diff options
Diffstat (limited to 'plugins/xref.mk')
| -rw-r--r-- | plugins/xref.mk | 223 |
1 files changed, 201 insertions, 22 deletions
diff --git a/plugins/xref.mk b/plugins/xref.mk index 7da0f37..0ecace2 100644 --- a/plugins/xref.mk +++ b/plugins/xref.mk @@ -1,39 +1,218 @@ -# Copyright (c) 2016, Loïc Hoguin <[email protected]> -# Copyright (c) 2015, Erlang Solutions Ltd. +# Copyright (c) 2022, Loïc Hoguin <[email protected]> # This file is part of erlang.mk and subject to the terms of the ISC License. -.PHONY: xref distclean-xref +.PHONY: xref # Configuration. -ifeq ($(XREF_CONFIG),) - XREFR_ARGS := -else - XREFR_ARGS := -c $(XREF_CONFIG) -endif +# We do not use locals_not_used or deprecated_function_calls +# because the compiler will error out by default in those +# cases with Erlang.mk. Deprecated functions may make sense +# in some cases but few libraries define them. We do not +# use exports_not_used by default because it hinders more +# than it helps library projects such as Cowboy. Finally, +# undefined_functions provides little that undefined_function_calls +# doesn't already provide, so it's not enabled by default. +XREF_CHECKS ?= [undefined_function_calls] + +# Instead of predefined checks a query can be evaluated +# using the Xref DSL. The $q variable is used in that case. + +# The scope is a list of keywords that correspond to +# application directories, being essentially an easy way +# to configure which applications to analyze. With: +# +# - app: . +# - apps: $(ALL_APPS_DIRS) +# - deps: $(ALL_DEPS_DIRS) +# - otp: Built-in Erlang/OTP applications. +# +# The default is conservative (app) and will not be +# appropriate for all types of queries (for example +# application_call requires adding all applications +# that might be called or they will not be found). +XREF_SCOPE ?= app # apps deps otp + +# If the above is not enough, additional application +# directories can be configured. +XREF_EXTRA_APP_DIRS ?= -XREFR ?= $(CURDIR)/xrefr -export XREFR +# As well as additional non-application directories. +XREF_EXTRA_DIRS ?= -XREFR_URL ?= https://github.com/inaka/xref_runner/releases/download/1.1.0/xrefr +# Erlang.mk supports -ignore_xref([...]) with forms +# {M, F, A} | {F, A} | M, the latter ignoring whole +# modules. Ignores can also be provided project-wide. +XREF_IGNORE ?= [] + +# All callbacks may be ignored. Erlang.mk will ignore +# them automatically for exports_not_used (unless it +# is explicitly disabled by the user). +XREF_IGNORE_CALLBACKS ?= # Core targets. help:: $(verbose) printf '%s\n' '' \ 'Xref targets:' \ - ' xref Run Xrefr using $$XREF_CONFIG as config file if defined' - -distclean:: distclean-xref + ' xref Analyze the project using Xref' \ + ' xref q=QUERY Evaluate an Xref query' # Plugin-specific targets. -$(XREFR): - $(gen_verbose) $(call core_http_get,$(XREFR),$(XREFR_URL)) - $(verbose) chmod +x $(XREFR) - -xref: deps app $(XREFR) - $(gen_verbose) $(XREFR) $(XREFR_ARGS) +define xref.erl + {ok, Xref} = xref:start([]), + Scope = [$(call comma_list,$(XREF_SCOPE))], + AppDirs0 = [$(call comma_list,$(foreach d,$(XREF_EXTRA_APP_DIRS),"$d"))], + AppDirs1 = case lists:member(otp, Scope) of + false -> AppDirs0; + true -> + RootDir = code:root_dir(), + AppDirs0 ++ [filename:dirname(P) || P <- code:get_path(), lists:prefix(RootDir, P)] + end, + AppDirs2 = case lists:member(deps, Scope) of + false -> AppDirs1; + true -> [$(call comma_list,$(foreach d,$(ALL_DEPS_DIRS),"$d"))] ++ AppDirs1 + end, + AppDirs3 = case lists:member(apps, Scope) of + false -> AppDirs2; + true -> [$(call comma_list,$(foreach d,$(ALL_APPS_DIRS),"$d"))] ++ AppDirs2 + end, + AppDirs = case lists:member(app, Scope) of + false -> AppDirs3; + true -> ["../$(notdir $(CURDIR))"|AppDirs3] + end, + [{ok, _} = xref:add_application(Xref, AppDir, [{builtins, true}]) || AppDir <- AppDirs], + ExtraDirs = [$(call comma_list,$(foreach d,$(XREF_EXTRA_DIRS),"$d"))], + [{ok, _} = xref:add_directory(Xref, ExtraDir, [{builtins, true}]) || ExtraDir <- ExtraDirs], + ok = xref:set_library_path(Xref, code:get_path() -- (["ebin", "."] ++ AppDirs ++ ExtraDirs)), + Checks = case {$1, is_list($2)} of + {check, true} -> $2; + {check, false} -> [$2]; + {query, _} -> [$2] + end, + FinalRes = [begin + IsInformational = case $1 of + query -> true; + check -> + is_tuple(Check) andalso + lists:member(element(1, Check), + [call, use, module_call, module_use, application_call, application_use]) + end, + {ok, Res0} = case $1 of + check -> xref:analyze(Xref, Check); + query -> xref:q(Xref, Check) + end, + Res = case IsInformational of + true -> Res0; + false -> + lists:filter(fun(R) -> + {Mod, InMFA, MFA} = case R of + {InMFA0 = {M, _, _}, MFA0} -> {M, InMFA0, MFA0}; + {M, _, _} -> {M, R, R} + end, + Attrs = try + Mod:module_info(attributes) + catch error:undef -> + [] + end, + InlineIgnores = lists:flatten([ + [case V of + M when is_atom(M) -> {M, '_', '_'}; + {F, A} -> {Mod, F, A}; + _ -> V + end || V <- Values] + || {ignore_xref, Values} <- Attrs]), + BuiltinIgnores = [ + {eunit_test, wrapper_test_exported_, 0} + ], + DoCallbackIgnores = case {Check, "$(strip $(XREF_IGNORE_CALLBACKS))"} of + {exports_not_used, ""} -> true; + {_, "0"} -> false; + _ -> true + end, + CallbackIgnores = case DoCallbackIgnores of + false -> []; + true -> + Behaviors = lists:flatten([ + [BL || {behavior, BL} <- Attrs], + [BL || {behaviour, BL} <- Attrs] + ]), + [{Mod, CF, CA} || B <- Behaviors, {CF, CA} <- B:behaviour_info(callbacks)] + end, + WideIgnores = if + is_list($(XREF_IGNORE)) -> + [if is_atom(I) -> {I, '_', '_'}; true -> I end + || I <- $(XREF_IGNORE)]; + true -> [$(XREF_IGNORE)] + end, + Ignores = InlineIgnores ++ BuiltinIgnores ++ CallbackIgnores ++ WideIgnores, + not (lists:member(InMFA, Ignores) + orelse lists:member(MFA, Ignores) + orelse lists:member({Mod, '_', '_'}, Ignores)) + end, Res0) + end, + case Res of + [] -> ok; + _ when IsInformational -> + case Check of + {call, {CM, CF, CA}} -> + io:format("Functions that ~s:~s/~b calls:~n", [CM, CF, CA]); + {use, {CM, CF, CA}} -> + io:format("Function ~s:~s/~b is called by:~n", [CM, CF, CA]); + {module_call, CMod} -> + io:format("Modules that ~s calls:~n", [CMod]); + {module_use, CMod} -> + io:format("Module ~s is used by:~n", [CMod]); + {application_call, CApp} -> + io:format("Applications that ~s calls:~n", [CApp]); + {application_use, CApp} -> + io:format("Application ~s is used by:~n", [CApp]); + _ when $1 =:= query -> + io:format("Query ~s returned:~n", [Check]) + end, + [case R of + {{InM, InF, InA}, {M, F, A}} -> + io:format("- ~s:~s/~b called by ~s:~s/~b~n", + [M, F, A, InM, InF, InA]); + {M, F, A} -> + io:format("- ~s:~s/~b~n", [M, F, A]); + ModOrApp -> + io:format("- ~s~n", [ModOrApp]) + end || R <- Res], + ok; + _ -> + [case {Check, R} of + {undefined_function_calls, {{InM, InF, InA}, {M, F, A}}} -> + io:format("Undefined function ~s:~s/~b called by ~s:~s/~b~n", + [M, F, A, InM, InF, InA]); + {undefined_functions, {M, F, A}} -> + io:format("Undefined function ~s:~s/~b~n", [M, F, A]); + {locals_not_used, {M, F, A}} -> + io:format("Unused local function ~s:~s/~b~n", [M, F, A]); + {exports_not_used, {M, F, A}} -> + io:format("Unused exported function ~s:~s/~b~n", [M, F, A]); + {deprecated_function_calls, {{InM, InF, InA}, {M, F, A}}} -> + io:format("Deprecated function ~s:~s/~b called by ~s:~s/~b~n", + [M, F, A, InM, InF, InA]); + {deprecated_functions, {M, F, A}} -> + io:format("Deprecated function ~s:~s/~b~n", [M, F, A]); + _ -> + io:format("~p: ~p~n", [Check, R]) + end || R <- Res], + error + end + end || Check <- Checks], + stopped = xref:stop(Xref), + case lists:usort(FinalRes) of + [ok] -> halt(0); + _ -> halt(1) + end +endef -distclean-xref: - $(gen_verbose) rm -rf $(XREFR) +xref: deps app +ifdef q + $(verbose) $(call erlang,$(call xref.erl,query,"$q"),-pa ebin/) +else + $(verbose) $(call erlang,$(call xref.erl,check,$(XREF_CHECKS)),-pa ebin/) +endif |