activate.sh

#!/bin/bash
#
# activate.sh
#
# - Sets up the shell environment.
#
# - Dependency functions are defined here for simplicity, rather than in
#   separate scripts or ".dot.sh" files.


function ,realpath() {
    # Get absolute path without depending on `realpath` or `readlink`, which
    # aren't installed on OS X by default (at least on some older versions).
    echo "$(cd "$(dirname "$1")" && pwd -P)/$(basename "$1")"
}


function ,path() {
    # usage: ,path [--prepend] [<directories>]
    #
    # Adds current directory or given directories to path. If --prepend not
    # given, directories are appended.
    #
    # Also updates $_OLD_VIRTUAL_PATH set by Python's virtualenv, so that path
    # changes persist through a venv deactivate command.
    if [[ -z "$1" ]]; then
        echo 'PATH: '
        IFS=: eval printf "%s\\\n" \$${1:-PATH}
        return 0
    fi

    if [[ $1 = "--prepend" ]]; then
        prepend=true
        paths=(${@:2})
    else
        prepend=false
        paths=($@)
    fi

    if [ -z "$paths" ]; then
        paths[0]=$PWD
    fi

   for path in "${paths[@]}"; do

       # Ignore paths that don't exist
       if [ ! -f "$path" ] && [ ! -d "$path" ]; then
           continue
        fi

        fullpath="$(cd "$path"; echo $PWD)"

        if [[ ":$PATH:" != *":$fullpath:"* ]]; then

            if [[ "$prepend" = true ]]; then
                export PATH="$fullpath:$PATH"
                export _OLD_VIRTUAL_PATH="$fullpath:$PATH"
            else
                export PATH="$PATH:$fullpath"
                export _OLD_VIRTUAL_PATH="$PATH:$fullpath"
            fi
        fi
    done
}


function ,dotfiles-ls {
    # In numerical order, list paths ending in .dot.xx.sh, then list paths
    # ending in .dot.sh.

    if [[ $(uname -a) == *Darwin* ]]; then
        for f in $(find -E $DOTFILES -regex '.+\.dot\.[0-9][0-9]\.sh' | sort -t "." -k 2); do echo $f; done
    else
        for f in $(find $DOTFILES -regextype posix-extended -regex '.+\.dot\.[0-9][0-9]\.sh'| sort -t "." -k 2); do echo $f; done
    fi
    for f in $(find "$DOTFILES" -name "*.dot.sh"); do echo "$f"; done
}


# $DOTFILES represents this directory
THIS_FILE=${BASH_SOURCE[0]}
export DOTFILES=$(dirname "$(,realpath "$THIS_FILE")")

# Append all "bin" directories in $DOTFILES to $PATH
,path $(find $DOTFILES -type d -name bin)

# Source all ".dot.sh" files in $DOTFILES
for f in $(,dotfiles-ls); do
    source "$f"
done