feat: derive default cache tarball name from Debian release

This allows us to more easily switch between Debian releases with the
cache mucking things up.

Sponsored-by: author

1 files changed, 9 insertions, 2 deletions

diff --git a/v-i b/v-i
index 18141ff..761323b 100755
--- a/v-i
+++ b/v-i
@@ -379,6 +379,10 @@ def vmdb_spec(system, ansible_vars):
     return {"steps": steps}
 
 
+def cache_name(spec):
+    return f"{spec.debian_release}.cache.tar.gz"
+
+
 class SystemSpec:
     def __init__(self, filename):
         REQUIRED = "required"
@@ -445,7 +449,7 @@ def main():
     p.add_argument("--verbose", action="store_true")
     p.add_argument("--very-verbose", action="store_true")
     p.add_argument("--log", default="install.log")
-    p.add_argument("--cache", default="cache.tar.gz")
+    p.add_argument("--cache", default=None)
     p.add_argument("spec")
     args = p.parse_args()
 
@@ -463,6 +467,9 @@ def main():
     system = SystemSpec(args.spec)
     log(f"spec: {system!r}")
 
+    cache = args.cache or cache_name(system)
+    log(f"cache: {cache}")
+
     ansible_vars = dict(system.ansible_vars)
     ansible_vars["hostname"] = system.hostname
     for filename in system.ansible_vars_files:
@@ -490,7 +497,7 @@ def main():
 
     argv = [
         "vmdb2",
-        f"--rootfs-tarball={args.cache}",
+        f"--rootfs-tarball={cache}",
         f"--log={args.log}",
         f"--image={system.drive}",
         specfile,