Restcloud ETL resolves shell script parameterization

 RestCloud ETL Community Edition is a data integration tool , Provide visual multi data pipeline construction 、 Data source management 、 Operation monitoring and authority management functions .

RestCloud How to transfer variables into the platform shell Use in script , There are two ways to run in the platform shell Script , Namely Script code in component and Call script file , There are different ways to obtain variables according to different operation modes .

1. Script in component

The method of obtaining variables for scripting in components is the same as that for other components , Use ${ Variable id} You can get the variable data . As shown in the figure below ：

Here is a simple process , Input the data of a field in the database table as a variable item by item into shell In the script .

Here is the database data , The name will be used as a variable in the process .

The configuration of the library table input component is skipped , Simply read the output data successfully .

  Output line by line. Here, you need to convert the field data into variable data and output it to the next node .

  Here is shell Script configuration , Write a simple script , Use ${ Variable id} Call the variable data passed in from the previous node .

  After running, you can see that you have successfully passed ${ full name } Get the data output from the database .

2. Call script file

This is the call that has been written shell Script files , The name of the variable is not defined in the script file , Use it directly $ Variable id  This method can successfully call the variables passed in the process . Here's the picture ：

  The above process and database are also used here , Just a little modification shell Script content of the component .

  Because it is a read script file , Here you need to fill in the directory where the script is located . stay shell Run the file in the script and use ${ Variable id} To get variables , Be careful ： If there are multiple variables, you need to pay attention to the order of variables .

  Here, enter the directory where the file is located and use pwd View the current path address .

  Use vim File name   Enter the script file to edit the script code , Here you simply print the first variable and one hello, Use... In documents $1～$n To add a pass to Shell Variable value .$1 It's No 1 Variable 、$2 It's No 2 Variable ….

Configuration complete , View the results after running .

  You can see shell Successfully obtained variable data , Output to the log .

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