jlj

#!/bin/bash

# Helper to jump to julia package source
function jlj()
{
    if [[ $# != 1 ]]; then
        echo "Usage: jlj <package name>" >&2
        return
    fi

    PKG="$1"
    DEPOTS1=$(echo ${JULIA_DEPOT_PATH:-${HOME}/.julia} | cut -d':' -f1)

    # First, check to see if we've got a `dev`'ed version around
    if [[ -d ${DEPOTS1}/dev/${PKG} ]]; then
        cd ${DEPOTS1}/dev/${PKG}
        
        # Spit out `git status` just for fun
        echo "Found ${PKG} dev'ed out to ${DEPOTS1}/dev/${PKG}..."
        git status
        return
    fi

    # If not, we're going to look in `packages`; make sure it exists at all:
    if [[ ! -d ${DEPOTS1}/packages/${PKG} ]]; then
        echo "${PKG} is not installed at all!" >&2
        return
    fi

    # If we don't have a `dev`'ed version around, then see if there's only one version installed:
    VERSIONS=(${DEPOTS1}/packages/${PKG}/*)
    if [[ ${#VERSIONS[@]} == 1 ]]; then
        cd ${VERSIONS[0]}
        echo "Found ${PKG} installed in ${VERSIONS[0]}..."
        return
    fi

    # Otherwise, ask Julia where it comes from
    JULIA=${JULIA:-julia}
    PKG_DIR=$(${JULIA} -e "using ${PKG}; println(dirname(dirname(Base.pathof(${PKG}))))" 2>/dev/null)
    if [[ ! -d ${PKG_DIR} ]]; then
        echo "Unable to find package ${PKG}, probably not installed in this environment!" >&2
        return
    fi

    echo "Found ${PKG} (1 of ${#VERSIONS[@]}) installed at ${PKG_DIR}..."
    cd ${PKG_DIR}
    return
}