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(svn r23659) -Doc: behaviour of file searching in general, and in tars specifically

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rubidium 2011-12-22 19:51:40 +00:00
parent aa06dee034
commit 3f48d127b7
2 changed files with 32 additions and 1 deletions
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6
known-bugs.txt
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@ -407,3 +407,9 @@ Settings not saved when OpenTTD crashes [FS#4846]:
saved, and you need to run a version that crashes regularly, then
you can use the 'saveconfig' command in the console to save the
settings.
Not all NewGRFs, AIs, game scripts are found [FS#4887]:
Under certain situations, where the path for the content within a
tar file is the same as other content on the file system or in another
tar file, it is possible that content is not found. A more thorough
explanation and solutions are described in section 4.4 of readme.txt.

27
readme.txt
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@ -1,5 +1,5 @@
OpenTTD readme
Last updated: 2011-12-05
Last updated: 2011-12-22
Release version: 1.1.4
------------------------------------------------------------------------
@ -15,6 +15,7 @@ Table of contents
* 4.1) (Required) 3rd party files
* 4.2) OpenTTD directories
* 4.3) Portable installations (portable media)
* 4.4) Files in tar (archives)
5.0) OpenTTD features
* 5.1) Logging of potentially dangerous actions
6.0) Configuration file
@ -324,6 +325,30 @@ media to.
As always - additional grf files are stored in the newgrf/ dir (for details,
again, see section 4.1).
4.4) Files in tar (archives)
---- -----------------------
OpenTTD can read files that are in an uncompressed tar (archive), which
makes it easy to bundle files belonging to the same script, NewGRF or base
set. Music sets are the only exception as they cannot be stored in a tar
file due to being played by external applications.
OpenTTD sees each tar archive as the 'root' of its search path. This means
that having a file with the same path in two different tar files means that
one cannot be opened, after all only one file will be found first. This is
done to make it possible to have the large 32bpp zoomed graphics in a separate
file to the (relatively small) unzoomed 8bpp NewGRF. As such it is advisable
to put an uniquely named folder in the root of the tar and put all the
content in that folder. For example, all downloaded content has a path that
concatenates the name of the content and the version, which makes the path
unique. For custom tar files it is advised to do this as well.
The normal files are also referred to by their relative path from the search
directory, this means that also normal files could hide files in a tar as
long as the relative path from the search path of the normal file is the
same as the path in the tar file. Again it is advised to have an unique path
to the normal file so they do not collide with the files from other tar
files.
5.0) OpenTTD features
---- ----------------