cb - A leak-proof tee to the clipboard - Unify the copy and paste commands into one intelligent chainable command.

README.MD

cb

A leak-proof tee to the clipboard

This script is modeled after tee (see man tee).

It's like your normal copy and paste commands, but unified and able to sense when you want it to be chainable

Examples

Copy

$ echo -n $(date) | cb
# clipboard contains: Tue Jan 24 23:00:00 EST 2017
# but, because of `echo -n` there is no newline at the end

Paste

# clipboard retained from the previous block
$ cb
Tue Jan 24 23:00:00 EST 2017
# above there is a newline after the output for readability
# below there is no newline because cb recognized that it was outputing to a pipe and any alterations would "contaminate" the data
$ cb | cat
Tue Jan 24 23:00:00 EST 2017$ cb > foo
# look carefully at this   ^^ that's a new $ prompt at the end of the content exactly as copied
$ cat foo
Tue Jan 24 23:00:00 EST 2017

Chaining

$ date | cb | tee updates.log
Tue Jan 24 23:11:11 EST 2017
$ cat updates.log
Tue Jan 24 23:11:11 EST 2017
# clipboard contains: Tue Jan 24 23:11:11 EST 2017

cb

#!/bin/bash

if [[ -p /dev/stdin ]]; then # stdin is a pipe
    p0=1
else
    p0=0
fi

if [[ -t 0 ]]; then          # stdin is a tty
    t0=1
else
    t0=0
fi

if [[ -t 1 ]]; then          # stdout is a tty
    t1=1
else
    t1=0
fi

if [[ -f /proc/version ]] && grep -q Microsoft /proc/version; then
    os="WSL"
else
    unameOut="$(uname -s)"
    case "${unameOut}" in
        Linux*)     os=LINUX;;
        Darwin*)    os=MAC;;
        CYGWIN*)    os=CYGWIN;;
    esac
fi

LINUX_copy(){
    cat | xclip -selection clipboard
}

LINUX_paste(){
    xclip -selection clipboard -o
}

WSL_copy(){
    cat | /mnt/c/Windows/System32/clip.exe
}

WSL_paste(){
    /mnt/c/Windows/System32/WindowsPowerShell/v1.0/powershell.exe Get-Clipboard | sed 's/\r//'
}

CYGWIN_copy(){
    cat > /dev/clipboard
}

CYGWIN_paste(){
    cat /dev/clipboard
}


MAC_copy(){
    cat | pbcopy
}

MAC_paste(){
    pbpaste
}

if [[ $p0 -eq 1 || $t0 -eq 0 ]]; then # stdin is pipe-ish
    ${os}_copy # so send it to the clipboard
    if [[ $t1 -eq 0 ]]; then # also, stdout is not a tty (meaning it must be a pipe or redirection)
        ${os}_paste # so pass that pipe/redirection the content of the clipboard (enables `man tee` like chaining)
    fi
else # stdin is not a pipe
    ${os}_paste # so output the clipboard
    if [[ $t1 -eq 1 ]]; then # stdout is a tty (so we don't have to be strict about not altering the output)
        echo # prevent the prompt from being on the same line
    fi
fi