Add list option

Author: Oren Cohen

tools/psa/README.md

@@ -34,13 +34,14 @@ Each implementation requires a set of autogenerated files describing the secure
 `release.py` is the script assigned with compiling the secure images:
 
 ```
-usage: release.py [-h] [-m MCU] [-d] [-q] [--commit] [--skip-tests]
+usage: release.py [-h] [-m MCU] [-d] [-q] [-l] [--commit] [--skip-tests]
 
 optional arguments:
   -h, --help         show this help message and exit
   -m MCU, --mcu MCU  build for the given MCU
   -d, --debug        set build profile to debug
   -q, --quiet        No Build log will be printed
+  -l, --list         Print supported PSA secure targets
   --commit           create a git commit for each platform
   --skip-tests       skip the test build phase
 ```

tools/psa/release.py

@@ -292,11 +292,16 @@ def get_parser():
                         default=False,
                         help="No Build log will be printed")
 
+    parser.add_argument('-l', '--list',
+                        action="store_true",
+                        default=False,
+                        help="Print supported PSA secure targets")
+
     parser.add_argument("--commit",
                         help="create a git commit for each platform",
                         action="store_true",
                         default=False)
-    
+
     parser.add_argument('--skip-tests',
                         action="store_true",
                         default=False,
@@ -328,6 +333,11 @@ def main():
         subprocess_output = FNULL
         subprocess_err = subprocess.STDOUT
 
+    if options.list:
+        logger.info("Avialable platforms are: {}".format(
+            ', '.join([t for t in _get_psa_secure_targets_list()])))
+        return
+
     prep_build_dir()
     psa_platforms_list = get_mbed_official_psa_release(options.mcu)
     logger.info("Building the following platforms: {}".format(