cerbero: Improve ergonomics for cache download outside of CI

Part-of: <https://gitlab.freedesktop.org/gstreamer/cerbero/-/merge_requests/1423>

1 files changed, 8 insertions, 7 deletions

diff --git a/cerbero/commands/cache.py b/cerbero/commands/cache.py
index 8e9ab348..0cae283d 100644
--- a/cerbero/commands/cache.py
+++ b/cerbero/commands/cache.py
@@ -174,17 +174,18 @@ class FetchCache(BaseCache):
         return None
 
     async def fetch_dep(self, config, dep, namespace):
+        is_ci = 'CI' in os.environ
         try:
             dep_path = os.path.join(config.home_dir, os.path.basename(dep['url']))
             m.action(f'Downloading deps cache {dep["url"]}')
-            await shell.download(dep['url'], dep_path, overwrite=True)
-            if dep['checksum'] == self.checksum(dep_path):
-                m.action(f'Unpacking deps cache {dep_path}')
-                await shell.unpack(dep_path, config.home_dir)
-            else:
+            await shell.download(dep['url'], dep_path, overwrite=is_ci)
+            if dep['checksum'] != self.checksum(dep_path):
                 m.warning('Corrupted dependency file, ignoring.')
-            m.action('Unpack complete, deleting artifact')
-            os.remove(dep_path)
+            m.action(f'Unpacking deps cache {dep_path}')
+            await shell.unpack(dep_path, config.home_dir)
+            if is_ci:
+                m.action('Unpack complete, deleting artifact')
+                os.remove(dep_path)
 
             # We need to relocate pc files that weren't generated by meson and
             # python programs installed with pip because the shebang set by the