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import os
import os.path
import string
import subprocess
import sys
import tempfile
import traceback
import utilfunctions
class VersionFileBuilder:
VERSION_TMPL = 'const wchar_t *GITVersion = L"%s";\nconst wchar_t *GITDate = L"%s";\n'
def __init__(self, workfile, outfile, gitpath="git", out=sys.stdout,
err=sys.stderr):
self.workfile = workfile
self.outfile = outfile
self.gitpath = gitpath
self.out = out
self.err = err
def rebuild(self):
"""Calls clean then build"""
self.clean()
self.build()
def clean(self):
"""Removes all temporary files and the output files that were passed,
if they exist"""
self.out.write("Cleaning...\n")
try:
self.out.write(" Removing %s: " % (self.filepath))
os.remove(self.filepath)
self.out.write("Done.\n")
except:
self.out.write("Failed!\n")
traceback.print_exc(None, self.err)
try:
self.out.write(" Removing %s: " % (self.workfile))
os.remove(self.workfile)
self.out.write("Done.\n")
except:
self.out.write("Failed!\n")
traceback.print_exc(None, self.err)
def build(self):
self.out.write("Checking if build is needed...\n")
if self.need_to_update():
self.out.write("Generating...\n")
self.out.write(" Writing to tempfile %s.\n" % (self.workfile))
if not utilfunctions.make_directory_for_filename(self.workfile):
self.out.write(" Directory already exists...\n")
with open(self.outfile, "wb") as out:
output = self.VERSION_TMPL % (self.get_git_id(), self.get_git_date())
out.write(output.encode(encoding='utf-8'))
self.out.write(" Done.\n")
else:
self.out.write(" Up to date.\n")
def get_git_id(self):
"""Return the git id string after striping the newline from the end
of the command output"""
id = tempfile.TemporaryFile()
s = "describe --long --dirty --abbrev=10 --tags --always"
s = s.split()
s.insert(0, self.gitpath)
subprocess.Popen(s, stdout=id).wait()
id.seek(0)
rawidoutput = id.readline()
idoutput = rawidoutput.decode(encoding='utf-8').split('\n')
# split on the line ending and return the first peice which will
# contain the entire id (all of the tags, etc) of the current
# repository without any newlines
return idoutput[0]
def get_git_date(self):
"""Return the git date string after stripping the newline from the
end of the command output"""
id = tempfile.TemporaryFile()
datecmd = 'log --pretty=format:%cd -n 1'
datecmd = datecmd.split()
datecmd.insert(0, self.gitpath)
subprocess.Popen(datecmd, stdout=id).wait()
id.seek(0)
rawdateoutput = id.readline()
dateoutput = rawdateoutput.decode(encoding='utf-8')
return dateoutput
def need_to_update(self):
"""Returns False if the self.outfile is up to date, True otherwise"""
if os.path.exists(self.workfile) == True:
if os.path.exists(self.outfile) == True:
# check the id to see if it has changed
workfile = open(self.workfile, 'rb')
if workfile.readline() == self.get_git_id():
return False
else:
self.out.write(" git id changed\n")
else:
self.out.write(" %s does not exist\n" % (self.outfile))
else:
self.out.write(" %s does not exist\n" % (self.workfile))
return True
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