import config.base
import os
import re

def noCheck(command, status, output, error):
  ''' Do no check result'''
  return

class Configure(config.base.Configure):
  def __init__(self, framework):
    config.base.Configure.__init__(self, framework)
    self.isClone = 0
    return

  def setupDependencies(self, framework):
    self.sourceControl = framework.require('config.sourceControl',self)
    self.petscdir = framework.require('PETSc.options.petscdir', self)
    return

  def configureInstallationMethod(self):
    if os.path.exists(os.path.join(self.petscdir.dir,'bin','maint')):
      self.logPrint('bin/maint exists. This appears to be a repository clone')
      self.isClone = 1
      if os.path.exists(os.path.join(self.petscdir.dir, '.git')):
        self.logPrint('.git directory exists')
        if hasattr(self.sourceControl,'git'):
          (o1, e1, s1) = self.executeShellCommand("cd "+self.petscdir.dir+" && "+self.sourceControl.git+" describe",checkCommand = noCheck)
          (o2, e2, s2) = self.executeShellCommand("cd "+self.petscdir.dir+" && "+self.sourceControl.git+" log -1 --pretty=format:%H",checkCommand = noCheck)
          (o3, e3, s3) = self.executeShellCommand("cd "+self.petscdir.dir+" && "+self.sourceControl.git+" log -1 --pretty=format:%ci",checkCommand = noCheck)
          (o4, e4, s4) = self.executeShellCommand('cd '+self.petscdir.dir+' && '+self.sourceControl.git+' branch',checkCommand = noCheck)
          if s2 or s3 or s4:
            self.logPrintBox('***** WARNING: Git branch check is giving errors! Checking the repo with "git status"')
            (o5, e5, s5) = self.executeShellCommand('cd '+self.petscdir.dir+' && '+self.sourceControl.git+' status',checkCommand = noCheck)
            self.logPrint(e5)
          else:
            if not o1: o1 = o2
            self.addDefine('VERSION_GIT','"'+o1+'"')
            self.addDefine('VERSION_DATE_GIT','"'+o3+'"')
            try:
              self.addDefine('VERSION_BRANCH_GIT','"'+re.compile('\* (.*)').search(o4).group(1)+'"')
            except:
              self.addDefine('VERSION_BRANCH_GIT','undetermined')
        else:
          self.logPrintBox('\n*****WARNING: PETSC_DIR appears to be a Git clone - but git is not found in PATH********\n')
      else:
        self.logPrint('This repository clone is obtained as a tarball as no .git dirs exist')
    else:
      if os.path.exists(os.path.join(self.petscdir.dir, '.git')):
        raise RuntimeError('Your petsc source tree is broken. Use "git status" to check, or remove the entire directory and start all over again')
      else:
        self.logPrint('This is a tarball installation')
    return

  def configure(self):
    self.executeTest(self.configureInstallationMethod)
    return