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Make dl-snapshot.py avoid dl'ing existing files

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Check for existence of file in dl_path before fetching with curl.
If file exists, compare hash with expected.

Also wrap tarfile.open() in contextlib.closing() to support older
python versions (<= 2.6).

This fixes part of #1525.
This commit is contained in:
Hans Jørgen Hoel 2015-05-19 01:27:29 +02:00
parent 3721b634d5
commit 79cb5b9106
1 changed files with 16 additions and 7 deletions
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23
src/etc/dl-snapshot.py
View file

@ -5,6 +5,7 @@ import subprocess
import sys
import tarfile
import shutil
import contextlib
with open('src/snapshots.txt') as f:
lines = f.readlines()
@ -70,14 +71,22 @@ if not os.path.isdir('target/dl'):
if os.path.isdir(dst):
shutil.rmtree(dst)
ret = subprocess.call(["curl", "-o", dl_path, url])
if ret != 0:
raise Exception("failed to fetch url")
h = hashlib.sha1(open(dl_path, 'rb').read()).hexdigest()
if h != hash:
raise Exception("failed to verify the checksum of the snapshot")
exists = False
if os.path.exists(dl_path):
h = hashlib.sha1(open(dl_path, 'rb').read()).hexdigest()
if h == hash:
print("file already present %s (%s)" % (dl_path, hash,))
exists = True
with tarfile.open(dl_path) as tar:
if not exists:
ret = subprocess.call(["curl", "-o", dl_path, url])
if ret != 0:
raise Exception("failed to fetch url")
h = hashlib.sha1(open(dl_path, 'rb').read()).hexdigest()
if h != hash:
raise Exception("failed to verify the checksum of the snapshot")
with contextlib.closing(tarfile.open(dl_path)) as tar:
for p in tar.getnames():
name = p.replace("cargo-nightly-" + triple + "/", "", 1)
fp = os.path.join(dst, name)