如何更改用戶輸入變量？

Question

這裏是我

echo "Please select an Environment " 

PS3="Please enter 1-6: " 
select env in dev qa test staging production quit 
do 
    case $env in 
     dev|qa|test|staging|production|quit) 
      break 
      ;; 
     *) 
      break 
      ;; 
    esac 
done 

echo $env 

我想，當有人選擇和環境變量我想翻譯它。

例如生產將轉化爲$ ENV =門戶

Answer 1

腳本：你想要什麼

$ ./so_q28397293.sh 
1) dev 
2) qa 
3) test 
4) quit 
Please enter 1-4: 1 
env = Development environment 

$ ./so_q28397293.sh 
1) dev 
2) qa 
3) test 
4) quit 
Please enter 1-4: 5 
invalid option 
Please enter 1-4: 4 
See ya 
$ 

它是：使用的

#!/usr/bin/env bash 

declare -ar OPTIONS=('dev' 'qa' 'test' 'quit') 
PS3="Please enter 1-${#OPTIONS[@]}: " 

select OPTION in "${OPTIONS[@]}" 
do 
    case ${OPTION} in 
     'dev') 
      env='Development environment' 
      break 
      ;; 
     'qa') 
      env='Quality Assurance environment' 
      break 
      ;; 
     'test') 
      env='Test environment' 
      break 
      ;; 
     'quit') 
      echo 'See ya' && exit 0 
      ;; 
     *) echo 'invalid option';; 
    esac 
done 

echo "env = ${env}" 

exit 0 

實例？

---

不要忘記，test是猛砸保留字（這就是爲什麼我引用它）：

$ bash -c "help test" 
test: test [expr] 
    Evaluate conditional expression. 

    Exits with a status of 0 (true) or 1 (false) depending on 
    the evaluation of EXPR. Expressions may be unary or binary. Unary 
    expressions are often used to examine the status of a file. There 
    are string operators and numeric comparison operators as well. 
    ... 

Answer 2

你可以試試：

echo "Please select an Environment " 

echo -n "Please enter 1-6: " 
read ARG 
case $ARG in 
    1) ENV="dev" ;; 
    2) ENV="qa" ;; 
    #etc 
esac 

echo $env