66 lines
2.6 KiB
Markdown
66 lines
2.6 KiB
Markdown
# gitosis-lite
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In this document:
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* "lite"?
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* what's extra
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* workflow
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----
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### "lite"?
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I have been gitosis for a while, and have learnt a lot from it. But in a
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typical $DAYJOB setting, there are some issues. It's not always Linux, so you
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can't just "urpmi gitosis" and be done. "python-setuptools" isn't often
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installed (and on a Solaris 9 I was trying to help remotely, we never did
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manage it). And the most requested feature (see next section) had to be
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written anyway.
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While I was pondering having to finally learn python (I hate whitespace based
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flow logic except for plain text; this is a *personal* opinion so pythonistas
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can back off :-), I also realised that:
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* no one in $DAYJOB settings will use or approve access methods that work
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without any authentication, so I didn't need gitweb/daemon support in the
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tool
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* the idea that you admin it by pushing to a special repo is cute and
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convenient, but not really necessary because of how rarely these changes
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are made.
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All of this pointed to a rewrite. In perl, naturally.
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I also gained (and used) an unfair advantage: gits newer than 1.6.2 can clone
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an empty repo, so I don't need complex logic in the permissions checking part
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to *create* the repo initially -- I just create an empty bare repo when I
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"compile" the config file (see "workflow" below).
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### what's extra?
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A lot of people in my $DAYJOB type world want per-branch permissions, so I
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copied the basic idea from
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git.git:Documentation/howto/update-hook-example.txt. I think this is the most
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significant extra I have. This includes not just who can push to what branch,
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but also whether they are allowed to rewind it or not (non-ff push).
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### workflow
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I took the opportunity to change the workflow significantly.
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* all admin happens *on the server*, in a special directory
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* after making any changes, one "compiles" the configuration. This
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refreshes `~/.ssh/authorized_keys`, as well as puts a parsed form of the
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access list in a file for the other two pieces to use.
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Why pre-parse? Because access control decisions are taken at two separate
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stages now:
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* the program that is run via `~/.ssh/authorized_keys` (called
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`gl-auth-command`, equivalent to `gitosis-serve`) decides whether even git
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should be allowed to run (basic R/W/no access)
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* the update-hook on each repo, which decides the per-branch permissions.
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But the user specifies only one access file, and he doesn't have to know these
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distinctions. So I avoid having to parse the access file in two completely
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different programs by pre-compiling it and storing it as a perl "variable".
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