Genlop

genlop is a portage utility for extracting information about emerged ebuilds from portage log files.

Detailed features include:
 * Nice colorful output.
 * Full Portage merge and unmerge history.
 * Display date, time and build time of every merge.
 * Display total and average build time of selected ebuilds.
 * Estimate upgrade time.
 * Watching current merge progress.
 * Use alternate portage logfile(s).
 * Compressed logfiles (gzip, bzip2) are supported
 * Match ebuild names using regular expressions.
 * Log corruption detection.
 * Display build specific USE and CFLAGS variables.
 * GMT/UTC or localized time and date.
 * Full portage rsync history.

Usage
See the manpage for options and usage examples.