change version and adds scripts for building tmux

packaging/rubygems/.gitignore

@@ -12,3 +12,7 @@ libexec/*
 
 tmp/*
 !tmp/.gitkeep
+
+data/*
+!data/.gitkeep
+!data/Dockerfile

packaging/rubygems/RELEASING.md

@@ -1,4 +1,9 @@
-## Prepare gems
+## Releasing
+
+### Requirements
+It assumes that there are already `overmind` and `tmux` binaries in the Github [release](https://github.com/DarthSim/overmind/releases/tag/v2.4.0).
+
+## Build gem
 
 To build gems for specific platforms, your Ruby version must be at least 3.0.
 This requirement exists because Ruby 3.0 introduced enhancements in RubyGems, including support for the `--platform` argument,
@@ -26,3 +31,18 @@ To build a gem for a specific platform:
 rake "overmind:build:linux[amd64]" # linux x86_64
 rake "overmind:build:macos[arm64]" # macos arm64
 ```
+
+## Prepare tmux
+We can build tmux binaries for Linux platforms (amd64/arm64/arm/386) via `Docker buildx' using
+```bash
+docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7,linux/386 -t tmux-multiarch:latest --output type=local,dest=./dist data
+```
+
+Run into `segfaults`? See this [GitHub issue for solutions] (https://github.com/docker/buildx/issues/314#issuecomment-1043156006).
+
+For MacOS, the `tmux` binaries can be prepared by running `scripts/generate_tmux.sh` on a MacOS machine:
+```bash
+./scripts/generate_tmux.sh
+```
+
+This script will also work on Linux, generating `tmux` binaries for that platform.

packaging/rubygems/data/Dockerfile

@@ -0,0 +1,38 @@
+FROM alpine:latest AS builder
+
+RUN apk update && apk add --no-cache \
+    build-base \
+    pkgconf \
+    curl \
+    autoconf \
+    automake \
+    libtool \
+    bison \
+    openssl-dev
+
+# THe place for libraries
+ENV TARGETDIR=/usr/local
+
+WORKDIR /tmp
+
+# Build libevent
+RUN curl -LO https://github.com/libevent/libevent/releases/download/release-2.1.12-stable/libevent-2.1.12-stable.tar.gz \
+    && tar -zxvf libevent-2.1.12-stable.tar.gz \
+    && cd libevent-2.1.12-stable \
+    && ./configure --prefix=$TARGETDIR --enable-shared && make && make install
+
+# Build ncurses
+RUN curl -LO https://ftp.gnu.org/pub/gnu/ncurses/ncurses-6.4.tar.gz \
+    && tar zxvf ncurses-6.4.tar.gz \
+    && cd ncurses-6.4 \
+    && ./configure --prefix=$TARGETDIR --with-default-terminfo-dir=/usr/share/terminfo --with-shared --with-terminfo-dirs="/etc/terminfo:/lib/terminfo:/usr/share/terminfo" --enable-pc-files --with-pkg-config-libdir=$TARGETDIR/lib/pkgconfig \
+    && make && make install
+
+# Download and build tmux
+RUN curl -LO https://github.com/tmux/tmux/releases/download/3.4/tmux-3.4.tar.gz \
+    && tar zxvf tmux-3.4.tar.gz \
+    && cd tmux-3.4 \
+    && PKG_CONFIG_PATH=$TARGETDIR/lib/pkgconfig ./configure --enable-static --prefix=$TARGETDIR && make && make install
+
+FROM scratch AS export-stage
+COPY --from=builder /usr/local/bin/tmux /bin/tmux

packaging/rubygems/lib/overmind/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Overmind
-  VERSION = "0.1.2"
+  VERSION = "2.4.0"
 end

packaging/rubygems/scripts/generate_tmux.sh

@@ -0,0 +1,69 @@
+#!/bin/bash
+
+if [ -z "$TMUX_INSTALL_DIR" ]; then
+  TMUX_INSTALL_DIR="/usr/local"
+fi
+
+TMUX_LIB_DIR="$TMUX_INSTALL_DIR/lib"
+
+OS=$(uname)
+echo "Detected OS: $OS"
+
+mkdir -p "$TMUX_INSTALL_DIR/bin"
+mkdir -p "$TMUX_LIB_DIR"
+LDFLAGS="-L$TMUX_LIB_DIR"
+CPPFLAGS="-I$TMUX_LIB_DIR/include"
+LIBS="-lresolv"
+TMUX_FLAGS="--enable-static"
+
+if [ "$OS" == "Darwin" ]; then
+    TMUX_FLAGS="--enable-utf8proc"
+fi
+
+TARGETDIR="$TMUX_INSTALL_DIR"
+
+# Build libevent
+curl -LO https://github.com/libevent/libevent/releases/download/release-2.1.12-stable/libevent-2.1.12-stable.tar.gz \
+  && tar -zxvf libevent-2.1.12-stable.tar.gz \
+  && cd libevent-2.1.12-stable \
+  && LDFLAGS="$LDFLAGS" CPPFLAGS="$CPPFLAGS" ./configure --prefix=$TARGETDIR --enable-shared && make && make install \
+  && cd ..
+
+# Build ncurses
+curl -LO https://ftp.gnu.org/pub/gnu/ncurses/ncurses-5.9.tar.gz \
+  && tar zxvf ncurses-5.9.tar.gz \
+  && cd ncurses-5.9 \
+  && LDFLAGS="$LDFLAGS" CPPFLAGS="$CPPFLAGS" ./configure --prefix=$TARGETDIR --with-shared --with-termlib --enable-pc-files && make && make install \
+  && cd ..
+
+# utf8proc for macos
+curl -LO https://github.com/JuliaStrings/utf8proc/releases/download/v2.9.0/utf8proc-2.9.0.tar.gz \
+  && tar zxvf utf8proc-2.9.0.tar.gz \
+  && cd utf8proc-2.9.0 \
+  && LDFLAGS="$LDFLAGS" CPPFLAGS="$CPPFLAGS" make prefix=$TARGETDIR && make install prefix=$TARGETDIR \
+  && cd ..
+
+# Download and build tmux
+curl -LO https://github.com/tmux/tmux/releases/download/3.4/tmux-3.4.tar.gz \
+  && tar zxvf tmux-3.4.tar.gz \
+  && cd tmux-3.4 \
+  && PKG_CONFIG_PATH="$TMUX_LIB_DIR/pkgconfig" LDFLAGS="$LDFLAGS" CPPFLAGS="$CPPFLAGS" LIBS="-lresolv -lutf8proc" ./configure $TMUX_FLAGS --prefix=$TARGETDIR && make && make install \
+  && cd ..
+
+if [ "$OS" == "Linux" ]; then
+    find "$TARGETDIR/lib" -name "libutf8proc*.so*" -exec cp {} "$TMUX_LIB_DIR" \;
+fi
+
+# Copy all libraries to TMUX_LIB_DIR and refresh dependencies` paths for MacOS using install_name_tool
+if [ "$OS" == "Darwin" ]; then
+    find "$TARGETDIR/lib" -name "*.dylib" -exec cp {} "$TMUX_LIB_DIR" \;
+
+    for lib in "$TMUX_LIB_DIR"/*.dylib; do
+        libname=$(basename "$lib")
+        install_name_tool -change "$TARGETDIR/lib/$libname" "@executable_path/../lib/$libname" "$TARGETDIR/bin/tmux"
+    done
+fi
+
+mv "$TARGETDIR/bin/tmux" "$TMUX_INSTALL_DIR/bin/tmux"
+
+echo "tmux has been installed to $TMUX_INSTALL_DIR/bin/tmux with dependencies in $TMUX_LIB_DIR"

packaging/rubygems/support/downloader/overmind_downloader.rb

@@ -1,13 +1,14 @@
 # frozen_string_literal: true
 
 require_relative "base_downloader"
+require_relative "../../lib/overmind/version"
 
 module Overmind
   module Downloader
     # Class for downloading Overmind binaries.
     class OvermindDownloader < BaseDownloader
       NAME = "overmind"
-      DEFAULT_VERSION = "2.4.0"
+      DEFAULT_VERSION = ::Overmind::VERSION
       BASE_URL = "https://github.com/DarthSim/overmind/releases/download/v%s/%s"
       TARGET_PATH = "libexec/overmind"
       ALLOWED_PLATFORMS = %w[