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E.g. if the content index search detected something like
/usr/bin/arpsend -> arpsend
/usr/sbin/arpsend -> vzctl
then we should consult the host system first. There's a good chance
that the right package, either arpsend or vzctl, IS installed, and
other candidate packages are NOT installed. However, if /usr/bin/which
cannot find any candidate, we should reconsult the index again.
There's been a few problems.
1) ~/bin should not be checked.
$ /usr/lib/rpm/shell.req -v /dev/stdin <<<vim
warning: no package provides /home/at/bin/vim
shell.req: /dev/stdin: vim not found (skip)
$
Fortunately /usr/bin/which has --skip-tilde option.
2) Check for /etc/alternatives was missing.
$ PATH=/bin:/usr/bin /usr/lib/rpm/shell.req -v /dev/stdin <<<vim
shell.req: /dev/stdin: vim -> /usr/bin/vim -> vim-X11
vim-console
vim-enhanced (via rpmdb)
vim-X11
vim-console
vim-enhanced
$
This is why FindByName should ultimately call FindByPath.
After this change, it works just fine:
$ scripts/shell.req.in -v /dev/stdin <<<vim
shell.req.in: /dev/stdin: vim -> /usr/bin/vim -> ... (via which)
shell.req.in: /dev/stdin: /usr/bin/vim -> /usr/bin/vim (alternative)
/usr/bin/vim
$
Also enabled /usr/bin/which --all option and added diagnostics
for really ambiguous cases.
Actually if you think about it a few hours or so... you may come to
know that FindByName() should ultimately call FindByPath(). But this
will be the next commit.
Now it works like this:
$ /usr/lib/rpm/shell.req -v /usr/bin/buildreq
shell.req: /usr/bin/buildreq: cat -> /bin/cat -> coreutils (via rpmdb)
shell.req: /usr/bin/buildreq: cmp -> /usr/bin/cmp -> diffutils (via rpmdb)
shell.req: /usr/bin/buildreq: function(Info) not found (skip)
shell.req: /usr/bin/buildreq: function(show_help) not found (skip)
shell.req: /usr/bin/buildreq: function(show_usage) not found (skip)
shell.req: /usr/bin/buildreq: rm -> /bin/rm -> coreutils (via rpmdb)
shell.req: /usr/bin/buildreq: sed -> /bin/sed -> sed (via rpmdb)
coreutils
diffutils
sed
$
It looks like there's a problem with function(Info) here.
Verbosity is a good thing.
