[[!meta title="Revision Control Systems"]] Ikiwiki supports using several revision control systems for storing page histories. Ikiwiki started out supporting only [[Subversion|svn]], but the interface ikiwiki uses to a revision control system is sufficiently simple and generic that it can be adapted to work with many systems by writing a [[plugin|plugins/write]]. These days, most people use [[git]]. While all supported revision control systems work well enough for basic use, some advanced or special features are not supported in all of them. The table below summarises this for each revision control system and links to more information about each. [[!table data=""" feature |[[git]]|[[svn]]|[[bzr]] |[[monotone]]|[[mercurial]]|[[darcs]]|[[tla]] |[[cvs]] [[ikiwiki-makerepo]]|yes |yes |yes |yes |yes |yes |no |yes auto.setup |yes |yes |incomplete|yes |incomplete |yes |incomplete|yes `rcs_commit_staged` |yes |yes |yes |yes |yes |yes |no |yes `rcs_rename` |yes |yes |yes |yes |yes |yes |no |yes `rcs_remove` |yes |yes |yes |yes |yes |yes |no |yes `rcs_diff` |yes |yes |yes |yes |yes |yes |yes |yes `rcs_getctime` |fast |slow |slow |slow |fast |slow |slow |slow `rcs_getmtime` |fast |slow |slow |slow |fast |no |no |no `rcs_preprevert` |yes |no |no |no |no |no |no |no `rcs_revert` |yes |no |no |no |no |no |no |no anonymous push |yes |no |no |no |no |no |no |no conflict handling |yes |yes |yes |buggy |yes |yes |yes |yes openid username |yes |no |no |no |yes |yes |no |no """]] Notes: * Lack of support in [[ikiwiki-makerepo]] or auto.setup can make it harder to set up a wiki using that revision control system. * The `rcs_commit_staged` hook is needed to use [[attachments|plugins/attachment]] or [[plugins/comments]]. * `rcs_getctime` and `rcs_getmtime` may be implemented in a fast way (ie, one log lookup for all files), or very slowly (one lookup per file). * Openid username support allows avoiding display of Google's ugly openids. There is a page with [[details]] about how the different systems work with ikiwiki, for the curious.