Disable caching via mbed config cache off or mbed config cache none than a separate variable

Author: screamerbg

README.md

@@ -781,8 +781,7 @@ Here is a list of currently implemented configuration settings:
  * `ARM_PATH`, `GCC_ARM_PATH`, `IAR_PATH` - defines the default path to ARM Compiler, GCC ARM and IAR Workbench toolchains. Default: none.
  * `protocol` - defines the default protocol used for importing or cloning of programs and libraries. The possible values are `https`, `http` and `ssh`. Use `ssh` if you have generated and registered SSH keys (Public Key Authentication) with a service like GitHub, GitLab, Bitbucket, etc. Read more about SSH keys [here](https://help.github.com/articles/generating-an-ssh-key/) Default: `https`.
  * `depth` - defines the *clone* depth for importing or cloning and applies only to *Git* repositories. Note that while this option may improve cloning speed, it may also prevent you from correctly checking out a dependency tree when the reference revision hash is older than the clone depth. Read more about shallow clones [here](https://git-scm.com/docs/git-clone). Default: none.
- * `cache` - defines the local path that will be used to store minimalistic copies of the imported or cloned repositories, and attempts to use them to minimize traffic and speed up future importing. Default: none (system temp path).
- * `cache_disabled` - disables the caching functionality. Default: none.
+ * `cache` - defines the local path that will be used to store minimalistic copies of the imported or cloned repositories, and attempts to use them to minimize traffic and speed up future importing. Will disable caching if set to "off" or "none". Default: system temp path.
 
 ## Troubleshooting
 

mbed/mbed.py

@@ -849,9 +849,10 @@ def fromurl(cls, url, path=None):
         else:
             error('Invalid repository (%s)' % url.strip(), -1)
 
-        g = Global()
-        if cache_repositories and not g.get_cfg('CACHE_DISABLED'):
-            repo.cache = g.get_cfg('CACHE') or os.path.join(tempfile.gettempdir(), 'mbed-repo-cache')
+        cache_cfg = Global().get_cfg('CACHE', '')
+        if cache_repositories and cache_cfg != 'none' and cache_cfg != 'off' and cache_cfg != 'disabled':
+            loc = cache_cfg if (cache_cfg and cache_cfg != 'on' and cache_cfg != 'enabled') else None
+            repo.cache = loc or os.path.join(tempfile.gettempdir(), 'mbed-repo-cache')
 
         return repo
 
@@ -883,9 +884,10 @@ def fromrepo(cls, path=None):
         repo.path = os.path.abspath(path)
         repo.name = os.path.basename(repo.path)
 
-        g = Global()
-        if cache_repositories and not g.get_cfg('CACHE_DISABLED'):
-            repo.cache = g.get_cfg('CACHE') or os.path.join(tempfile.gettempdir(), 'mbed-repo-cache')
+        cache_cfg = Global().get_cfg('CACHE', '')
+        if cache_repositories and cache_cfg != 'none' and cache_cfg != 'off' and cache_cfg != 'disabled':
+            loc = cache_cfg if (cache_cfg and cache_cfg != 'on' and cache_cfg != 'enabled') else None
+            repo.cache = loc or os.path.join(tempfile.gettempdir(), 'mbed-repo-cache')
 
         repo.sync()