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= InterTrac Links
Trac supports a convenient way to refer to resources of other Trac servers, from within the Wiki markup. An !InterTrac link can be seen as a scoped TracLinks. It is used for referring to a Trac resource located in another Trac environment. A resource can be a wiki page, changeset, ticket or milestone.
== List of Active InterTrac Prefixes
[[InterTrac]]
== Link Syntax
Simply use the name of the other Trac environment as a prefix, followed by a colon, ending with the resource located in the other environment:
{{{
<target_environment>:<TracLinks>
}}}
The other resource is specified using a regular TracLinks, of any flavor.
That target environment name is either the real name of the environment or an alias for it.
The aliases are defined in the `trac.ini` file, see below.
The prefix is case insensitive.
If the InterTrac link is enclosed in square brackets, like `[th:WikiExtrasPlugin]`, the InterTrac prefix is removed in the displayed link like a normal link resolver would be, ie the above would be displayed as `WikiExtrasPlugin`.
For convenience, there is also an alternative short-hand form, where an alias can be used as an immediate prefix for the identifier of a ticket, changeset or report, eg `#T234`, `[T1508]`, `[trac 1508]`.
== Examples
It is necessary to set up a configuration for the InterTrac facility.
This configuration has to be done in the TracIni file, `[intertrac]` section, for example:
{{{#!ini
[intertrac]
# -- Example of setting up an alias:
t = trac
# -- Link to an external Trac:
trac.title = Edgewall's Trac for Trac
trac.url = http://trac.edgewall.org
}}}
The `.url` is mandatory and is used for locating the other Trac.
This can be a relative URL in case that Trac environment is located on the same server.
The `.title` information is used in a tooltip, ie when hovering the cursor over an InterTrac link.
Now, given the above configuration, one could create the following links:
* to this InterTrac page:
* `trac:wiki:InterTrac` trac:wiki:InterTrac
* `t:wiki:InterTrac` t:wiki:InterTrac
* Keys are case insensitive: `T:wiki:InterTrac` T:wiki:InterTrac
* to the ticket #234:
* `trac:ticket:234` trac:ticket:234
* `trac:#234` trac:#234
* `#T234` #T234
* to the changeset [1912]:
* `trac:changeset:1912` trac:changeset:1912
* `[T1912]` [T1912]
* to the log range [3300:3330]:
* `trac:log:@3300:3330` trac:log:@3300:3330
* `[trac 3300:3330]` [trac 3300:3330]
* finally, to link to the start page of a remote trac, simply use its prefix followed by ':', inside an explicit link. Example: `[th: Trac Hacks]` (note that the ''remote'' Trac has to run Trac >= 0.11 for this to work'')
The generic form `intertrac_prefix:module:id` is translated to the corresponding URL `<remote>/module/id`, shorthand links are specific to some modules (e.g. !#T234 is processed by the ticket module) and for the rest (`intertrac_prefix:something`), we rely on the TracSearch#quickjump facility of the remote Trac.
----
See also: TracLinks, InterWiki
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