can't do a few things in bash that i could in batch.. help?

steve51184 · 02-02-2014, 05:28 PM

recently moved from windows to linux and i have a script to convert from batch to bash

i'm doing ok so far (at least for the commands) but i'm stuck on a few things as i'm so used the whole batch "if THIS then GOTO that" way of doing things

for example what is the bash equivalent of these three things:

1. this one checks the folder 'c:\foobar' for files with the extension of '.foo' and '.bar' and if one is detected goes to ether :foo or :bar and runs the commands

Code:

if exist c:\foobar\*.foo goto foo
if exist c:\foobar\*.bar goto bar
goto EOF
:foo
[commands here]
goto EOF
:bar
[commands here]
goto EOF

2. this will check a variable '%~x4' in this case which is the variable %4 (a full file name with extension) but modified to only show the extension part

Code:

IF /I "%~x4"==".foo" GOTO foo
IF /I "%~x4"==".bar" GOTO bar
goto EOF
:foo
[commands here]
goto EOF
:bar
[commands here]
goto EOF

3. a bit like #2 but for folder names so it looks for the word 'foo' in the %~4 variable (a folder name)

Code:

echo "%~4" | findstr /i "foo" >nul 2>&1 && GOTO foo
echo "%~4" | findstr /i "bar" >nul 2>&1 && GOTO bar
goto EOF
:foo
[commands here]
goto EOF
:bar
[commands here]
goto EOF

would be awesome to know how to do this in bash

unSpawn · 02-02-2014, 05:45 PM

I'll do just the first one and give you some pointers.

Quote:

Originally Posted by steve51184

this one checks the folder 'c:\foobar' for files with the extension of '.foo' and '.bar' and if one is detected goes to ether :foo or :bar and runs the commands

Code:

if exist c:\foobar\*.foo goto foo
if exist c:\foobar\*.bar goto bar
goto EOF
:foo
[commands here]
goto EOF
:bar
[commands here]
goto EOF

Depends on what processing you need. For example this could do anything like converting, copying, moving etc, etc:

Code:

find /some/path/ -type f -iname \*.foo -print0 | xargs -0 -iX doSomething 'X'

same difference:

Code:

foo() { doSomething; }
find /some/path/ -type f -iname \*.foo | while read ITEM; do
 foo "${ITEM}"
done

...same difference:

Code:

find /some/path/ -type f | case ITEM in
 *.foo) doSomething "${ITEM}";;
 *.bar) doSomethingElse "${ITEM}";;
esac