apenwarr-redo/redo-stamp.py
Seamus Connor 190b4c34ff Replaced all instances of 'python' with 'python2'
On systems where 'python' refers to python3, redo
failed to launch. All invocations of python have been
made explicitly python2 invocations. All tests pass
on an Arch Linux system as of this commit.
2018-11-14 10:52:09 -08:00

53 lines
1.3 KiB
Python
Executable file

#!/usr/bin/env python2
import sys, os
import vars, state
from log import err, debug2
if len(sys.argv) > 1:
err('%s: no arguments expected.\n' % sys.argv[0])
sys.exit(1)
if os.isatty(0):
err('%s: you must provide the data to stamp on stdin\n' % sys.argv[0])
sys.exit(1)
# hashlib is only available in python 2.5 or higher, but the 'sha' module
# produces a DeprecationWarning in python 2.6 or higher. We want to support
# python 2.4 and above without any stupid warnings, so let's try using hashlib
# first, and downgrade if it fails.
try:
import hashlib
except ImportError:
import sha
sh = sha.sha()
else:
sh = hashlib.sha1()
while 1:
b = os.read(0, 4096)
sh.update(b)
if not b: break
csum = sh.hexdigest()
if not vars.TARGET:
sys.exit(0)
me = os.path.join(vars.STARTDIR,
os.path.join(vars.PWD, vars.TARGET))
f = state.File(name=me)
changed = (csum != f.csum)
debug2('%s: old = %s\n' % (f.name, f.csum))
debug2('%s: sum = %s (%s)\n' % (f.name, csum,
changed and 'changed' or 'unchanged'))
f.is_generated = True
f.is_override = False
f.failed_runid = None
if changed:
f.set_changed() # update_stamp might not do this if the mtime is identical
f.csum = csum
else:
# unchanged
f.set_checked()
f.save()
state.commit()