got: allow 'got log -x' to accept keywords Suggested by Lucas on IRC. ok stsp@ and op@

zap unused got_commit_object var; ok op@

add cancellation support to the mixed-commits checker in worktree.c

plug got_reference leak in cmd_update() ok op@

got: improve reporting accuracy in branch listing output As suggested by stsp, show the out-of-date symbol for the work tree branch if it is not only out of date in relation to the branch tip but also if it contains mixed commits. Update regress and add new test to check for this case. Also, explain the mixed commit condition of * and ~ markers denoting work tree state in got(1) branch -l docs. ok stsp@

use a separate .cvg meta data directory for cvg(1) work trees This prevents mixing the use of got and cvg clients in the same work tree. Avoids confusion going forward while cvg differentiates itself further. tog(1) and gotadmin(1) remain compatible with both work tree formats. These tools only read work trees to locate the corresponding repository.

got: enable more commands to accept commit keywords More work adding commit keyword support to the blame, cat, ref, tag, and tree commands. With this, all Got commands that take a <commit> option argument or operand now support keywords. Regress flub saved by op! fixes + ok op@

expand support for commit keywords to more got commands Add the ability to use keywords in the backout, branch, checkout, cherrypick, and patch commands. Includes some basic regress tests for the new commands, and also some more contrived test cases for 'got log -c[:]keyword[:(+|-)[N]]'. ok stsp

implement support for keywords as got <commit> arguments This begins enabling the use of keywords in got wherever commit ids or references are used, with more work intended to expand support across all such instances (e.g., branch, checkout, etc.), and add more keywords. The keywords ":base" and ":head" can be passed to 'got {diff,log,update} -c' commands as a substitute for the corresponding commit hash id. Keywords and references can also be modified by appending a ':+' or ':-' and an optional integer N to specify by first parent traversal the Nth generation descendant or antecedent, respectively. If N is omitted, a '1' is implicitly appended. tweaks + ok op and stsp

abort histedit if the user quits the editor without saving the script Also document that the commit/import/tag operations are aborted when the user fails to save the log message from the invoked editor. ok jamsek stsp

always report stat() error with path ok stsp

plug got_object_id leak in cmd_log() ok stsp@

fix option processing for 'got merge' Don't make -C imply -c (a break statement was missing). Detect -an and -cn conflicts. Simplify by removing unneeded check for conflicting -aC (since -C requires -c, we can rely on the -ac conflict being detected). Update the man page to say -cC is allowed.

add -M option: tell got merge not to fast-forward ok stsp@

reword user-facing error message which mentions "fast-forward" For user-facing messages it is better to avoid technical jargon like this and instead spell out what the fast-forward situation implies: that one branch is already based on another. ok jamsek