From 4742b8d3d31bc717818d060a5f730bddd3c4dc99 Mon Sep 17 00:00:00 2001
From: Dict Xiong <me@beardic.cn>
Date: Sat, 5 Nov 2022 19:12:55 +0800
Subject: [PATCH] preinstall_check

---
 install.sh      | 42 ++++++++++++++++++++++++++++++++++++++----
 tools/common.sh | 14 +++++++++++++-
 tools/msys2.sh  |  2 +-
 3 files changed, 52 insertions(+), 6 deletions(-)

diff --git a/install.sh b/install.sh
index a315f49..57ccfbd 100755
--- a/install.sh
+++ b/install.sh
@@ -3,6 +3,7 @@
 THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
 source "$THIS_DIR/tools/common.sh"
 
+
 if [[ ! "$DOTFILES" == "${HOME}"* ]]; then 
     fmt_fatal "\"$DOTFILES\" is not under \"$HOME\". aborting ..."
 fi
@@ -26,6 +27,30 @@ HOME_SYMLINKS_SRC[0]=".ssh/authorized_keys2"
 HOME_SYMLINKS_DST[0]=".ssh/authorized_keys2"
 
 
+preinstall_check()
+{
+    mandatory_commands=( "git" "zsh" "curl" "ping" )
+    optional_commands=( "python3" "vim" "tmux" )
+    for i in "${mandatory_commands[@]}"; do
+        if [[ ! -x "$(command -v $i)" ]]; then
+            fmt_info "all this utils are required: ${mandatory_commands[@]}"
+            fmt_info "install them manually or check scripts in tools/"
+            fmt_fatal "\"$i\" not found. aborting ..."
+        fi
+    done
+    for i in "${optional_commands[@]}"; do
+        if [[ ! -x "$(command -v $i)" ]]; then
+            fmt_warning "\"$i\" not found"
+            ask_for_Yn "continue anyway?"
+            if [[ "$?" == "0" ]]; then
+                fmt_info "all this utils are suggested: ${optional_commands[@]}"
+                fmt_info "install them manually or check scripts in tools/"
+                fmt_fatal "aborting ..."
+            fi
+        fi
+    done
+}
+
 install_file_content()
 {
     for ((i=0; i<${#HOME_FILES_PATH[@]}; i++)); do
@@ -101,13 +126,21 @@ uninstall_symlink()
 }
 
 install_crontab(){
-    fmt_note "installing \"$CRON_JOB\" to crontab ..."
-    ( crontab -l | grep -vxF "${CRON_JOB}" | grep -v "no crontab for"; echo "$CRON_JOB" ) | crontab -
+    if [[ -x $(command -v crontab) ]]; then
+        fmt_note "installing \"$CRON_JOB\" to crontab ..."
+        ( crontab -l | grep -vxF "${CRON_JOB}" | grep -v "no crontab for"; echo "$CRON_JOB" ) | crontab -
+    else
+        fmt_warning "crontab does not exist. skipping ..."
+    fi
 }
 
 uninstall_crontab(){
-    fmt_note "removing \"$CRON_JOB\" from crontab ..."
-    ( crontab -l | grep -vxF "$CRON_JOB" ) | crontab - 
+    if [[ -x $(command -v crontab) ]]; then
+        fmt_note "removing \"$CRON_JOB\" from crontab ..."
+        ( crontab -l | grep -vxF "$CRON_JOB" ) | crontab -
+    else
+        fmt_note "crontab does not exist. skipping ..."
+    fi
 }
 
 install_tmux_tpm(){
@@ -152,6 +185,7 @@ uninstall_update(){
 }
 
 install(){
+    preinstall_check
     install_update
     install_crontab
     install_file_content
diff --git a/tools/common.sh b/tools/common.sh
index 53dfa89..4dd3c85 100755
--- a/tools/common.sh
+++ b/tools/common.sh
@@ -38,7 +38,7 @@ supports_truecolor() {
 
 fmt_fatal() {
     printf '%sfatal: %s%s\n' "${FMT_BOLD}${FMT_RED}" "$*" "${FMT_RESET}" >&2
-    exit
+    exit 1
 }
 
 fmt_error() {
@@ -113,6 +113,18 @@ ask_for_yN()
     return 0
 }
 
+ask_for_Yn()
+{
+    while [[ -z "$DFS_QUIET" ]]; do
+        read -p "${FMT_YELLOW}$1${FMT_RESET} [Yn]: " yn
+        case $yn in
+            [Nn]* ) return 0;;
+            * ) return 1;;
+        esac
+    done
+    return 1
+}
+
 post_log()
 {
     python3 "${DOTFILES}/tools/log.py" "[$1] $2: $3"
diff --git a/tools/msys2.sh b/tools/msys2.sh
index a857c89..a0efa8c 100755
--- a/tools/msys2.sh
+++ b/tools/msys2.sh
@@ -13,7 +13,7 @@ set_mirror()
 pacman_S()
 {
     pacman -Syu
-    pacman -S tmux git zsh curl vim wget base-devel mingw-w64-x86_64-toolchain make cmake gcc zip unzip
+    pacman -S tmux git zsh curl vim wget base-devel mingw-w64-x86_64-toolchain make cmake gcc zip unzip python3 python3-pip
 }
 
 router()