This page is proposed for deletion. See our wiki cleanup plan for more information.
(for a short intro of the basic concepts of Mercurial, see UnderstandingMercurial)
The act of creating a changeset is called a commit or checkin. A changeset includes the actual changes to the files and some meta information. The meta information in a changeset includes:
- the list of changed files
- information about who made the change (the "committer"), why ("comments") and when (date/time, timezone)
the name of the branch ("default", if omitted or not set)
Each changeset has zero, one or two parent changesets. It has two parent changesets, if the commit was a merge. It has no parent, if the changeset is a root in the repository. There may be multiple roots in a repository (normally, there is only one), each representing the start of a branch.
If a changeset is not the head of a branch, it has one or more child changesets (it is then the parent of its child changesets).
"Updating" back to a changeset which already has a child, changing files and then committing creates a new child changeset, thus starting a new branch. Branches can be named.
All changesets of a repository are stored in the changelog.
Here's what the internal representation of a changeset looks like:
$ hg debugdata .hg/00changelog.d 1208 1102691ceab8c8f278edecd80f2e3916090082dd <- the corresponding manifest nodeid firstname.lastname@example.org <- the committer 1126146623 25200 <- the date, in seconds since the epoch, and seconds offset from UTC mercurial/commands.py <- the list of changed files, followed by the commit message Clean up local clone file list We now use an explicit list of files to copy during clone so that we don't copy anything we shouldn't.