From b0320ce058b0dfba056398b15d3803da755f5d7c Mon Sep 17 00:00:00 2001
From: David Kubecka <davidkubecka@seznam.cz>
Date: Sat, 28 Mar 2015 12:53:20 +0100
Subject: [PATCH] Basic test for erlc (re)compiling and erlcinfo

---
 inttest/erlc_dep_graph/erlc_dep_graph_rt.erl | 86 ++++++++++++++++++++
 inttest/erlc_dep_graph/src/foo.app.src       |  7 ++
 inttest/erlc_dep_graph/src/lisp.erl          |  8 ++
 3 files changed, 101 insertions(+)
 create mode 100644 inttest/erlc_dep_graph/erlc_dep_graph_rt.erl
 create mode 100644 inttest/erlc_dep_graph/src/foo.app.src
 create mode 100644 inttest/erlc_dep_graph/src/lisp.erl

diff --git a/inttest/erlc_dep_graph/erlc_dep_graph_rt.erl b/inttest/erlc_dep_graph/erlc_dep_graph_rt.erl
new file mode 100644
index 0000000..d5f92cf
--- /dev/null
+++ b/inttest/erlc_dep_graph/erlc_dep_graph_rt.erl
@@ -0,0 +1,86 @@
+%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+%% -------------------------------------------------------------------
+%%
+%% rebar: Erlang Build Tools
+%%
+%% Copyright (c) 2015 David Kubecka
+%%
+%% Permission is hereby granted, free of charge, to any person obtaining a copy
+%% of this software and associated documentation files (the "Software"), to deal
+%% in the Software without restriction, including without limitation the rights
+%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+%% copies of the Software, and to permit persons to whom the Software is
+%% furnished to do so, subject to the following conditions:
+%%
+%% The above copyright notice and this permission notice shall be included in
+%% all copies or substantial portions of the Software.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+%% THE SOFTWARE.
+%% -------------------------------------------------------------------
+-module(erlc_dep_graph_rt).
+-export([files/0,
+         run/1]).
+
+-include_lib("eunit/include/eunit.hrl").
+
+files() ->
+    [{copy, "../../rebar", "rebar"},
+     {copy, "src", "src"}].
+
+run(_Dir) ->
+    compile_all(ok, ""),
+    check_beams_ok(),
+    check_beams_untouched(),
+    modify_and_recompile_ok(),
+    ok.
+
+check_beams_ok() ->
+    F = fun(BeamFile) -> ?assert(filelib:is_regular(BeamFile)) end,
+    with_erl_beams(F).
+
+check_beams_untouched() ->
+    Beams = filelib:wildcard("ebin/*.beam"),
+    compile_all_and_assert_mtimes(Beams, fun erlang:'=:='/2).
+
+modify_and_recompile_ok() ->
+    touch(["src/lisp.erl"]),
+    compile_all_and_assert_mtimes(["ebin/lisp.beam"], fun erlang:'<'/2).
+
+compile_all_and_assert_mtimes(Beams, Cmp) ->
+    BeamsModifiedBefore = mtime_ns(Beams),
+    compile_all(ok, ""),
+    BeamsModifiedAfter = mtime_ns(Beams),
+    lists:zipwith(fun(Before, After) -> ?assert(Cmp(Before, After)) end,
+                  BeamsModifiedBefore, BeamsModifiedAfter).
+
+with_erl_beams(F) ->
+    lists:map(
+        fun(ErlFile) ->
+            ErlRoot = filename:rootname(filename:basename(ErlFile)),
+            BeamFile = filename:join("ebin", ErlRoot ++ ".beam"),
+            F(BeamFile)
+        end,
+        filelib:wildcard("src/*.erl")).
+
+mtime_ns(Files) ->
+    [os:cmd("stat -c%y " ++ File) || File <- Files].
+
+touch(Files) ->
+    %% Sleep one second so that filelib:last_modified/1 is guaranteed to notice
+    %% that files have changed.
+    ok = timer:sleep(1000),
+    [os:cmd("touch " ++ File) || File <- Files].
+
+compile_all(Result, Opts) ->
+    ?assertMatch({Result, _},
+        retest_sh:run("./rebar " ++ Opts ++ " compile", [])).
+
+clean_all_ok() ->
+    ?assertMatch({ok, _}, retest_sh:run("./rebar clean", [])).
diff --git a/inttest/erlc_dep_graph/src/foo.app.src b/inttest/erlc_dep_graph/src/foo.app.src
new file mode 100644
index 0000000..307b1bc
--- /dev/null
+++ b/inttest/erlc_dep_graph/src/foo.app.src
@@ -0,0 +1,7 @@
+{application,foo,
+             [{description,[]},
+              {vsn,"1.0.0"},
+              {registered,[]},
+              {applications,[kernel,stdlib]},
+              {env,[]}
+              ]}.
\ No newline at end of file
diff --git a/inttest/erlc_dep_graph/src/lisp.erl b/inttest/erlc_dep_graph/src/lisp.erl
new file mode 100644
index 0000000..dd418d2
--- /dev/null
+++ b/inttest/erlc_dep_graph/src/lisp.erl
@@ -0,0 +1,8 @@
+%% -*- mode: erlang;erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 ft=erlang et
+-module(lisp).
+
+-export([parse_transform/2]).
+
+parse_transform(Forms, _Options) ->
+    Forms.