struct: standard file structure (#11)

* mass change. staged, not tested

* still mass changed without test

* bug fix

* bug fix

tools/alpine.sh

@@ -1,9 +1,6 @@
 #!/bin/bash
 
-if [[ $USER != "root" ]]; then
-    echo "must run as root!"
-    exit 1
-fi
+set -e
 
 set_mirror()
 {

tools/common.sh

@@ -0,0 +1,157 @@
+#!/bin/bash
+
+THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
+export DOTFILES=$( cd "$THIS_DIR/.." && pwd )
+
+SUDO=''
+if (( $EUID != 0 )); then
+    SUDO='sudo'
+fi
+
+# Color settings
+# Source: https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh
+if [ -t 1 ]; then
+    is_tty() {
+        true
+    }
+else
+    is_tty() {
+        false
+    }
+fi
+
+supports_truecolor() {
+    case "$COLORTERM" in
+    truecolor|24bit) return 0 ;;
+    esac
+
+    case "$TERM" in
+    iterm           |\
+    tmux-truecolor  |\
+    linux-truecolor |\
+    xterm-truecolor |\
+    screen-truecolor) return 0 ;;
+    esac
+
+    return 1
+}
+
+fmt_fatal() {
+    printf '%sfatal: %s%s\n' "${FMT_BOLD}${FMT_RED}" "$*" "${FMT_RESET}" >&2
+    exit
+}
+
+fmt_error() {
+    printf '%serror: %s%s\n' "${FMT_RED}" "$*" "${FMT_RESET}" >&2
+}
+
+fmt_warning() {
+    printf '%swarning: %s%s\n' "${FMT_YELLOW}" "$*" "${FMT_RESET}" >&2
+}
+
+fmt_info() {
+    printf '%sinfo: %s\n' "${FMT_RESET}" "$*" >&1
+}
+
+fmt_note() {
+    printf '%s%s%s\n' "${FMT_GREEN}" "$*" "${FMT_RESET}" >&1
+}
+
+setup_color() {
+    # Only use colors if connected to a terminal
+    if ! is_tty; then
+        FMT_RAINBOW=""
+        FMT_RED=""
+        FMT_GREEN=""
+        FMT_YELLOW=""
+        FMT_BLUE=""
+        FMT_BOLD=""
+        FMT_RESET=""
+    return
+    fi
+
+    if supports_truecolor; then
+    FMT_RAINBOW="
+        $(printf '\033[38;2;255;0;0m')
+        $(printf '\033[38;2;255;97;0m')
+        $(printf '\033[38;2;247;255;0m')
+        $(printf '\033[38;2;0;255;30m')
+        $(printf '\033[38;2;77;0;255m')
+        $(printf '\033[38;2;168;0;255m')
+        $(printf '\033[38;2;245;0;172m')
+    "
+    else
+    FMT_RAINBOW="
+        $(printf '\033[38;5;196m')
+        $(printf '\033[38;5;202m')
+        $(printf '\033[38;5;226m')
+        $(printf '\033[38;5;082m')
+        $(printf '\033[38;5;021m')
+        $(printf '\033[38;5;093m')
+        $(printf '\033[38;5;163m')
+    "
+    fi
+
+    FMT_RED=$(printf '\033[31m')
+    FMT_GREEN=$(printf '\033[32m')
+    FMT_YELLOW=$(printf '\033[33m')
+    FMT_BLUE=$(printf '\033[34m')
+    FMT_BOLD=$(printf '\033[1m')
+    FMT_RESET=$(printf '\033[0m')
+}
+# END of color settings
+
+ask_for_yN()
+{
+    while true; do
+        read -p "${FMT_YELLOW}$1${FMT_RESET} [yN]: " yn
+        case $yn in
+            [Yy]* ) return 1;;
+            [Nn]* ) return 0;;
+            * ) return 0;;
+        esac
+    done
+}
+
+post_log()
+{
+    python3 "${DOTFILES}/tools/log.py" "[$1] $2: $3"
+}
+
+get_os_type() {
+    case "$(uname -s)" in
+        Darwin*)    ans="MacOS";;
+        CYGWIN*)    ans="Cygwin";;
+        MSYS*  )    ans="MSYS";;
+        Linux* )    ans="Linux";;
+        *)          ans="unknown";;
+    esac
+    echo $ans | tr '[:upper:]' '[:lower:]'
+}
+
+get_linux_dist() {
+    if [ -f /etc/os-release ]; then
+        . /etc/os-release
+        ans=$ID
+    elif type lsb_release >/dev/null 2>&1; then
+        ans=$(lsb_release -si)
+    elif [ -f /etc/lsb-release ]; then
+        . /etc/lsb-release
+        ans=$DISTRIB_ID
+    elif [ -f /etc/debian_version ]; then
+        ans=Debian
+    elif [ -f /etc/SuSe-release ]; then
+        ans=SUSE
+    elif [ -f /etc/redhat-release ]; then
+        ans=RedHat
+    else
+        ans=unknown
+    fi
+    echo $ans | tr '[:upper:]' '[:lower:]'
+}
+
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    $1 "${@:2}"
+else
+    setup_color
+fi

tools/msys2.sh

@@ -1,9 +1,6 @@
 #!/bin/bash
 
-if [[ $USER != "root" ]]; then
-    echo "must run as root!"
-    exit 1
-fi
+set -e
 
 set_mirror()
 {

tools/ubuntu.sh

@@ -1,9 +1,6 @@
 #!/bin/bash
 
-if [[ $USER != "root" ]]; then
-    echo "must run as root!"
-    exit 1
-fi
+set -e
 
 set_mirror()
 {