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A bash file to download skins for Minetest for use wiith the u_skins mod.
#!/bin/bash
####
# Licenced under Attribution-NonCommercial-ShareAlike 4.0 International
# http://creativecommons.org/licenses/by-nc-sa/4.0/
#### ATTENTION ####
## This script requires that jq and coreutils are installed on your system ##
## In Debian-based distros, open a terminal and run
## sudo apt-get install jq coreutils
###################
# == Set variables ===
# ====================
NUMPAGES="1" # Number of pages. Default is 1 page
PERPAGE="2000" # Number of items per page. Default is 2000.
JSONURL="http://minetest.fensta.bplaced.net/api/get.json.php?getlist&page=$NUMPAGES&outformat=base64&per_page=$PERPAGE" # The URL to the database
PREVIEWURL="http://minetest.fensta.bplaced.net/skins/1/" # The url to the location of the previews.
temp=$PWD/tmp # Where the temp folder will be. Default is $PWD/tmp, which means that the tmp folder will be put in the current folder
METADEST=$PWD/u_skins/meta # This is the folder where the meta data will be saved
TEXTUREDEST=$PWD/u_skins/textures # This is the folder where the skins and the previews will be saved
# === Make a bunch of folders and download the db ===
# ===================================================
if [ -d "$temp" ]; then
rm -r $temp # If the temp dir exists we will remove it and its contents.
fi
mkdir $temp # Make a new temp dir. Redundant? No. We will get rid of it later.
if [ ! -d "$METADEST" ]; then # Check to see if the meta dir exists, and if not, create it
mkdir $METADEST
fi
if [ ! -d "$TEXTUREDEST" ]; then # Check to see if the textures dir exists, and if not, create it
mkdir $TEXTUREDEST
fi
wget $JSONURL -O $temp/rawdb.txt # Download the entire database
# === Do the JSON thing ===
# =========================
i="0" # This will be the counter.
while [ "$ID" != "null" ] # Repeat for as long as there is data to process
do
ID=$(cat $temp/rawdb.txt | jq ".skins[$i].id")
# The next lines are kinda complex. sed is being used to strip the quotes from the variables. I had help...
meta_name=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].name") | sed -e 's/^"//' -e 's/"$//')
meta_author=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].author") | sed -e 's/^"//' -e 's/"$//')
meta_license=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].license") | sed -e 's/^"//' -e 's/"$//')
if [[ "$ID" != "null" ]]; then # Check to see if ID has a value
echo "#"$ID "name:" $meta_name "author:" $meta_author "license:" $meta_license # Verbosity to show that the script is working.
echo $meta_name > $METADEST/character_$ID.txt # Save the meta data to files, this line overwrites the data inside the file
echo $meta_author >> $METADEST/character_$ID.txt # Save the meta data to files, this line is added to the file
echo $meta_license >> $METADEST/character_$ID.txt # Save the meta data to files, and this line is added to the file as well.
# === Extract and save the image from the JSON file ===
# ======================================================
skin=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].img") | sed -e 's/^"//' -e 's/"$//') # Strip the quotes from the base64 encoded string
echo $skin | base64 --decode > $TEXTUREDEST"/character_"$ID".png" # Decode the string, and save it as a .png file
# === Download a preview image whilst we're at it ===
# ====================================================
wget -nv $PREVIEWURL/$ID".png" -O $TEXTUREDEST"/character_"$ID"_preview.png" # Downloads a preview of the skin that we just saved.
fi
i=$[$i+1] # Increase the counter by one.
done
# === Now we'll clean up the mess ===
# ===================================
rm -r $temp # Remove the temp dir and its contents.
exit # Not strictly needed, but i like to use it to wrap things up.
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