makensis

#!/bin/bash
# License CC0-1.0 🍷
# This shell-script is public-domain because developers strong together 
# and holy fuck windows builds are bad enough as is.

# makensis
# A bash wrapper to run makensis.exe using system wine when building on MacOS/Linux
#
#   Electron Builder Provides this Script 3 Input Types:
#     > STDIN > A procedurally generated NSIS file is passed as string via STDIN
#     > ARGS  > Various paths passed in via command line args 
#     > ENV   > Two paths passed via ENV vars
#
#   This script primarily mutates native MacOS/Linux paths from above
#   to their "Z:\" wine equivelant. 
#
#   Electron Builder is hardcoded to call 
#    :>: <CacheNsisDir>/mac/makensis or 
#    :>: <CacheNsisDir>/linux/makensis respectively
#
#   We intercept this at the very last moment and re-route it to native
#   system wine and <CacheNsisDir>/Bin/makensis.exe
#
# =========================================================================


# =========================================================================
# First we grab the content of stdin and make sure it's not empty.
# -> (Electron Builder passes in a procedurally generated NSIS file)
# =========================================================================
STDIN_CONTENT=$(cat)
if [ -z "$STDIN_CONTENT" ]; then
    printf "❌ [makensis error] : -> No NSIS file passed via stdin to makensis bash script. Expects NSIS File via stdin.\n" >&2
    exit 1
fi
# Wine-ify all script paths in two steps: 
# ->  1) Add Z: drive label to double quoted paths starting with / 
# ->  2) Replace ALL slashes "/" between quotes with backslashes "\"
# EG: SomeNsisCmd "/Some/Native/FilePath" -> SomeNsisCmd "Z:\Some\Native\FilePath"
STDIN_CONTENT=$(echo "$STDIN_CONTENT" | sed -E '
  s|"(/[^"]+)"|"Z:\1"|g;
  :loop
  s|"([^"]*)/([^"]*)"|"\1\\\2"|g
  t loop
')


# =========================================================================
# Take input args and wine-ify detected native filepaths. 
#     ✅ SomeVar=/some/path ---> SomeVar=Z:\some\path
# =========================================================================
INPUT_ARGS="$@"
PROCESSED_ARGS=()
for arg in "$@"; do
    if [[ $arg == *"="* ]]; then
        # Split into pre-equals and post-equals parts
        pre_equals="${arg%%=*}"
        post_equals="${arg#*=}"
        
        # Check if post-equals starts with a forward slash
        if [[ $post_equals == /* ]]; then
            # Replace first / with Z:\ and remaining / with \
            windows_path="Z:\\${post_equals:1}"
            windows_path="${windows_path//\//\\}"
            arg="${pre_equals}=${windows_path}"
        fi
    fi
    PROCESSED_ARGS+=("$arg")
done


# =========================================================================
# Wine-ify two ENV var paths and setup cache-location-path
#     ✅ /some/path ---> Z:\some\path
# =========================================================================
NSISDIR="Z:${NSISDIR//\//\\}"
PWD="Z:${PWD//\//\\}"

# Just one level up
NSIS_CACHE_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )/.." &> /dev/null && pwd )


# =========================================================================
# Run 🍷 native wine on ../Bin/makensis.exe with wine-ified inputs from Electron-Builder
# =========================================================================
echo "$STDIN_CONTENT" | exec wine "$NSIS_CACHE_DIR/Bin/makensis.exe" "${PROCESSED_ARGS[@]}"

# debug:
# echo "$STDIN_CONTENT" | grep "\!addplugindir"
# debug:
# echo "Start args count: $#"