How can I perform auto format Cadence Skill, such as indent, align...

First start with a good text editor which can handle indentation and folding correctly.  The issue is that the SKILL dialect of LISP is a not very well known language, so a specific language file for SKILL are rare.

Some time ago I've switched from NP++ to sublime, it makes a big difference in configuring and using it for coding. You can code your SKILL language file in such way that you can even x-ref functions, so jumping to the definition and see where it is used throughout the project. 

Further, if you pp() (pretty print) your function then you will always get a 'default' format. However you will lose all your comments and in most cases the pp() result also makes it less readable.

Assume that you've defined a test() procedure. Just use pp(test) to pretty print this function.  If you pass a port as 2nd variable to pp() then you can print it to an file outport.

Hi Bruekers

Append a further question.Is there anyway I can stream out pp() log to a temp file, then use this temp file to overwrite my 1st ugly-format skill source code?

by doing this, I can automatically refresh my skill code format.

ex:

load(MyPreocedure.il)

pp(MyPreocedure) > TEMP.txt

sh("cp  MyPreocedure.il MyPreocedure.bk.il -f")

sh("mv TEMP.txt  MyPreocedure.il -f")

the phrase

'pp(MyPreocedure) > TEMP.txt'  does not work for now   :(

Hi Bruekers

Append a further question.Is there anyway I can stream out pp() log to a temp file, then use this temp file to overwrite my 1st ugly-format skill source code?

by doing this, I can automatically refresh my skill code format.

ex:

load(MyPreocedure.il)

pp(MyPreocedure) > TEMP.txt

sh("cp  MyPreocedure.il MyPreocedure.bk.il -f")

sh("mv TEMP.txt  MyPreocedure.il -f")

the phrase

'pp(MyPreocedure) > TEMP.txt'  does not work for now   :(

This should work:

load(MyPreocedure.il)
when(p = outfile("./TEMP.txt")
    pp(MyPreocedure p)
    close(p)
)
sh("cp  MyPreocedure.il MyPreocedure.bk.il -f")
sh("mv TEMP.txt  MyPreocedure.il -f")

 pp(MyPreocedure p) stream out the string "MyPreocedure" to port p, instead of the actual procedure name which MyPreocedure point to,

I tried using pp(stringToSymbol(name_procedure) p)

but it still does not work

Thank you again for your kindness reply :)