author | Paul Crowley <paul@lshift.net> |
Sat, 07 Mar 2009 09:31:06 +0000 (2009-03-07) | |
changeset 83 | 86ec1268d306 |
child 112 | 3035990989ee |
permissions | -rw-r--r-- |
83
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FILE CONDITIONS |
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Read configuring-access before you read this. |
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mercurial-server supports file and branch conditions, which restrict an |
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operation depending on what files it modifies and what branch the work is on. |
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However, the way these conditions work is subtle and can be counterintuitive - |
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if you want to keep things simple, stick to user and repo conditions, and then |
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things are likely to work the way you would expect. |
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File and branch conditions are added to the conditions against which a rule |
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matches, just like user and repo conditions; they have this form: |
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file=<globpattern> - file in the repo |
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branch=<globpattern> - name of the branch |
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However, in order to understand what effect adding these conditions will have, |
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it helps to understand how and when these rules are applied. |
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The rules file is used to make four decisions: |
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- Whether to allow a repository to be created |
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- Whether to allow access to a repository |
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- Whether to allow a changeset on a particular branch at all |
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- Whether to allow a changeset to change a particular file |
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When the first two of these decisions are being made, nothing is known about |
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what files might be changed, and so all file conditions automatically succeed |
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for the purpose of such decisions. This means that doing tricky things with |
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file conditions can have counterintuitive consequences: |
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- You cannot limit read access to a subset of a repository with a "read" rule |
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and a file condition: any user who has access to a repository can read all of |
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it and its full history. Such a rule can only have the effect of masking a |
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later "write" rule, as in this example: |
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read repo=specialrepo file=dontwritethis |
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write repo=specialrepo |
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allows all users to read specialrepo, and to write to all files *except* that |
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any changeset which writes to "dontwritethis" will be rejected. |
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- For similar reasons, don't give "init" rules file conditions. |
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- Don't try to deny write access to a particular file on a particular branch - |
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a developer can write to the file on another branch and then merge it in. |
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Either deny all writes to the branch from that user, or allow them to write to |
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all the files they can write to on any branch. In other words, something like |
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this will have the intended effect: |
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write user=docs/* branch=docs file=docs/* |
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But something like this will not have the intended effect; it will effectively |
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allow these users to write to any file on any branch, by writing it to "docs" |
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first: |
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write user=docs/* branch=docs |
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write user=docs/* file=docs/* |
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read user=docs/* |
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