Any way to conditionally add files to firmware build?

General
#1

I’ve recently found out about minify-ing files for the web (html/javascript/css) and have noticed a decent space saving (40% roughly for me).

Was wondering if there was some way to minify my html/javascript/css at build time and only include the minified files in my image instead of the full files in my repo.

If there is no way to do it by default I’ll probably rig up a bash script,

#2

Maybe this can help.

#3

Thanks for the tip @nliviu.

Pretty crude, but I’ve got this working for now which seems to serve my purpose:

#!/bin/bash

# exit when any command fails
set -e

git_diff="git diff"
output=$(eval "$git_diff")

check_for_uncommited_changes () {
    if [ -z "$output" ]; then
        echo "No uncommited changes, proceeding..."
        return 1
    else
        echo "Uncommited changes detected, exiting..."
        return 0
    fi
}

minimise_javascript () {
    echo "Minimising Javascript..."
    ./node_modules/uglify-js/bin/uglifyjs fs/script.js --mangle --output fs/script.js
    return $?
}

minimise_css () {
    echo "Minimising CSS..."
    ./node_modules/css-minify/bin/css-minify.js -f fs/layout.css -o fs/
    rm fs/layout.css
    mv fs/layout.min.css fs/layout.css
    return $?
}

minimise_html () {
    echo "Minimising HTML..."
     ./node_modules/html-minifier/cli.js fs/index.html -o fs/index.html --file-ext html --remove-comments --collapse-whitespace --minify-js true --minify-css true
    return $?
}

if check_for_uncommited_changes; then
    exit 1
else
    minimise_javascript
    minimise_css
    minimise_html
    echo "Success minifying..."

    mos build --local --platform esp32
    git checkout HEAD -- fs/layout.css
    git checkout HEAD -- fs/script.js
    git checkout HEAD -- fs/index.html
fi