Script to compare files

Uncomment export command to run as external user: not context, pass-fail. File data1 and data2 differ at lines 3, 3: I need to wash the dog. File data1 and data2 differ at lines 4, 4: I need to get the car detailed. Best wishes And what do the comments mean at the top? Head displays the input. It does not play apart in the differencing. As with some other items "context" is local to show the environment context.

By including that, we don't have to discuss whether versions of OSs and utilitiies differ. There was an export missing, thanks for noticing that. I still don't understand the comment. What's an "external user", and why would you want to set the path for a script that is pure bash?

We write code for our shop, so the path settings may differ for external users. We add that if it appears necessary to omit our settings. This is a template that is modified to display the information about the environment in which the code was executed. If it would be transformed into a production code, say for clients, instead of a demo code, we'd want to be sure that none of our local paths are used.

The command line for context is designed so that if that file is not found nothing will happen, not even an error, but no versions would be listed.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. How do I compare two files with a shell script? Ask Question. Asked 10 years, 11 months ago. Active 4 years, 2 months ago. Viewed 83k times. For example : file1 : Hi! Improve this question. Add a comment. Active Oldest Votes.

Improve this answer. Ignacio Vazquez-Abrams Ignacio Vazquez-Abrams k 8 8 gold badges silver badges bronze badges. What if the file is a csv file. Is it possible to find which lines differ? Remove --brief and add format options, e. Doug Harris Doug Harris You can just do if diff Richard Richard 5, 8 8 gold badges 38 38 silver badges 65 65 bronze badges. Wouldn't the "files are different" case go first? The if test asks if something is true, ie, a nonzero return code.

Microsoft Scripting Guy, Ed Wilson, is here. I looked at the script you supplied, where you use Compare-Object to compare two files. Here is your script:. So JW, this is a very simple test case. What is really going on when using Compare-Object?

To do this, I highlight the Compare-Object statement and press F-8 to execute only that portion of the code. This is shown here:. InputObject SideIndicator. This triggers the ELSE portion of the code. Although this works, it can be a bit slow, and on more complex files, I would think it would also be a bit unreliable. Your revised script is shown here:. Now, when I look at the portion of the code that executes, I can see that I am dealing with a Boolean, instead of trying to evaluate whether output which is basically ignored appears or not as in your previous script.

In addition, the Get-FileHash code is rather efficient because Windows PowerShell is pretty fast when it comes to getting the file hash.