import os
import subprocess


def in_path(name):
    """
    Check whether or not a command line tool
    exists in the system path.

    @return boolean
    """
    for dirname in os.environ['PATH'].split(os.pathsep):
        if os.path.exists(os.path.join(dirname, name)):
            return True
    return False


def npm_exists(name):
    """
    Check whether or not a cli tool exists in a node_modules/.bin
    dir in os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'node_modules', '.bin', name)
    return os.path.exists(path)


def composer_exists(name):
    """
    Check whether or not a cli tool exists in vendor/bin/{name}
    relative to os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'vendor', 'bin', name)
    return os.path.exists(path)


def bundle_exists(name):
    """
    Check whether or not a ruby tool exists in
    the os.cwd using bundler.

    This assumes that you installed bundler packages
    into ./bundle as documented in the README.

    @return boolean
    """
    try:
        installed = subprocess.check_output(['bundle', 'list'])
    except OSError:
        return False
    return name in installed

import os
import subprocess


def in_path(name):
    """
    Check whether or not a command line tool
    exists in the system path.

    @return boolean
    """
    for dirname in os.environ['PATH'].split(os.pathsep):
        if os.path.exists(os.path.join(dirname, name)):
            return True
    return False


def npm_exists(name):
    """
    Check whether or not a cli tool exists in a node_modules/.bin
    dir in os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'node_modules', '.bin', name)
    return os.path.exists(path)


def composer_exists(name):
    """
    Check whether or not a cli tool exists in vendor/bin/{name}
    relative to os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'vendor', 'bin', name)
    return os.path.exists(path)


def bundle_exists(name):
    """
    Check whether or not a ruby tool exists in
    the os.cwd using bundler.

    This assumes that you installed bundler packages
    into ./bundle as documented in the README.

    @return boolean
    """
    try:
        installed = subprocess.check_output(['bundle', 'list'])
    except subprocess.CalledProcessError or OSError:
        return False
    return name in installed

Handle case where bundler exists, but there is no Gemfile
Handle case where bundler exists, but there is no Gemfile

```
adrian@kamek:~$ bundle list
Could not locate Gemfile
adrian@kamek:~$ echo $?
10
```

  import os
  import subprocess
  
  
  def in_path(name):
      """
      Check whether or not a command line tool
      exists in the system path.
  
      @return boolean
      """
      for dirname in os.environ['PATH'].split(os.pathsep):
          if os.path.exists(os.path.join(dirname, name)):
              return True
      return False
  
  
  def npm_exists(name):
      """
      Check whether or not a cli tool exists in a node_modules/.bin
      dir in os.cwd
  
      @return boolean
      """
      cwd = os.getcwd()
      path = os.path.join(cwd, 'node_modules', '.bin', name)
      return os.path.exists(path)
  
  
  def composer_exists(name):
      """
      Check whether or not a cli tool exists in vendor/bin/{name}
      relative to os.cwd
  
      @return boolean
      """
      cwd = os.getcwd()
      path = os.path.join(cwd, 'vendor', 'bin', name)
      return os.path.exists(path)
  
  
  def bundle_exists(name):
      """
      Check whether or not a ruby tool exists in
      the os.cwd using bundler.
  
      This assumes that you installed bundler packages
      into ./bundle as documented in the README.
  
      @return boolean
      """
      try:
          installed = subprocess.check_output(['bundle', 'list'])
-     except OSError:
+     except subprocess.CalledProcessError or OSError:
          return False
      return name in installed
  
Handle case where bundler exists, but there is no Gemfile
## Code Before:
import os
import subprocess


def in_path(name):
    """
    Check whether or not a command line tool
    exists in the system path.

    @return boolean
    """
    for dirname in os.environ['PATH'].split(os.pathsep):
        if os.path.exists(os.path.join(dirname, name)):
            return True
    return False


def npm_exists(name):
    """
    Check whether or not a cli tool exists in a node_modules/.bin
    dir in os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'node_modules', '.bin', name)
    return os.path.exists(path)


def composer_exists(name):
    """
    Check whether or not a cli tool exists in vendor/bin/{name}
    relative to os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'vendor', 'bin', name)
    return os.path.exists(path)


def bundle_exists(name):
    """
    Check whether or not a ruby tool exists in
    the os.cwd using bundler.

    This assumes that you installed bundler packages
    into ./bundle as documented in the README.

    @return boolean
    """
    try:
        installed = subprocess.check_output(['bundle', 'list'])
    except OSError:
        return False
    return name in installed

## Instruction:
Handle case where bundler exists, but there is no Gemfile
## Code After:
import os
import subprocess


def in_path(name):
    """
    Check whether or not a command line tool
    exists in the system path.

    @return boolean
    """
    for dirname in os.environ['PATH'].split(os.pathsep):
        if os.path.exists(os.path.join(dirname, name)):
            return True
    return False


def npm_exists(name):
    """
    Check whether or not a cli tool exists in a node_modules/.bin
    dir in os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'node_modules', '.bin', name)
    return os.path.exists(path)


def composer_exists(name):
    """
    Check whether or not a cli tool exists in vendor/bin/{name}
    relative to os.cwd

    @return boolean
    """
    cwd = os.getcwd()
    path = os.path.join(cwd, 'vendor', 'bin', name)
    return os.path.exists(path)


def bundle_exists(name):
    """
    Check whether or not a ruby tool exists in
    the os.cwd using bundler.

    This assumes that you installed bundler packages
    into ./bundle as documented in the README.

    @return boolean
    """
    try:
        installed = subprocess.check_output(['bundle', 'list'])
    except subprocess.CalledProcessError or OSError:
        return False
    return name in installed
