Improve formatting job output

To make it more clear where there are formatting errors, have format.py
print what commands the user needs to run to fix the formatting errors in
their PR.

1 files changed, 12 insertions, 2 deletions

diff --git a/tests/scripts/format.py b/tests/scripts/format.py
index 71f46e304a..b1957f34d8 100644
--- a/tests/scripts/format.py
+++ b/tests/scripts/format.py
@@ -186,14 +186,20 @@ def main(argv):
         jitformat = os.path.join(jitformat, "jit-format")
     elif platform == 'Windows_NT':
         jitformat = os.path.join(jitformat,"jit-format.cmd")
+    errorMessage = ""
 
-    for build in ["Checked", "Debug", "Release"]:
-        for project in ["dll", "standalone", "crossgen"]:
+    builds = ["Checked", "Debug", "Release"]
+    projects = ["dll", "standalone", "crossgen"]
+
+    for build in builds:
+        for project in projects:
             proc = subprocess.Popen([jitformat, "-a", arch, "-b", build, "-o", platform, "-c", coreclr, "--verbose", "--projects", project], env=my_env)
             output,error = proc.communicate()
             errorcode = proc.returncode
 
             if errorcode != 0:
+                errorMessage += "\tjit-format -a " + arch + " -b " + build + " -o " + platform
+                errorMessage += " -c <absolute-path-to-coreclr> --verbose --fix --projects " + project +"\n"
                 returncode = errorcode
 
     os.chdir(current_dir)
@@ -210,6 +216,10 @@ def main(argv):
         print("Deleting " + bootstrapPath)
         os.remove(bootstrapPath)
 
+    if returncode != 0:
+        print("There were errors in formatting. Please run jit-format locally with: \n")
+        print(errorMessage)
+
     return returncode
 
 if __name__ == '__main__':