author | Paul Crowley <paul@lshift.net> |
Wed, 14 Oct 2009 17:13:47 +0100 (2009-10-14) | |
changeset 134 | 525976d2827c |
parent 112 | 3035990989ee |
permissions | -rw-r--r-- |
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
1 |
FILE CONDITIONS |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
2 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
3 |
Read configuring-access before you read this. |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
4 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
5 |
mercurial-server supports file and branch conditions, which restrict an |
112 | 6 |
operation depending on what files it modifies and what branch the work is |
7 |
on. However, the way these conditions work is subtle and can be |
|
8 |
counterintuitive - if you want to keep things simple, stick to user and |
|
9 |
repo conditions, and then things are likely to work the way you would |
|
10 |
expect. |
|
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
11 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
12 |
File and branch conditions are added to the conditions against which a rule |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
13 |
matches, just like user and repo conditions; they have this form: |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
14 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
15 |
file=<globpattern> - file in the repo |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
16 |
branch=<globpattern> - name of the branch |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
17 |
|
112 | 18 |
However, in order to understand what effect adding these conditions will |
19 |
have, it helps to understand how and when these rules are applied. |
|
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
20 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
21 |
The rules file is used to make four decisions: |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
22 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
23 |
- Whether to allow a repository to be created |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
24 |
- Whether to allow access to a repository |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
25 |
- Whether to allow a changeset on a particular branch at all |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
26 |
- Whether to allow a changeset to change a particular file |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
27 |
|
112 | 28 |
When the first two of these decisions are being made, nothing is known |
29 |
about what files might be changed, and so all file conditions automatically |
|
30 |
succeed for the purpose of such decisions. This means that doing tricky |
|
31 |
things with file conditions can have counterintuitive consequences: |
|
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
32 |
|
112 | 33 |
- You cannot limit read access to a subset of a repository with a "read" |
34 |
rule and a file condition: any user who has access to a repository can read |
|
35 |
all of it and its full history. Such a rule can only have the effect of |
|
36 |
masking a later "write" rule, as in this example: |
|
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
37 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
38 |
read repo=specialrepo file=dontwritethis |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
39 |
write repo=specialrepo |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
40 |
|
112 | 41 |
allows all users to read specialrepo, and to write to all files *except* |
42 |
that any changeset which writes to "dontwritethis" will be rejected. |
|
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
43 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
44 |
- For similar reasons, don't give "init" rules file conditions. |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
45 |
|
112 | 46 |
- Don't try to deny write access to a particular file on a particular |
47 |
branch - a developer can write to the file on another branch and then merge |
|
48 |
it in. Either deny all writes to the branch from that user, or allow them |
|
49 |
to write to all the files they can write to on any branch. In other words, |
|
50 |
something like this will have the intended effect: |
|
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
51 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
52 |
write user=docs/* branch=docs file=docs/* |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
53 |
|
112 | 54 |
But something like this will not have the intended effect; it will |
55 |
effectively allow these users to write to any file on any branch, by |
|
56 |
writing it to "docs" first: |
|
83
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
57 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
58 |
write user=docs/* branch=docs |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
59 |
write user=docs/* file=docs/* |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
60 |
read user=docs/* |
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
61 |
|
86ec1268d306
Move some docs out of the README to make it less daunting
Paul Crowley <paul@lshift.net>
parents:
diff
changeset
|
62 |