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pythoncygwinvirtualenv

Cant start my virtual environment of flask through cygwin

Cant start my virtual environment of flask through cygwin :
my system :(windows 10)

Method 1:

$ env/Scripts/activate

Method 2:

$ env/Scripts/activate.bat

Method 3:

$ source ./env/Scripts/activate

on my cygwin cli, but it gives the following error all the time :

-bash: $'\r': command not found
-bash: ./env/Scripts/activate: line 4: syntax error near unexpected token `$'{\r''
'bash: ./env/Scripts/activate: line 4: `deactivate () {

Note : The first two methods of activating virtual environment works nicely on VSCode but not on cygwin.

My activate file :

# This file must be used with "source bin/activate" *from bash*
# you cannot run it directly

deactivate () {
    # reset old environment variables
    if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
        PATH="${_OLD_VIRTUAL_PATH:-}"
        export PATH
        unset _OLD_VIRTUAL_PATH
    fi
    if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
        PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
        export PYTHONHOME
        unset _OLD_VIRTUAL_PYTHONHOME
    fi

    # This should detect bash and zsh, which have a hash command that must
    # be called to get it to forget past commands.  Without forgetting
    # past commands the $PATH changes we made may not be respected
    if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
        hash -r 2> /dev/null
    fi

    if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
        PS1="${_OLD_VIRTUAL_PS1:-}"
        export PS1
        unset _OLD_VIRTUAL_PS1
    fi

    unset VIRTUAL_ENV
    if [ ! "${1:-}" = "nondestructive" ] ; then
    # Self destruct!
        unset -f deactivate
    fi
}

# unset irrelevant variables
deactivate nondestructive

VIRTUAL_ENV="D:\projects\websites\googleHostFlaskApp\env"
export VIRTUAL_ENV

_OLD_VIRTUAL_PATH="$PATH"
PATH="$VIRTUAL_ENV/Scripts:$PATH"
export PATH

# unset PYTHONHOME if set
# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
# could use `if (set -u; : $PYTHONHOME) ;` in bash
if [ -n "${PYTHONHOME:-}" ] ; then
    _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
    unset PYTHONHOME
fi

if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
    _OLD_VIRTUAL_PS1="${PS1:-}"
    PS1="(flask) ${PS1:-}"
    export PS1
fi

# This should detect bash and zsh, which have a hash command that must
# be called to get it to forget past commands.  Without forgetting
# past commands the $PATH changes we made may not be respected
if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
    hash -r 2> /dev/null
fi
Solution

  • As @Doug suggested , changing CR-LF to LF did worked. The error was due to difference in line endings.

    Unix systems (Linux and Mac) default to the LF (line feed) character for line breaks.
    Windows on the other hand is “special” and defaults to CR/LF (carriage return AND line feed).

    If you are using vscode like me: Then there is CRLF written at the bottom of vscodeenter image description here

    By clicking there you can change activate file from CRLFto LF and it will remove the error you are facing.