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Add a ./mach clean-snapshots command to remove old Cargo and Rust.

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Bootstrapping automatically downloads new Rust and Cargo snapshots
as needed into versioned directories,
but do not remove now-unused versions.
This is the desired behavior for `git bisect` to be usable.

However, this means that old version keep accumulating, taking up disk space.
This adds a mach command to remove snapshots other than the ones
currently being used.
It is never run automatically.

To be safe, the command defaults to only printing what would be removed,
and only removes stuff when run with a `-f` argument.
This commit is contained in:
Simon Sapin 2014-12-09 09:31:23 +00:00
parent 7d4ec33375
commit b337b0e5e0
1 changed files with 26 additions and 0 deletions
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26
python/servo/bootstrap_commands.py
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@ -152,3 +152,29 @@ class MachCommands(CommandBase):
["git", "submodule", "--quiet", "sync", "--recursive"])
subprocess.check_call(
["git", "submodule", "update", "--init", "--recursive"])
@Command('clean-snapshots',
description='Clean unused snapshots of Rust and Cargo',
category='bootstrap')
@CommandArgument('--force', '-f',
action='store_true',
help='Actually remove stuff')
def clean_snapshots(self, force=False):
rust_current = self.rust_snapshot_path().split('/')[0]
cargo_current = self.cargo_build_id()
print("Current Rust version: " + rust_current)
print("Current Cargo version: " + cargo_current)
action = "Removing " if force else "Would remove "
for current, base in [(rust_current, "rust"), (cargo_current, "cargo")]:
base = path.join(self.context.sharedir, base)
for name in os.listdir(base):
if name != current:
name = path.join(base, name)
if force:
print("Removing " + name)
shutil.rmtree(name)
else:
print("Would remove " + name)
if not force:
print("Nothing done. "
"Run `./mach clean-snapshots -f` to actually remove.")