#!/usr/bin/env bash
#
# build_all_examples base_branch [resume_point]
#

GITREPO=https://github.com/MarlinFirmware/Configurations.git
STAT_FILE=./.pio/.buildall

# Check dependencies
which curl 1>/dev/null 2>&1 || { echo "curl not found! Please install it."; exit ; }
which git 1>/dev/null 2>&1 || { echo "git not found! Please install it."; exit ; }

SED=$(command -v gsed 2>/dev/null || command -v sed 2>/dev/null)
[[ -z "$SED" ]] && { echo "No sed found, please install sed" ; exit 1 ; }

SELF=`basename "$0"`
HERE=`dirname "$0"`

# Check if called in the right location
[[ -e "Marlin/src" ]] || { echo -e "This script must be called from a Marlin working copy with:\n ./buildroot/bin/$SELF $1" ; exit ; }

if [[ $# -lt 1 || $# -gt 2 ]]; then
  echo "Usage: $SELF base_branch [resume_point]
  base_branch  - Configuration branch to download and build
  resume_point - Configuration path to start from"
  exit
fi

echo "This script downloads all Configurations and builds Marlin with each one."
echo "On failure the last-built configs will be left in your working copy."
echo "Restore your configs with 'git checkout -f' or 'git reset --hard HEAD'."

unset BRANCH
unset FIRST_CONF
if [[ -f "$STAT_FILE" ]]; then
  IFS='*' read BRANCH FIRST_CONF <"$STAT_FILE"
fi

# If -c is given start from the last attempted build
if [[ $1 == '-c' ]]; then
  if [[ -z $BRANCH || -z $FIRST_CONF ]]; then
    echo "Nothing to continue"
    exit
  fi
elif [[ $1 == '-s' ]]; then
  if [[ -n $BRANCH && -n $FIRST_CONF ]]; then
    SKIP_CONF=1
  else
    echo "Nothing to skip"
    exit
  fi
else
  BRANCH=${1:-"import-2.0.x"}
  FIRST_CONF=$2
fi

# Check if the current repository has unmerged changes
if [[ $SKIP_CONF ]]; then
  echo "Skipping $FIRST_CONF"
elif [[ $FIRST_CONF ]]; then
  echo "Resuming from $FIRST_CONF"
else
  git diff --quiet || { echo "The working copy is modified. Commit or stash changes before proceeding."; exit ; }
fi

# Create a temporary folder inside .pio
TMP=./.pio/build-$BRANCH
[[ -d "$TMP" ]] || mkdir -p $TMP

# Download Configurations into the temporary folder
if [[ ! -e "$TMP/README.md" ]]; then
  echo "Downloading Configurations from GitHub into $TMP"
  git clone --depth=1 --single-branch --branch "$BRANCH" $GITREPO "$TMP" || { echo "Failed to clone the configuration repository"; exit ; }
else
  echo "Using previously downloaded Configurations at $TMP"
fi

echo -e "Start building now...\n====================="
shopt -s nullglob
IFS='
'
CONF_TREE=$( ls -d "$TMP"/config/examples/*/ "$TMP"/config/examples/*/*/ "$TMP"/config/examples/*/*/*/ "$TMP"/config/examples/*/*/*/*/ | grep -vE ".+\.(\w+)$" )
DOSKIP=0
for CONF in $CONF_TREE ; do
  # Get a config's directory name
  DIR=$( echo $CONF | sed "s|$TMP/config/examples/||" )
  # If looking for a config, skip others
  [[ $FIRST_CONF ]] && [[ $FIRST_CONF != $DIR && "$FIRST_CONF/" != $DIR ]] && continue
  # Once found, stop looking
  unset FIRST_CONF
  # If skipping, don't build the found one
  [[ $SKIP_CONF ]] && { unset SKIP_CONF ; continue ; }
  # ...if skipping, don't build this one
  compgen -G "${CONF}Con*.h" > /dev/null || continue
  echo "${BRANCH}*${DIR}" >"$STAT_FILE"
  "$HERE/build_example" "internal" "$TMP" "$DIR" || { echo "Failed to build $DIR"; exit ; }
done

# Delete the temp folder and build state
[[ -e "$TMP/config/examples" ]] && rm -rf "$TMP"
rm "$STAT_FILE"