [link_escript(ctx, escript) for escript in rabbitmq_ctl_copies]
plugins = flatten([_plugins_dir_links(ctx, plugin) for plugin in plugins])
rabbitmqctl = None
for script in scripts:
if script.basename == "rabbitmqctl":
rabbitmqctl = script
if rabbitmqctl == None:
fail("could not find rabbitmqct among", scripts)
return [
RabbitmqHomeInfo(
rabbitmqctl = rabbitmqctl,
),
DefaultInfo(
files = depset(scripts + escripts + plugins),
),
]
RABBITMQ_HOME_ATTRS = {
"_scripts": attr.label_list(
default = [
"//deps/rabbit:scripts/rabbitmq-defaults",
"//deps/rabbit:scripts/rabbitmq-diagnostics",
"//deps/rabbit:scripts/rabbitmq-env",
"//deps/rabbit:scripts/rabbitmq-plugins",
"//deps/rabbit:scripts/rabbitmq-queues",
"//deps/rabbit:scripts/rabbitmq-server",
"//deps/rabbit:scripts/rabbitmqctl",
],
allow_files = True,
),
"_rabbitmqctl_escript": attr.label(default = "//deps/rabbitmq_cli:rabbitmqctl"),
"plugins": attr.label_list(providers = [ErlangLibInfo]),
}
rabbitmq_home = rule(
implementation = _impl,
attrs = RABBITMQ_HOME_ATTRS,
)
def _dirname(p):
return p.rpartition("/")[0]
def rabbitmq_home_short_path(rabbitmq_home):
short_path = rabbitmq_home[RabbitmqHomeInfo].rabbitmqctl.short_path
if rabbitmq_home.label.workspace_root != "":
short_path = path_join(rabbitmq_home.label.workspace_root, short_path)
return _dirname(_dirname(short_path))
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