doc/manual/tsort

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00001 
00119     pango-gtkbeta-devel pango-gtkbeta
00120     XFree86             Mesa
00121     compat-glibc        db2
00122     compat-glibc        db1
00123     pam                 initscripts
00124     kernel              initscripts
00125     initscripts         sysklogd
00126     /* 6.2 */
00127     egcs-c++            libstdc++
00128     /* 6.1 */
00129     pilot-link-devel    pilot-link
00130     /* 5.2 */
00131     pam                 pamconfig
00132 \endverbatim
00133 
00134 Why are there new loops? Because tsort is trying to use all of the
00135 dependency relations for ordering, while the previous tsort ignored all
00136 Requires: from added packages.
00137 
00138 Except for the "well known" libtermcap <-> bash loop (which is just wrong),
00139 all of the other dependencies are simply not needed in an upgrade context
00140 to perform package ordering. Please note that all of the known to cause
00141 loop dependencies listed above are, for now, explicitly ignored when
00142 determining package install ordering.
00143 
00144 \subsection tsort_summary Summary
00145 
00146 So what does this all mean? Basically not much, unless you find yourself
00147 trying to specify dependencies amongst a set of packages correctly and
00148 happen to create a dependency loop.
00149 
00150 And, before you start adding the new-fangled syntax to packages, please
00151 remember that rpm will almost certainly be auto-generating fine-grained
00152 dependencies for %post et al scriptlets pretty soon. Truly, rpm needs to
00153 make packaging easier, not provide Yet More Complicated Syntax in spec files.
00154 
00155 With thanks to Ken Estes for doing the implementation in bash2 that makes
00156 it possible to auto-generate scriptlet dependencies, blame me for the long,
00157 slow deployment.
00158 
00159 */

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