Force directory recompile

Force directory recompile

[Tim Johnson]

Using GNU Emacs 27.1 on ubuntu 20.04
with the following code:

emacs --batch --eval '(byte-recompile-directory "~/.emacs.d")'

fails to recompile anything.

Since I am moving to a new machine with a different emacs version
I anticipate that it is important to recompile all packages I.E. *.el files.

please advise
thanks

-- 
Tim
tj49.com

Re: Force directory recompile

[Joost Kremers]

On Thu, Mar 18 2021, Tim Johnson wrote:
> Using GNU Emacs 27.1 on ubuntu 20.04
> with the following code:
>
> emacs --batch --eval '(byte-recompile-directory "~/.emacs.d")'
>
> fails to recompile anything.
>

As mentioned in the documentation for `byte-recompile-directory`, it only
recompiles `.el` files if a) there is a corresponding `.elc` file and b) that
`.elc` file is older than the `.el` file. I assume either or both conditions
aren't met. If the second condition is met, simply using `touch` on the source
files should do the trick.

> Since I am moving to a new machine with a different emacs version
> I anticipate that it is important to recompile all packages I.E. *.el files.

If you use `package.el`, you should be able to reinstall all your packages using
`package-install-selected-packages`.

-- 
Joost Kremers
Life has its moments

Re: Force directory recompile

[Tim Johnson]

On 3/18/21 11:29 AM, Joost Kremers wrote:
> On Thu, Mar 18 2021, Tim Johnson wrote:
>> Using GNU Emacs 27.1 on ubuntu 20.04
>> with the following code:
>>
>> emacs --batch --eval '(byte-recompile-directory "~/.emacs.d")'
>>
>> fails to recompile anything.
>>
> As mentioned in the documentation for `byte-recompile-directory`, it only
> recompiles `.el` files if a) there is a corresponding `.elc` file and b) that
> `.elc` file is older than the `.el` file. I assume either or both conditions
> aren't met. If the second condition is met, simply using `touch` on the source
> files should do the trick.
>
>> Since I am moving to a new machine with a different emacs version
>> I anticipate that it is important to recompile all packages I.E. *.el files.
> If you use `package.el`, you should be able to reinstall all your packages using
> `package-install-selected-packages`.
>
Thanks Joost, when I OP'd I was having a problem with documentation. Now 
that
I can read docs the code I was looking for is

emacs --batch --eval '(byte-recompile-directory "~/.emacs.d" 0 t)'

which applies the force option.
cheers

-- 
Tim (always-a-noob t)
tj49.com

RE: [External] : Force directory recompile

[Drew Adams]

> Since I am moving to a new machine with a different emacs version
> I anticipate that it is important to recompile all packages I.E. *.el files.

No, I don't think so.  Emacs Lisp byte code works across platforms.
Your *.elc should work wherever you try them.

Re: [External] : Force directory recompile

[Tim Johnson]

On 3/18/21 12:36 PM, Drew Adams wrote:
>> Since I am moving to a new machine with a different emacs version
>> I anticipate that it is important to recompile all packages I.E. *.el files.
> No, I don't think so.  Emacs Lisp byte code works across platforms.
> Your *.elc should work wherever you try them.
Thanks Drew, to be clear, I was concerned about differences in the version,
not the platform. I am moving from version 26.3 and a custom compile to
a ubuntu-installed 27.1

Anyway, adding the additional two arguments did the trick in less than a 
minute.

regards

-- 
Tim
tj49.com

RE: [External] : Force directory recompile

[Drew Adams]

> >> Since I am moving to a new machine with a different emacs version
> >> I anticipate that it is important to recompile all packages I.E. *.el
> files.
> > No, I don't think so.  Emacs Lisp byte code works across platforms.
> > Your *.elc should work wherever you try them.
>
> Thanks Drew, to be clear, I was concerned about differences in the version,
> not the platform. I am moving from version 26.3 and a custom compile to
> a ubuntu-installed 27.1
> 
> Anyway, adding the additional two arguments did the trick in less than a
> minute.

Sorry, I misread - skipped "with a different emacs version."

(That said, *.elc is often forward-compatible.  But yes, it
makes sense to compile in the same version.)