From 52b3ff7fe380b366e5d790d6c1169664d71c384a Mon Sep 17 00:00:00 2001
From: Eric Villard <dev@eviweb.fr>
Date: Tue, 30 Aug 2022 09:52:05 +0200
Subject: [PATCH] =?UTF-8?q?feat:=20=E2=9C=A8=20add=20installer=20script?=
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Signed-off-by: Eric Villard <dev@eviweb.fr>
---
 install.sh | 218 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 218 insertions(+)
 create mode 100755 install.sh

diff --git a/install.sh b/install.sh
new file mode 100755
index 0000000..153bad1
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,218 @@
+#! /usr/bin/env bash
+#
+# Configuration Installer
+#
+
+VERSION="0.1.0"
+
+main_dir()
+{
+    dirname "$(readlink -f "${BASH_SOURCE}")"
+}
+
+config_copy_dir()
+{
+    echo "$(main_dir)/config/copy"
+}
+
+config_link_dir()
+{
+    echo "$(main_dir)/config/link"
+}
+
+config_run_dir()
+{
+    echo "$(main_dir)/config/run"
+}
+
+log()
+{
+    echo -e "$@"
+}
+
+version()
+{
+    cat << VERSION
+Configuration Installer
+    Version: ${VERSION}
+VERSION
+}
+
+usage()
+{
+    version
+
+    cat << USAGE
+    Usage: 
+        Run ./install.sh [OPTIONS]
+
+        Options:
+            -f              force overwriting files
+            -h              display this help message
+            -V              display the version number
+            -v              set verbosity level, can be used multiple times            
+USAGE
+}
+
+find_files()
+{
+    local directory="$1"
+
+    find "${directory}" -type f -and \( -path "*/common/*" -or -path "*/${HOSTNAME}/*" \)
+}
+
+get_target_file()
+{
+    local sourcefile="$1"
+
+    if [[ "${sourcefile}" =~ \/common ]]; then
+        echo "${sourcefile/*\/common/}"
+    else
+        echo "${sourcefile/*\/${HOSTNAME}/}"
+    fi    
+}
+
+ensure_parent_dir()
+{
+    local parentdir="$(dirname "$1")"
+
+    [ -f "${parentdir}" ] || mkdir -p "${parentdir}"
+}
+
+assert_same_file()
+{
+    local file1="$1"
+    local file2="$2"
+
+    cmp --silent "${file1}" "${file2}"
+}
+
+assert_same_source()
+{
+    local source="$1"
+    local link="$2"
+
+    [ "${source}" == "$(readlink -f "${link}")" ]
+}
+
+is_sourced()
+{
+    [ "${BASH_SOURCE[0]}" != "${0}" ]
+}
+
+is_verbosed()
+{
+    local level="$1"
+
+    [ -n "${level}" ] || level=1
+
+    [ "${VERBOSITY}" -ge "${level}" ]
+}
+
+copy_files()
+{
+    local files=( $(find_files "$(config_copy_dir)") )
+    local targetfile
+    local msg=""
+
+    for file in "${files[@]}"; do
+        targetfile="$(get_target_file "${file}")"
+        msg="   Copy ${file/$(main_dir)/.} to ${targetfile}"
+
+        ensure_parent_dir "${targetfile}"
+        cp -a "${OVERWRITING}" "${file}" "${targetfile}"
+
+        if assert_same_file "${file}" "${targetfile}"; then
+            msg="${msg}: \e[32mSucceed\e[0m"
+        else
+            msg="${msg}: \e[31mFailed\e[0m"
+        fi
+
+        is_verbosed && log "${msg}"
+    done
+}
+
+link_files()
+{
+    local files=( $(find_files "$(config_link_dir)") )
+    local targetfile
+    local msg=""
+
+    for file in "${files[@]}"; do
+        targetfile="$(get_target_file "${file}")"
+        msg="   Link ${file/$(main_dir)/.} to ${targetfile}"
+
+        ensure_parent_dir "${targetfile}"
+        ln -s "${OVERWRITING}" "${file}" "${targetfile}"
+
+        if assert_same_source "${file}" "${targetfile}"; then
+            msg="${msg}: \e[32mSucceed\e[0m"
+        else
+            msg="${msg}: \e[31mFailed\e[0m"
+        fi
+
+        is_verbosed && log "${msg}"
+    done
+}
+
+run_scripts()
+{
+    local scripts=( $(find_files "$(config_run_dir)") )
+    local msg=""
+    local result
+
+    for script in "${scripts[@]}"; do
+        msg="    Run ${script/$(main_dir)/.}"
+        result="$(bash -c "${script}")"
+
+        if [ "$?" -eq 0 ]; then
+            msg="${msg}: \e[32mSucceed\e[0m"
+        else
+            msg="${msg}: \e[31mFailed\e[0m"
+        fi
+
+        is_verbosed && log "${msg}"
+        is_verbosed 2 && log "${result}"
+    done
+}
+
+if ! is_sourced; then
+    VERBOSITY=0
+    OVERWRITING="-i"
+
+    while getopts "fhVv" option; do
+        case "${option}" in
+            f)  OVERWRITING="-f"
+                ;;
+            h)  usage && exit 0
+                ;;
+            V)  version && exit 0
+                ;;
+            v)  ((VERBOSITY=VERBOSITY+1))
+                ;;
+            \?) log "\e[31mInvalid Option: ${OPTARG}\e[0m" && exit 1
+                ;;
+        esac
+    done
+
+    if [ -d "$(config_copy_dir)" ]; then
+        log "\e[34mCopy configuration files...\e[0m"
+        copy_files
+    else
+        log "\e[34mNothing to copy\e[0m"
+    fi
+
+    if [ -d "$(config_link_dir)" ]; then
+        log "\e[34mLink configuration files...\e[0m"
+        link_files
+    else
+        log "\e[34mNothing to link\e[0m"
+    fi
+
+    if [ -d "$(config_link_dir)" ]; then
+        log "\e[34mRun configuration scripts...\e[0m"
+        run_scripts
+    else
+        log "\e[34mNothing to execute\e[0m"
+    fi
+fi