[gentoo-dev] Re: Preserving mtimes for EAPI3

2009-03-31 Thread ABCD 
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Timothy Redaelli wrote:
 On Tuesday 31 March 2009 00:59:57 Ulrich Mueller wrote:
 cut
 [1] For find -newermt we will need =findutils-4.3.3 which shouldn't
 be a problem because 4.3.4 went stable in May 2007.
 
 No, BSD find does not support it and we don't want to use findutils.
 Neither busybox find supports it.
 Make it POSIX[1] please.
 
 [1] http://www.opengroup.org/onlinepubs/009695399/utilities/find.html
 

Here is a solution that should work with find(1p) and touch(1p):
Immediately preceding pkg_setup, `touch
${PORTAGE_BUILDDIR}/.pre_pkg_setup`; immediately following src_install,
`touch ${PORTAGE_BUILDDIR}/.post_src_install`.

Then, the following call to find(1p) should work:

   find ${D} -type f \
 \( \! -newer ${PORTAGE_BUILDDIR}/.pre_pkg_setup -exec \
 touch -c -r ${PORTAGE_BUILDDIR}/.pre_pkg_setup {} + \
-o -newer ${PORTAGE_BUILDDIR}/.post_src_install -exec \
 touch -c -r ${PORTAGE_BUILDDIR}/.post_src_install {} + \)

- --
ABCD
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[gentoo-dev] Re: Preserving mtimes for EAPI3

2009-03-31 Thread Ulrich Mueller 
 On Tue, 31 Mar 2009, ABCD  wrote:

 Here is a solution that should work with find(1p) and touch(1p):
 Immediately preceding pkg_setup,
 `touch ${PORTAGE_BUILDDIR}/.pre_pkg_setup`;
 immediately following src_install,
 `touch ${PORTAGE_BUILDDIR}/.post_src_install`.

 Then, the following call to find(1p) should work:

find ${D} -type f \
  \( \! -newer ${PORTAGE_BUILDDIR}/.pre_pkg_setup -exec \
  touch -c -r ${PORTAGE_BUILDDIR}/.pre_pkg_setup {} + \
 -o -newer ${PORTAGE_BUILDDIR}/.post_src_install -exec \
  touch -c -r ${PORTAGE_BUILDDIR}/.post_src_install {} + \)

Tested and works well. Seems we cannot do without auxiliary files,
since POSIX find doesn't support any reasonable time input format.

Ulrich

[gentoo-dev] Re: Preserving mtimes for EAPI3

2009-03-30 Thread ABCD 
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Ulrich Mueller wrote:
 But as far as I can see, something along the lines of the following
 two commands [1] should be all that is needed:
 
 find ${D} -type f \( -newermt @${stamp1} -o -print0 \) \
 | ${XARGS} -0 touch -c -d @${stamp1}
 
 find ${D} -type f -newermt @${stamp2} -print0 \
 | ${XARGS} -0 touch -c -d @${stamp2}
 
 Variables stamp1 and stamp2 would be assigned from $(date -u +%s)
 before pkg_setup and after src_install, respectively.
 
 The second find command is sort of redundant, since it shouldn't
 happen that ${D} contains files with timestamps from the future.
 Maybe it's better to emit a warning in this case.
 
 Ulrich
 
 [1] For find -newermt we will need =findutils-4.3.3 which shouldn't
 be a problem because 4.3.4 went stable in May 2007.


Personally, I would use

find ${D} -type f \! -newermt @${stamp1} -exec \
touch -c -d @${stamp1} {} +

and

find ${D} -type f -newermt @${stamp2} -exec \
touch -c -d @${stamp2} {} +

to avoid an unneeded call to xargs.

Just my USD0.02,
- --
ABCD
(and the bikeshed shall be BLUE)
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[gentoo-dev] Re: Preserving mtimes for EAPI3

2009-03-30 Thread Ulrich Mueller 
 On Mon, 30 Mar 2009, ABCD  wrote:

 Personally, I would use

 find ${D} -type f \! -newermt @${stamp1} -exec \
 touch -c -d @${stamp1} {} +

 and

 find ${D} -type f -newermt @${stamp2} -exec \
 touch -c -d @${stamp2} {} +

 to avoid an unneeded call to xargs.

Right. And it can be done in one command:

   find ${D} -type f \
 \( \! -newermt @${stamp1} -exec touch -c -d @${stamp1} {} + \
-o -newermt @${stamp2} -exec touch -c -d @${stamp2} {} + \)

Ulrich

[gentoo-dev] Re: preserving mtimes

2008-05-10 Thread Steve Long 
Zac Medico wrote:
 It's currently possible for ebuilds to call the insopts, diropts,
 exeopts, and libopts functions to modify these variables. If they
 add the -p option, then timestamps will be preserved. I suppose we
 can add -p to the default options if that's what everybody wants.
 
Gets my vote (or new-fangled backport from pkgcore if it's more efficient.)

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