deploy

#!/bin/bash

# Usage:
#   DGR_VERSION=<target_appengine_version> DGR_APPLICATION=<target_appengine_instance> \
#     ./deploy [--force]
#
#     --force disabled checking whether the local copy has been modified
#
#   Deploys the current local git repo to app engine. Gets password from
#     ~/.weavrs_password
#   and app engine login (email address) from
#     ~/.weavrs_email
#   Tries hard to prevent deploys containing local changes.

if [[ ! -f ~/.weavrs_password ]]; then
    echo "put your weavrs deploy password into '~/.weavrs_password' and try again."
    exit 1
fi
PASSWORD=`cat ~/.weavrs_password`

if [[ ! -f ~/.weavrs_email ]]; then
    echo "put your weavrs deploy email address into '~/.weavrs_email' and try again."
    exit 1
fi
EMAIL=`cat ~/.weavrs_email`

FORCE=0
if [[ "$1" == "--force" ]]; then
    FORCE=1
fi

if [[ $FORCE -ne 1 ]]; then
    # http://stackoverflow.com/questions/855767/can-i-use-git-diff-on-untracked-files
    # http://stackoverflow.com/questions/2969214/git-programmatically-know-by-how-much-the-branch-is-ahead-behind-a-remote-branch

    untracked=$(git ls-files --others --exclude-standard)
    if [[ -n "$untracked" ]]; then
        echo "You have local untracked changes. Please commit them and push upstream, then try again."
        exit 1
    fi
    
    git diff --quiet HEAD
    if [[ $? -ne 0 ]]; then
        echo "You have local changes. Please commit them and push upstream, then try again."
        exit 1
    fi

    currentbranch=$(expr $(git symbolic-ref HEAD) : 'refs/heads/\(.*\)')
    if [[ -z "$currentbranch" ]]; then
        echo "You don't seem to be on a branch"
        exit 1
    fi
    remote=$(git config branch.$currentbranch.remote)
    remote_ref=$(git config branch.$currentbranch.merge)
    remote_branch=$(expr $remote_ref : 'refs/heads/\(.*\)')
    tracking_branch=refs/remotes/$remote/$remote_branch
    changes=`git rev-list $tracking_branch..$currentbranch 2>&1`
    if [[ -n "$changes" ]]; then
        echo "You have locally committed changes. Please push them upstream and try again."
        exit 1
    fi
fi

time (echo "$PASSWORD" | appcfg.py update --email="$EMAIL" --skip_sdk_update_check --passin .)