Allow profile tasks to run without a project

Author: José Valim

lib/mix/lib/mix/tasks/profile.cprof.ex

@@ -99,7 +99,8 @@ defmodule Mix.Tasks.Profile.Cprof do
     {opts, head} = OptionParser.parse_head!(args,
       aliases: [r: :require, p: :parallel, e: :eval, c: :config],
       strict: @switches)
-    Mix.Tasks.Run.run(args, opts, head, &profile_code(&1, opts),
+    Mix.Tasks.Run.run(["--no-mixexs" | args], opts, head,
+                      &profile_code(&1, opts),
                       &profile_code(File.read!(&1), opts))
   end
 

lib/mix/lib/mix/tasks/profile.fprof.ex

@@ -116,7 +116,8 @@ defmodule Mix.Tasks.Profile.Fprof do
     {opts, head} = OptionParser.parse_head!(args,
       aliases: [r: :require, p: :parallel, e: :eval, c: :config],
       strict: @switches)
-    Mix.Tasks.Run.run(args, opts, head, &profile_code(&1, opts),
+    Mix.Tasks.Run.run(["--no-mixexs" | args], opts, head,
+                      &profile_code(&1, opts),
                       &profile_code(File.read!(&1), opts))
   end
 

lib/mix/lib/mix/tasks/run.ex

@@ -38,6 +38,7 @@ defmodule Mix.Tasks.Run do
     * `--no-deps-check` - does not check dependencies
     * `--no-archives-check` - does not check archives
     * `--no-halt` - does not halt the system after running the command
+    * `--no-mixexs` - allows the command to run even if there is no mix.exs
     * `--no-start` - does not start applications after compilation
     * `--no-elixir-version-check` - does not check the Elixir version from mix.exs
 
@@ -47,7 +48,7 @@ defmodule Mix.Tasks.Run do
   def run(args) do
     {opts, head} = OptionParser.parse_head!(args,
       aliases: [r: :require, p: :parallel, e: :eval, c: :config],
-      strict: [parallel: :boolean, require: :keep, eval: :keep, config: :keep,
+      strict: [parallel: :boolean, require: :keep, eval: :keep, config: :keep, mixexs: :boolean,
                halt: :boolean, compile: :boolean, deps_check: :boolean, start: :boolean,
                archives_check: :boolean, elixir_version_check: :boolean, parallel_require: :keep])
 
@@ -83,7 +84,14 @@ defmodule Mix.Tasks.Run do
 
     # Start app after rewriting System.argv,
     # but before requiring and evaling.
-    Mix.Task.run "app.start", args
+    cond do
+      Mix.Project.get ->
+        Mix.Task.run "app.start", args
+      "--no-mixexs" in args ->
+        :ok
+      true ->
+        Mix.Project.get!
+    end
 
     process_load(opts, expr_evaluator)
 

lib/mix/test/mix/tasks/profile.cprof_test.exs

@@ -10,10 +10,6 @@ defmodule Mix.Tasks.Profile.CprofTest do
   @moduletag apps: [:sample]
   @expr "Enum.each(1..5, &String.Chars.Integer.to_string/1)"
 
-  setup do
-    Mix.Project.push MixTest.Case.Sample
-  end
-
   test "profiles evaluated expression", context do
     in_tmp context.test, fn ->
       assert capture_io(fn ->

lib/mix/test/mix/tasks/profile.fprof_test.exs

@@ -6,13 +6,8 @@ defmodule Mix.Tasks.Profile.FprofTest do
   import ExUnit.CaptureIO
 
   alias Mix.Tasks.Profile.Fprof
-
   @moduletag apps: [:sample]
 
-  setup do
-    Mix.Project.push MixTest.Case.Sample
-  end
-
   test "profiles evaluated expression", context do
     in_tmp context.test, fn ->
       assert capture_io(fn ->