Windows批处理文件-多个条件和行

Question

I need to extract information from a file using BATCH file. I have AWK (GNUWIN32) installed in Windows.

Text File contains -

# FOR Example Purposes  *** #
# Dated on Jan 29, 2014

TEST_tag=branch_release_v_2.0.82.91_YOU_Branch
NONE_tag=branch_release_v_12.0.82.1_ONE_Branch
DOIT_tag=branch_release_v_1.0.9_EXA_Branch

Now, I need the following output from this file (comments removed and string manipulated)-

TEST/branch_release_v_2.0.82.91_YOU_Branch
NONE/branch_release_v_12.0.82.1_ONE_Branch
DOIT/branch_release_v_1.0.9_EXA_Branch

I will prefer if it can be done using variables instead of replacing "_tag=" with "/" so, I can use the logic with other formats as well.

Here what I tried to do.

FOR /F "tokens=*" %%A IN ('awk "!/^($|#)/" test.txt') DO (
ECHO %%A | awk -F_ "{print $1}" > one.tmp
SET /P ONE=<one.tmp

ECHO %%A | awk -F= "{print $2}" > two.tmp
SET /P TWO=<two.tmp

ECHO %ONE%/%TWO%
)

It's not working and is printing the same result (last line only printed 3 times)

DOIT/branch_release_v_1.0.9_EXA_Branch
DOIT/branch_release_v_1.0.9_EXA_Branch
DOIT/branch_release_v_1.0.9_EXA_Branch

Solution (Thanks to Magoo) ---

FOR /F "tokens=*" %%A IN ('awk "!/^($|#)/" test.txt') DO (

setlocal enabledelayedexpansion

ECHO %%A | awk -F_ "{print $1}" > one.tmp
SET /P ONE=<one.tmp

ECHO %%A | awk -F= "{print $2}" > two.tmp
SET /P TWO=<two.tmp

ECHO !ONE!/!TWO!
)

Thanks again.

Answer 1

Within a block statement (a parenthesised series of statements) , the entire block is parsed and then executed. Any %var% within the block will be replaced by that variable's value at the time the block is parsed - before the block is executed.

Hence, IF (something) else (somethingelse) will be executed using the values of %variables% at the time the IF is encountered.

Two common ways to overcome this are 1) to use setlocal enabledelayedexpansion and use !var! in place of %var% to access the changed value of var or 2) to call a subroutine to perform further processing using the changed values.