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1) In Linux, execve(2) does not split shebang arguments, which implies
that effectively only one argument can be passed to the interpreter.
However, some interpreters, esp. perl, can do a magic here, which is
to split its arguments.
2) Neither /usr/bin/env can split arguments, and no magic is possible
at all.
3) Interpreter path (or name) must not end with <CR>, otherwise execve
(resp. /usr/bin/env) is deemed to fail. However, some interpreters,
esp. perl, can strip trailing <CR> in its command line options.
This should affect dependencies only when no contents_index_bin is available.
After "APT-freindly" logic was introduced, host-system lookup always yields
file paths, but we want package names (except for alternatives etc.).
(old behaviour)
$ sh -c '. /usr/lib/rpm/find-package; FindPackage script perl'
/usr/bin/perl
$
(new behaviour)
$ sh -c '. ./scripts/find-package.in; FindPackage script perl'
perl-base
$
Some scripts like lib.req rely on the fact that RPM_BUILD_ROOT
should not end with trailing slashes or something. Other
scripts like find-package explicitly assume that RPM_BUILD_ROOT
can be relocated within filesystem; they use something like
"real_buildroot" variables. The code gets complicated,
fragile, and error-prone.
Therefore, guys, hereby I FORBID non-canonical RPM_BUILD_ROOT path.
Note that RPM_BUILD_ROOT actually does not have to exist.
This is another problem...
$ less alterator-install-common-desktop-0.11-alt1.i586.rpm |grep help
-rwxr-xr-x 1 root root 972 Oct 30 18:38 /usr/share/alterator/help/ru_RU/basesystem.html
-rwxr-xr-x 1 root root 340 Oct 30 18:38 /usr/share/alterator/help/ru_RU/kbd.html
-rwxr-xr-x 1 root root 2233 Oct 30 18:38 /usr/share/alterator/help/ru_RU/license.html
-rwxr-xr-x 1 root root 1280 Oct 30 18:38 /usr/share/alterator/help/ru_RU/lilo.html
-rwxr-xr-x 1 root root 3032 Oct 30 18:38 /usr/share/alterator/help/ru_RU/network.html
-rwxr-xr-x 1 root root 4840 Oct 30 18:38 /usr/share/alterator/help/ru_RU/packages.html
-rwxr-xr-x 1 root root 1928 Oct 30 18:38 /usr/share/alterator/help/ru_RU/root.html
-rwxr-xr-x 1 root root 1387 Oct 30 18:38 /usr/share/alterator/help/ru_RU/time.html
-rwxr-xr-x 1 root root 1223 Oct 30 18:38 /usr/share/alterator/help/ru_RU/user.html
-rwxr-xr-x 1 root root 11024 Oct 30 18:38 /usr/share/alterator/help/ru_RU/vm.html
-rwxr-xr-x 1 root root 1789 Oct 30 18:38 /usr/share/alterator/help/ru_RU/x11.html
lrwxrwxrwx 1 root root 31 Oct 30 18:38 /usr/share/alterator/help/ru_UA -> /usr/share/alterator/help/ru_RU
$
%files ...
%_datadir/alterator/help/ru_RU/*
%_datadir/alterator/help/ru_UA
The package referes ru_RU directory but does not own the directory.
Old behaviour: unmet dependency.
> alterator-icons-lite-0.4.0-alt1 Requires(rpmlib) rpmlib(PayloadFilesHavePrefix) <= 4.0-1
> +alterator-install-common-desktop-0.11-alt1 Requires /usr/share/alterator/help/ru_RU
> alterator-install-common-desktop-0.11-alt1 Requires alterator-autoinstall
New behaviour: though the package does not explicitly own the directory,
it has some files packaged under the directory. Because of this, ru_UA
symlink will not be broken after install. We chose to be forgiving:
symlinks.req: WARNING: /usr/src/tmp/alterator-install2-desktop-buildroot/usr/share/alterator/help/ru_UA: directory /usr/share/alterator/help/ru_RU not owned by the package
