無法shell腳本的內部時，命令執行

Question

所以今天晚上的大部分時間通過RVM永久影響Linux環境中活躍的Ruby版本，我一直在努力用bash腳本我寫，以幫助簡化/自動化/引導（無論你想調用它）我的開發環境，從頭開始創建一個新的Rails項目。

我正在模塊化編寫腳本，即編寫完全自己的腳本，這些腳本獨立於較大的整體腳本運行，然後將其整合到腳本流程中。

我與之戰鬥的當前scriptlet與交互式更改活動Ruby版本有關，如果您想要安裝的版本已經存在，並且如果您想要的版本不存在，它將安裝並設置爲活動版本。

這主要是一個增強整個過程，而不是在所有的腳本本身重要，但一個非常大的「錦上添花」，

至於是什麼，我在準備寫作已經完成此功能：

1. 設置我的終端接受殼登錄（Linux Mint的17.1）
2. 添加源$ HOME/.rvm /腳本/ RVM使RVM爲腳本中的函數運行

首先，我將粘貼代碼測試的輸出日誌，然後粘貼腳本代碼本身。注意：$ crver只是我創建的一個環境變量，它指向可執行腳本以節省輸入時間。

安裝Ruby的新版本：

gabrial@thinkpad ~ $ $crver 

rvm rubies 

=* ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

Is the version of Ruby you wish to use listed above? (Y/N) n 
Enter the Ruby version to install (ex: 2.2.2), followed by [ENTER]: 2.2.1 
Searching for binary rubies, this might take some time. 
No binary rubies available for: mint/17.1/x86_64/ruby-2.2.1. 
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies. 
Checking requirements for mint. 
Requirements installation successful. 
Installing Ruby from source to: /home/gabrial/.rvm/rubies/ruby-2.2.1, this may take a while depending on your cpu(s)... 
ruby-2.2.1 - #downloading ruby-2.2.1, this may take a while depending on your connection... 
ruby-2.2.1 - #extracting ruby-2.2.1 to /home/gabrial/.rvm/src/ruby-2.2.1.... 
ruby-2.2.1 - #applying patch /home/gabrial/.rvm/patches/ruby/2.2.1/fix_installing_bundled_gems.patch. 
ruby-2.2.1 - #configuring......................................................... 
ruby-2.2.1 - #post-configuration.. 
ruby-2.2.1 - #compiling............................................................................... 
ruby-2.2.1 - #installing............................. 
ruby-2.2.1 - #making binaries executable.. 
ruby-2.2.1 - #downloading rubygems-2.4.6 
ruby-2.2.1 - #extracting rubygems-2.4.6..... 
ruby-2.2.1 - #removing old rubygems......... 
ruby-2.2.1 - #installing rubygems-2.4.6..................... 
ruby-2.2.1 - #gemset created /home/gabrial/.rvm/gems/ruby-2.2.1@global 
ruby-2.2.1 - #importing gemset /home/gabrial/.rvm/gemsets/global.gems............................................... 
ruby-2.2.1 - #generating global wrappers........ 
ruby-2.2.1 - #gemset created /home/gabrial/.rvm/gems/ruby-2.2.1 
ruby-2.2.1 - #importing gemsetfile /home/gabrial/.rvm/gemsets/default.gems evaluated to empty gem list 
ruby-2.2.1 - #generating default wrappers........ 
ruby-2.2.1 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake). 
Install of ruby-2.2.1 - #complete 
Ruby was built without documentation, to build it run: rvm docs generate-ri 
Using /home/gabrial/.rvm/gems/ruby-2.2.1 
gabrial@thinkpad ~ $ rvm list 

rvm rubies 

    ruby-2.2.1 [ x86_64 ] 
=* ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

使用Ruby的預先存在的版本，並將其設置爲活動：

gabrial@thinkpad ~ $ $crver 

rvm rubies 

    ruby-2.2.1 [ x86_64 ] 
=* ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

Is the version of Ruby you wish to use listed above? (Y/N) y 
Enter the Ruby version to use (ex: 2.2.2), followed by [ENTER]: 2.2.1 
Using /home/gabrial/.rvm/gems/ruby-2.2.1 
gabrial@thinkpad ~ $ rvm list 

rvm rubies 

    ruby-2.2.1 [ x86_64 ] 
=* ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

正如你所看到的，在腳本它驗證它將Ruby的版本設置爲2.2.1，但在實際環境中，它仍然爲2.2.2

奇怪的是，我也嘗試使用rvm use $rubyver --default取得部分成功。當直接在命令行中運行的rvm list，它顯示了默認版本預期的符號，但紅寶石的活動版本保持不變：

gabrial@thinkpad ~ $ $crver 

rvm rubies 

    ruby-2.2.1 [ x86_64 ] 
=* ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

Is the version of Ruby you wish to use listed above? (Y/N) y 
Enter the Ruby version to use (ex: 2.2.2), followed by [ENTER]: 2.2.1 
Using /home/gabrial/.rvm/gems/ruby-2.2.1 
gabrial@thinkpad ~ $ rvm list 

rvm rubies 

* ruby-2.2.1 [ x86_64 ] 
=> ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

下面是腳本本身的代碼塊：

#!/bin/bash 
source $HOME/.rvm/scripts/rvm 

rvmexec() { 
    msg="Enter the Ruby version to $1 (ex: 2.2.2), followed by [ENTER]: " 
    case $1 in 
     [use]*) 
      read -p "$msg" rubyver 
      eval rvm use $rubyver 
      unset rubyver; 
      break;; 
     [install]*) 
      read -p "$msg" rubyver 
      eval rvm install $rubyver && rvm use $rubyver 
      unset rubyver; 
      break;; 
    esac 
} 

rvm list 
    while true; do 
     read -p "Is the version of Ruby you wish to use listed above? (Y/N) " rubyverexist 
     case $rubyverexist in 
      [Yy]*) rvmexec use; break;; 
      [Nn]*) rvmexec install; break;; 
      *) echo -e "\nERROR: Please enter a valid response\n";; 
     esac 
    done 

任何幫助，將不勝感激，請原諒我提前如果我留下什麼東西出來的關鍵，這是上午01時13分和下班6點:)

乾杯！

Answer 1

好了，一套新的眼睛和谷歌搜索後，它變成了所有我所要做的就是與source前言VAR（也就是現在的別名），然後腳本的行爲與預期：

From ~/.profile: 
alias crver="source $HOME/workspace/crver.sh" 

--- Output Begins --- 

gabrial@thinkpad ~ $ rvm list 

rvm rubies 

    ruby-2.2.1 [ x86_64 ] 
=* ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

gabrial@thinkpad ~ $ crver 

rvm rubies 

    ruby-2.2.1 [ x86_64 ] 
=* ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

Is the version of Ruby you wish to use listed above? (Y/N) y 
Enter the Ruby version to use (ex: 2.2.2), followed by [ENTER]: 2.2.1 
Using /home/gabrial/.rvm/gems/ruby-2.2.1 
gabrial@thinkpad ~ $ rvm list 

rvm rubies 

=* ruby-2.2.1 [ x86_64 ] 
    ruby-2.2.2 [ x86_64 ] 

# => - current 
# =* - current && default 
# * - default 

耶！

〜翅