#!/bin/sh

echo "*** GET GLIBC BEGIN ***"

setglobal SRC_DIR = $[pwd]

# Grab everything after the '=' character.
setglobal DOWNLOAD_URL = $[grep -i ^GLIBC_SOURCE_URL .config | cut -f2 -d'=]

# Grab everything after the last '/' character.
setglobal ARCHIVE_FILE = $(DOWNLOAD_URL##*/)

# Read the 'USE_LOCAL_SOURCE' property from '.config'
setglobal USE_LOCAL_SOURCE = $[grep -i ^USE_LOCAL_SOURCE .config | cut -f2 -d'=]

if test $USE_LOCAL_SOURCE = "true" -a ! -f $SRC_DIR/source/$ARCHIVE_FILE  {
  echo "Source bundle $SRC_DIR/source/$ARCHIVE_FILE is missing and will be downloaded."
  setglobal USE_LOCAL_SOURCE = '"false'"
}

cd source

if test ! $USE_LOCAL_SOURCE = "true"  {
  # Downloading glibc source bundle file. The '-c' option allows the download to resume.
  echo "Downloading glibc source bundle from $DOWNLOAD_URL"
  wget -c $DOWNLOAD_URL
} else {
  echo "Using local glibc source bundle $SRC_DIR/source/$ARCHIVE_FILE"
}

# Delete folder with previously extracted glibc.
echo "Removing glibc work area. This may take a while..."
rm -rf ../work/glibc
mkdir ../work/glibc

# Extract glibc to folder 'work/glibc'.
# Full path will be something like 'work/glibc/glibc-2.23'.
tar -xvf $ARCHIVE_FILE -C ../work/glibc

cd $SRC_DIR

echo "*** GET GLIBC END ***"