'''Change absolute shebangs to relative ones following a `pip` install

if not 'pip' in sys.modules:

return

appdir = os.getenv('APPDIR')

python_x_y = 'python{:}.{:}'.format(*sys.version_info[:2])

if sys.prefix != '{:}/opt/{:}'.format(appdir, python_x_y):

return

args = sys.argv[1:]

if 'install' in args:

for exe in os.listdir(sys.prefix + '/bin'):

path = os.path.join(sys.prefix, 'bin', exe)

if (not os.path.isfile(path)) or (not os.access(path, os.X_OK)) or \

exe.startswith('python') or os.path.islink(path) or \

exe.endswith('.pyc') or exe.endswith('.pyo'):

continue

try:

with open(path, 'r') as f:

header = f.read(2)

if header != '#!':

continue

content = f.read()

except:

continue

shebang, body = content.split(os.linesep, 1)

shebang = shebang.strip().split()

executable = shebang.pop(0)

if executable != sys.executable:

head, altbody = body.split(os.linesep, 1)

if head.startswith("'''exec' /"): # Patch for alt shebang

body = altbody.split(os.linesep, 1)[1]

executable = head.split()[1]

if executable != sys.executable:

continue

else:

continue

relpath = os.path.relpath(

sys.prefix + '/../../usr/bin/' + python_x_y,

sys.prefix + '/bin')

shebang.append('"$@"')

cmd = (

'"exec"',

'"$(dirname $(readlink -f ${0}))/' + relpath + '"',

'"$0"',

' '.join(shebang)

)

try:

with open(path, 'w') as f:

f.write('#! /bin/sh\n')

f.write(' '.join(cmd) + '\n')

f.write(body)

except IOError:

continue

if exe in _bin_at_start:

continue

usr_dir = os.path.join(sys.prefix, '../../usr/bin')

usr_exe = os.path.join(usr_dir, exe)

if not os.path.exists(usr_exe):

relpath = os.path.relpath(path, usr_dir)

os.symlink(relpath, usr_exe)

elif 'uninstall' in args:

usr_dir = os.path.join(sys.prefix, '../../usr/bin')

for exe in os.listdir(usr_dir):

path = os.path.join(usr_dir, exe)

if (not os.path.islink(path)) or \

os.path.exists(os.path.realpath(path)):

continue