real bootstrapping

4 files changed, 129 insertions, 68 deletions

diff --git a/bootstrap b/bootstrap
new file mode 100755
index 0000000..7409cbe
--- /dev/null
+++ b/bootstrap
@@ -0,0 +1,129 @@
+#!/usr/bin/env escript
+%% -*- mode: erlang;erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ft=erlang ts=4 sw=4 et
+
+main(_Args) ->
+    %% Fetch and build deps required to build rebar3
+    BaseDeps = [{providers, []}
+               ,{getopt, []}
+               ,{erlware_commons, ["ec_dictionary.erl", "ec_vsn.erl"]}],
+    Deps = get_deps(),
+    [fetch_and_compile(Dep, Deps) || Dep <- BaseDeps],
+
+    %% Build rebar3 modules with compile:file
+    bootstrap_rebar3(),
+
+    %% Build rebar.app from rebar.app.src
+    {ok, App} = rebar_app_info:new(rebar, "3.0.0", filename:absname("_build/default/lib/rebar/")),
+    rebar_otp_app:compile(rebar_state:new(), App),
+
+    %% Because we are compiling files that are loaded already we want to silence
+    %% not_purged errors in rebar_erlc_compiler:opts_changed/1
+    error_logger:tty(false),
+
+    setup_env(),
+    os:putenv("REBAR_PROFILE", "bootstrap"),
+    {ok, State} = rebar3:run(["compile"]),
+    reset_env(),
+    os:unsetenv("REBAR_PROFILE"),
+    %% Build erlydtl files (a hook on compile in the default profile) and escript file
+    DepsPaths = rebar_state:code_paths(State, all_deps),
+    code:add_pathsa(DepsPaths),
+
+    rebar3:run(["clean", "-a"]),
+    rebar3:run(["escriptize"]),
+
+    %% Done with compile, can turn back on error logger
+    error_logger:tty(true),
+
+    %% Finally, update executable perms for our script on *nix,
+    %%  or write out script files on win32.
+    ec_file:copy("_build/default/bin/rebar3", "./rebar3"),
+    case os:type() of
+        {unix,_} ->
+            [] = os:cmd("chmod u+x rebar3"),
+            ok;
+        {win32,_} ->
+            write_windows_scripts(),
+            ok;
+        _ ->
+            ok
+    end.
+
+fetch_and_compile({Name, ErlFirstFiles}, Deps) ->
+    {Name, _, Repo} = lists:keyfind(Name, 1, Deps),
+    ok = fetch(Repo, Name),
+    compile(Name, ErlFirstFiles).
+
+fetch({git, Url, Source}, App) ->
+    Dir = filename:join([filename:absname("_build/default/lib/"), App]),
+    case filelib:is_dir(Dir) of
+        true ->
+            true = code:add_path(filename:join(Dir, "ebin")),
+            ok;
+        false ->
+            fetch_source(Dir, Url, Source),
+            ok
+    end.
+
+fetch_source(Dir, Url, {ref, Ref}) ->
+    ok = filelib:ensure_dir(Dir),
+    os:cmd(io_lib:format("git clone ~s ~s", [Url, Dir])),
+    {ok, Cwd} = file:get_cwd(),
+    file:set_cwd(Dir),
+    os:cmd(io_lib:format("git checkout -q ~s", [Ref])),
+    file:set_cwd(Cwd);
+fetch_source(Dir, Url, {_, Branch}) ->
+    ok = filelib:ensure_dir(Dir),
+    os:cmd(io_lib:format("git clone ~s ~s -b ~s --single-branch",
+                         [Url, Dir, Branch])).
+
+compile(App, FirstFiles) ->
+    Dir = filename:join(filename:absname("_build/default/lib/"), App),
+    filelib:ensure_dir(filename:join([Dir, "ebin", "dummy.beam"])),
+    code:add_path(filename:join(Dir, "ebin")),
+    FirstFilesPaths = [filename:join([Dir, "src", Module]) || Module <- FirstFiles],
+    Sources = FirstFilesPaths ++ filelib:wildcard(filename:join([Dir, "src", "*.erl"])),
+    [compile:file(X, [{i, filename:join(Dir, "include")}
+                     ,{outdir,  filename:join(Dir, "ebin")}
+                     ,return]) || X <- Sources].
+
+bootstrap_rebar3() ->
+    filelib:ensure_dir("_build/default/lib/rebar/ebin/dummy.beam"),
+    filelib:ensure_dir("_build/default/lib/rebar/src/dummy.erl"),
+    ec_file:copy("src", "_build/default/lib/rebar/src", [recursive]),
+    Sources = filelib:wildcard("src/*.erl"),
+    [compile:file(X, [{outdir, "_build/default/lib/rebar/ebin/"}]) || X <- Sources],
+    code:add_path(filename:absname("_build/default/lib/rebar/ebin")).
+
+setup_env() ->
+    %% We don't need or want erlydtl or relx providers loaded yet
+    application:load(rebar),
+    {ok, Providers} = application:get_env(rebar, providers),
+    Providers1 = Providers -- [rebar_prv_erlydtl_compiler,
+                               rebar_prv_release,
+                               rebar_prv_tar],
+    application:set_env(rebar, providers, Providers1).
+
+reset_env() ->
+    %% Reset the env so we get all providers and can build erlydtl files
+    application:unset_env(rebar, providers),
+    application:unload(rebar),
+    application:load(rebar).
+
+write_windows_scripts() ->
+    CmdScript=
+        "@echo off\r\n"
+        "setlocal\r\n"
+        "set rebarscript=%~f0\r\n"
+        "escript.exe \"%rebarscript:.cmd=%\" %*\r\n",
+    ok = file:write_file("rebar3.cmd", CmdScript).
+
+get_deps() ->
+    case file:consult("rebar.lock") of
+        {ok, [Deps]} ->
+            [{binary_to_atom(Name, utf8), "", Source} || {Name, Source, _Level} <- Deps];
+        _ ->
+            {ok, Config} = file:consult("rebar.config"),
+            proplists:get_value(deps, Config)
+    end.
diff --git a/bootstrap/bootstrap b/bootstrap/bootstrap
deleted file mode 100755
index 4e3d304..0000000
--- a/bootstrap/bootstrap
+++ /dev/null
@@ -1,66 +0,0 @@
-#!/usr/bin/env escript
-%% -*- mode: erlang;erlang-indent-level: 4;indent-tabs-mode: nil -*-
-%% ex: ft=erlang ts=4 sw=4 et
-
-main(Args) ->
-    case lists:member("--help", Args) of
-        true ->
-            usage(),
-            halt(0);
-        false ->
-            ok
-    end,
-
-    %% Check for force=1 flag to force a rebuild
-    case lists:member("force=1", Args) of
-        true ->
-            rm("ebin/*.beam");
-        false ->
-            rm("ebin/rebar.beam")
-    end,
-
-    %% Extract the system info of the version of OTP we use to compile rebar
-
-    os:cmd("./bootstrap/rebar get-deps compile escriptize"),
-
-    %% Finally, update executable perms for our script on *nix,
-    %%  or write out script files on win32.
-    case os:type() of
-        {unix,_} ->
-            [] = os:cmd("chmod u+x rebar3"),
-            ok;
-        {win32,_} ->
-            write_windows_scripts(),
-            ok;
-        _ ->
-            ok
-    end,
-
-    %% Add a helpful message
-    io:format("Congratulations! You now have a self-contained script called"
-              " \"rebar3\" in\n"
-              "your current working directory. "
-              "Place this script anywhere in your path\n"
-              "and you can use rebar to build OTP-compliant apps.\n").
-
-usage() ->
-  io:format("Usage: bootstrap [OPTION]...~n"),
-  io:format("    force=1   unconditional build~n"),
-  io:format("    debug     add debug information~n").
-
-rm(Path) ->
-    NativePath = filename:nativename(Path),
-    Cmd = case os:type() of
-              {unix,_} -> "rm -f ";
-              {win32,_} -> "del /q "
-          end,
-    [] = os:cmd(Cmd ++ NativePath),
-    ok.
-
-write_windows_scripts() ->
-    CmdScript=
-        "@echo off\r\n"
-        "setlocal\r\n"
-        "set rebarscript=%~f0\r\n"
-        "escript.exe \"%rebarscript:.cmd=%\" %*\r\n",
-    ok = file:write_file("rebar.cmd", CmdScript).
diff --git a/bootstrap/bootstrap.bat b/bootstrap/bootstrap.bat
deleted file mode 100644
index b646a7d..0000000
--- a/bootstrap/bootstrap.bat
+++ /dev/null
@@ -1,2 +0,0 @@
-@echo off
-escript.exe bootstrap %*
diff --git a/bootstrap/rebar b/bootstrap/rebar
deleted file mode 100755
index 14e5c22..0000000
--- a/bootstrap/rebar
+++ /dev/null