From 5ad4393d9b8689476b8ede03f2b7d9c7ce7da683 Mon Sep 17 00:00:00 2001
From: ghe0 <gheorghe@gheo.tech>
Date: Tue, 5 Nov 2024 03:36:13 +0200
Subject: [PATCH] first scripts

---
 create.sh            | 12 +++++++++
 creator_exports.sh   |  6 +++++
 creator_functions.sh | 63 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+)
 create mode 100755 create.sh
 create mode 100755 creator_exports.sh
 create mode 100644 creator_functions.sh

diff --git a/create.sh b/create.sh
new file mode 100755
index 0000000..568e7c4
--- /dev/null
+++ b/create.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
+source creator_exports.sh
+source creator_functions.sh
+rm -rf "$ROOT" 2>/dev/null
+mkdir -p build "$ROOT" "${ROOT}/usr/bin/"
+cd build
+
+echo_blue "Starting installation at $ROOT."
+
+install_busybox || exit 1
+create_archive
diff --git a/creator_exports.sh b/creator_exports.sh
new file mode 100755
index 0000000..16baf15
--- /dev/null
+++ b/creator_exports.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+script_dir=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+# root of the initrd, that will be used to create the cpio archive
+export ROOT="${script_dir}/build/initrd_root"
+export BUSYBOX_PATH="/usr/lib/initcpio/busybox"
diff --git a/creator_functions.sh b/creator_functions.sh
new file mode 100644
index 0000000..079bca8
--- /dev/null
+++ b/creator_functions.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+
+echo_blue() {
+  echo -e "\033[34m$1\033[0m"
+}
+
+echo_red() {
+  echo -e "\033[0;31m$1\033[0m"
+}
+
+
+# Installs a library. Expects absolute path.
+install_lib() {
+  local lib="$1"
+  [[ -f "$lib" ]] || {
+    echo "Did not find library at path: $lib"
+    return 1
+  }
+
+  mkdir -p $(dirname "${ROOT}${lib}")
+  echo_blue "Adding library to root: $lib"
+  cp "$lib" "${ROOT}${lib}"
+}
+
+# Expects to receive the absolute path as the full argument.
+# Use `which binary_name` if it's in your path.
+# Installs to /usr/bin
+install_binary() {
+  local binary="$1" lib=''
+  [[ -f "$binary" ]] || {
+    echo_red "Did not find binary at path: $binary"
+    return 1
+  }
+
+  echo_blue "Adding binary to root: $binary"
+  cp "$binary" "${ROOT}/usr/bin/"
+
+  ldd_deps="$(ldd "$binary")"
+  if [[ $ldd_deps == *"not a dynamic executable"* ]]; then
+    return 0
+  fi
+
+  while read -r lib; do
+    install_lib "$lib"
+  done <<< "$( echo "$ldd_deps" | grep -F ' => ' | awk '{ print $3 }' )"
+}
+
+install_busybox() {
+  echo_blue "Installing busybox..."
+  [[ -f "$BUSYBOX_PATH" ]] || {
+    echo_red "Did not find busybox at $BUSYBOX_PATH"
+    echo_red "Please compile or download busybox. You can also change the path."
+    return 1
+  }
+  install_binary "$BUSYBOX_PATH"
+  for applet in $(/usr/lib/initcpio/busybox --list); do
+      ln -s busybox "${ROOT}/usr/bin/$applet" 
+  done
+}
+
+create_archive() {
+  find . | cpio -o -H newc | gzip > detee-$(hostnamectl hostname)-$(uname -r).cpio.gz
+}