Batch File For loop over a list of file extensions with exclusions

Question

Say i have the following files in a directory

• /file.js
• /file2.min.js
• /file1.js

how can i write a batch for loop such that all ".js" files are picked up but ".min.js" are not and the output of the .js filename can be changed to append .min.js

eg:

for %%A IN (*.js) DO @echo %%A "->" %%~nA ".min.js"

would ideally produce the following, and note the file2.min.js is not displayed to the left.

• file.js -> file.min.js
• file1.js -> file1.min.js

Thanks for your help.

Answer 1

Just look whether it already contains .min.js:

setlocal enabledelayedexpansion
for %%f in (*.js) do (
  set "N=%%f"
  if "!N:.min.js=!"=="!N!" echo %%f -^> %%~nf.min.js
)

Answer 2

Not that I disagree with @Joey's solution, but I thought it wouldn't hurt if I posted an alternative:

@ECHO OFF
FOR %%f IN (*.js) DO (
  FOR %%g IN ("%%~nf") DO (
    IF NOT "%%~xg" == ".min" ECHO "%%f" -^> "%%~g.min.js"
  )
)