Roll recipe dependencies (nontrivial).

scripts/slave/recipes/infra/recipe_autoroller_public.expected/basic.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "config",
       "--spec",
       "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': True, 'name': 'infra', 'url': 'https://chromium.googlesource.com/infra/infra.git'}]"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient setup"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "sync",
       "--verbose",
       "--with_branch_heads",
       "--nohooks",
       "-j8",
       "--reset",
       "--force",
       "--upstream",
       "--no-nag-max",
       "--delete_unversioned_trees",
       "--revision",
       "infra@origin/master",
       "--revision",
       "infra/recipes-py@origin/master",
       "--output-json",
       "/path/to/tmp/json"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient sync",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"solutions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"infra/\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"revision\": \"5e03a58dc0850e5137a8ebbce29610670c756aed\"@@@",
       "@@@STEP_LOG_LINE@json.output@    }, @@@",
@@ skipping 10 matching lines @@
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "recurse",
       "git",
       "config",
       "user.name",
       "local_bot"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient recurse (git config user.name)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "recurse",
       "git",
       "config",
       "user.email",
       "local_bot@example.com"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient recurse (git config user.email)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/tools/pycurl.py",
       "https://luci-config.appspot.com/_ah/api/config/v1/projects",
       "--outfile",
       "/path/to/tmp/"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "Get luci-config projects"
   },
   {
     "cmd": [],
-    "cwd": "[SLAVE_BUILD]",
     "name": "build"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
       "--path",
       "[TMP_BASE]/roll_build_tmp_1",
       "--url",
       "https://repo.repo/build"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "build.git setup",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@"
     ]
   },
   {
     "cmd": [
       "git",
       "retry",
       "fetch",
@@ skipping 92 matching lines @@
     "cmd": [
       "[SLAVE_BUILD]/infra/ENV/bin/python",
       "-u",
       "[SLAVE_BUILD]/infra/recipes-py/recipes.py",
       "--package",
       "[TMP_BASE]/roll_build_tmp_1/infra/config/recipes.cfg",
       "autoroll",
       "--output-json",
       "/path/to/tmp/json"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "build.roll",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_TEXT@ (trivial)@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"picked_roll_details\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"commit_infos\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"recipe_engine\": [@@@",
       "@@@STEP_LOG_LINE@json.output@        {@@@",
       "@@@STEP_LOG_LINE@json.output@          \"author\": \"foo@chromium.org\", @@@",
@@ skipping 62 matching lines @@
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
       "[DEPOT_TOOLS]/gsutil.py",
       "----",
       "cat",
       "gs://recipe-roller-cl-uploads/8e9377cb1551d1353f8f1103e01bd5bf"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "build.gsutil cat",
     "stderr": "/path/to/tmp/",
     "stdout": "/path/to/tmp/",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@stderr@Error: No URLs matched ...@@@",
       "@@@STEP_LOG_END@stderr@@@"
     ]
   },
   {
@@ skipping 33 matching lines @@
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
       "[DEPOT_TOOLS]/gsutil.py",
       "----",
       "cp",
       "{\"diff_digest\": \"afe53a0e969fd0b2a6b5c5f89724d0c6\", \"issue\": \"123456789\", \"issue_url\": \"https://codereview.chromium.org/123456789\"}",
       "gs://recipe-roller-cl-uploads/8e9377cb1551d1353f8f1103e01bd5bf"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "build.gsutil upload",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/recipe-roller-cl-uploads/8e9377cb1551d1353f8f1103e01bd5bf@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil, sys\nshutil.rmtree(sys.argv[1])\n",
       "[TMP_BASE]/roll_build_tmp_1"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "build.rmtree [TMP_BASE]/roll_build_tmp_1",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
       "@@@STEP_LOG_LINE@python.inline@import shutil, sys@@@",
       "@@@STEP_LOG_LINE@python.inline@shutil.rmtree(sys.argv[1])@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]