#!/bin/bash
#
# HG wrappers

## Run `hg ...` within $REPO.
function hg {
    local repo=$1; shift
    cmd $HG -R "$repo" "${HG_ARGS[@]}" "$@"
}

## Does the repo have local modifications?
function hg_modified {
    hg $1 id -i | grep -q '+'
}

## Get the date for the current commit as an unix timestamp
function hg_time {
    local repo=$1
    local hg_unix=
    local hg_tz=

    local hg_date=$(hg $repo log -r . --template '{date|hgdate}')
    local hg_unix=${hg_date% *}
    local hg_tz=${hg_date#* }

    [ -n "$hg_unix" ] || fail "failed to read hg time"

    echo "$hg_unix"
}

## Show changes in repo
#   hg_diff     [path ...]
function hg_diff {
    local repo=$1; shift
    hg $repo diff "$@"
}

## Commit changes in repo, with given message:
#
#   hg_commit   .../etc $msg
#
# Automatically determines possible -u to use when running with sudo.
function hg_commit {
    local repo="$1"
    local msg="$2"
    local user_opt=
    local msg_opt=

    if [ ${SUDO_USER:-} ]; then
        user_opt=('-u' "$SUDO_USER")

    elif [ $HOME ] && [ -e $HOME/.hgrc ]; then
        debug "using .hgrc user"
        user_opt=( )

    else
        user_opt=('-u' "$USER")
    fi
    
    if [ "$msg" ]; then
        msg_opt=('-m' "$msg")
    fi
   
    # XXX:  there's something about bash arrays that I don't like... empty arrays behave badly
    #       mercurial does not like it if you pass it '' as an argument
    if [ -n "${user_opt:-}" -a -n "${msg_opt:-}" ]; then
        hg $repo commit "${user_opt[@]}" "${msg_opt[@]}"
    elif [ -n "${user_opt:-}" ]; then
        hg $repo commit "${user_opt[@]}"
    elif [ -n "${msg_opt:-}" ]; then
        hg $repo commit "${msg_opt[@]}"
    else
        hg $repo commit
    fi
}