Category Archives: Code - Page 2

Recipes for using SVN library in PHP

The SVN library in PHP allows to work with SVN through a working copy or directly to the SVN repository files:

The problem is there is really few documentation for the direct access functions to repository (svn_repos_* and svn_fs_*) the code is almost the same to working in C the libsvn, but also there are few documentation, most of the svn command.

The good is that is really easy to work with SVN, basically you only need to:

  1. call to svn_repos_open($path) for getting a $repo handler
  2. call to svn_repos_fs($repo) to get a $repo_fs handler
  3. get the latest revision through:  svn_fs_youngest_rev($repo_fs);
  4. Get a $transaction through svn_repos_fs_begin_txn_for_commit($repo, $latest_revision, $commiter, $log_message);
  5. Get a $repo_root resource with svn_fs_txn_root($repo_txn);
    With $repo_root will be the most of operations and the $repo_txn will just work for do a commit or abort
  6. do all the operations (create a file/dir, remove, set contents)
  7. Call to svn_repos_fs_commit_txn($repo_txn); if you want to commit, or svn_fs_abort_txn ( $repo_txn ); if you want to abort the transaction

If you read the part of API for SVN: you will see an example for creating a new dir; this code can be easily changed to PHP since the calls are almost the same (replace  svn_repos_fs_begin_txn_for_commit2 for svn_repos_fs_begin_txn_for_commit) I will show you a script for init the repository creating the common paths (branches, tags, trunk) into an empty repository:

//the path to your repository
$svn_path = "/var/lib/svn/repos/testrepo";

//open the repo
$svn_repo = svn_repos_open($svn_path);

//get a fs handler
$repo_fs = svn_repos_fs($svn_repo);

//get latest revision
$latest_revision = svn_fs_youngest_rev($repo_fs);

//generate a transaction, with user and log message
$repo_txn = svn_repos_fs_begin_txn_for_commit($svn_repo, $latest_revision, 'user-repo-label', 'Creating paths');

//get the root respource to this transaction
$repo_root = svn_fs_txn_root($repo_txn);

//create the dirs
svn_fs_make_dir($repo_root, "trunk");
svn_fs_make_dir($repo_root, "tags");
svn_fs_make_dir($repo_root, "branches");

//finally commit the transaction

This script is called: create-repository-paths.php

You will see at end the list of scripts, the order to use is: (with svn commands in the console to check if worked):

#create SVN repository
danguer@rukia:~$ svnadmin create /var/lib/svn/repos/testrepo
#checking is empty
danguer@rukia:~$ svn ls file:///var/lib/svn/repos/testrepo

#create paths
danguer@rukia:~$ php create-repository-paths.php
danguer@rukia:~$ svn ls file:///var/lib/svn/repos/testrepo

#creating dirs
danguer@rukia:~$ php create-dirs-recursive.php
danguer@rukia:~$ svn ls file:///var/lib/svn/repos/testrepo/test
danguer@rukia:~$ svn ls file:///var/lib/svn/repos/testrepo/test/subdir1
danguer@rukia:~$ svn ls file:///var/lib/svn/repos/testrepo/test/subdir1/subdir2
danguer@rukia:~$ svn ls file:///var/lib/svn/repos/testrepo/test/subdir1/subdir2/subdir3

#create a new file
danguer@rukia:~$ php write-contents.php
danguer@rukia:~$ svn ls file:///var/lib/svn/repos/testrepo/test/myfile.txt
danguer@rukia:~$ svn cat file:///var/lib/svn/repos/testrepo/test/myfile.txt
Lorem Ipsum, file generated with svn

#remove file
danguer@rukia:~$ php remove-object.php
danguer@rukia:~$ svn cat file:///var/lib/svn/repos/testrepo/test/myfile.txt
svn: File not found: revision 4, path '/test/myfile.txt'



Flex 4: Getting bitmap data on a spark clipped content

Recently I was working on a project where I need to get the bitmap data from a container which had a scroller. From Flex 3 I tried to simply get the content directly from container; but I noticed that I only got the exact image of the scroller (Viewport) instead the full content.

With some playing, I got to the same easy solution; to draw the entire content of the container is to simply disable the clipAndEnableScrolling property over the container I was going to fetch the bitmap data and after drawing, enable again; as internally it just adjust the view properties, you won’t notice the change.

Here is the snippet:

this.containerDraw.clipAndEnableScrolling = false;
this.containerDraw.clipAndEnableScrolling = true;

Where bmSave it’s a BitmapData, you can see an example here: