+ svn 2 hg article

_posts/2011-12-22-Where-Android-Market-stores-the-downloaded-apk.md

@@ -5,7 +5,7 @@ date: 2011-12-22 07:12:17 +0100
 tags: android apk internals market temporary files
 permalink: articles/where-android-market-stores-downloaded-apk
 ---
-Today I ran into a small problem that might happen sometimes : trying to benefit from a 2 day-only offer to download for free [Duke Nukem 3d](https://market.android.com/details?id=com.machineworksnorthwest.duke3d) (just for fun, I don't think it's going to be the killer app this year), I found out that my phone had not enough free memory to install it (Market told me : 56MB required).
+Today I ran into a small problem that might happen sometimes : trying to benefit from a 2 day-only offer to download for free [Duke Nukem 3d](https://market.android.com/details?id=com.machineworksnorthwest.duke3d) (just for fun, I don't think it's going to be the killer app this year ;-), I found out that my phone had not enough free memory to install it (Market told me : 56MB required).
 
 After having removed several apps from the memory to free enough space to install the game - and after a first failed attempt to download the 28MB archive - I was able to download the _.apk_ from the Market (that was "phase 1 : download").
 

_posts/2012-01-25-Migrating-from-Subversion-to-Mercurial.md

@@ -0,0 +1,107 @@
+---
+layout: post
+title: Migrating from Subversion to Mercurial
+date: 2012-01-25 22:25:10 +0100
+permalink: articles/migrating-subversion-mercurial
+tags: tooling mercurial migration pre-revprop-change subversion svnsync
+---
+> Instructions are aimed at Windows mainly (on Linux it should be easier).
+
+# Need to migrate from Subversion to Mercurial ?
+
+This is a quick guide to migrating an existing _SVN_ repository to a new _Hg_ one.
+
+It takes 2 major steps :
+
+1. make a local copy of the existing SVN repository
+2. convert it to Hg
+
+# Make a local copy of the existing SVN repository
+
+Oddly enough, this was the hardest part to figure out :
+
+## 1. Create a local repository
+
+It will mirror the existing (remote) one. I just used TortoiseSVN on an new, empty directory.
+
+## 2. Initialize this repository
+
+    C:\Users\nicolas\Work>"C:\Program Files\TortoiseSVN\bin\svnsync.exe" init file:///c:/Users/nicolas/Work/ciform-bak https://plugnauth.svn.sourceforge.net/svnroot/plugnauth
+
+On Windows you will need the following `pre-revprop-change.bat` file in the `hooks` subdirectory of your newly created repository :
+
+```bat
+@REM pre-revprop-change.bat
+@ECHO OFF
+
+set user=%3
+
+if /I '%user%'=='syncuser' goto ERROR_REV
+
+exit 0
+
+:ERROR_REV echo "Only the syncuser user may change revision properties" >&2
+exit 1
+```
+[gist.github.com/1679659](https://gist.github.com/1679659)
+
+You may find similar code on the net but :
+
+- the sample that's provided with _TortoiseHg_ (or Tigris' distribution apparently) only contains Linux-ready scripts
+- many samples on the web work fine for common operations but not for the `svnsync` command we are about to use
+
+It looked strange to me that it was not working out of the box on Windows, but I really had to create that script to make it work...
+
+## 3. Start the synchronization
+
+    C:\Users\nicolas\Work>"C:\Program Files\TortoiseSVN\bin\svnsync.exe" sync --username cbonar file:///C:/Users/nicolas/Work/ciform-bak
+    [...]
+    Committed revision 92.
+    Copied properties for revision 92.
+    Transmitting file data .
+    Committed revision 93.
+    Copied properties for revision 93.
+
+We can now work with this local SVN mirror.
+
+
+# Convert the SVN repository to a Hg one
+
+This operation is quite simple...
+
+## 1. Enable ConvertExtension
+
+With a command line client, it should be as easy as making sure you have the following in your `.hgrc` or `mercurial.ini` file :
+
+    [extensions]
+    convert=
+
+With TortoiseHg I just had to enable `convert` in the global settings (I did first on the repo settings only but it didn't work right away so I gave up) :
+
+![ConvertExtension enabled in TortoiseHg](/assets/blog/TortoiseHg-ConvertExtension.png)
+
+## 2. Run the "hg convert" command
+
+It might be the right time to [remap author names](http://mercurial.selenic.com/wiki/ConvertExtension#A--authors)...
+
+    C:\Program Files\TortoiseHg>hg convert file:///c:/Users/nicolas/Work/ciform-bak file:///c:/users/nicolas/Work/ciform-hg
+    initializing destination file:///c:/users/nicolas/Work/ciform-hg repository
+    scanning source...
+    sorting...
+    converting...
+    92 + added trunk directory : main development stream
+    [...]
+    0 + a lot of work on the ant task
+
+Done. **You now have a fully functional Mercurial repository with all changesets from the SVN history !**
+
+
+Successful import from SourceForge's SVN to Google Code's Hg :
+
+![Sample project imported from Sourceforge's SVN to Google code's Hg](/assets/blog/svn2hg-googlecode.png)
+
+# Related links
+
+- Sample `pre-revprop-change` hooks for Windows : [stackoverflow.com/questions/6155/common-types-of-subversion-hooks/9010360#9010360](http://stackoverflow.com/questions/6155/common-types-of-subversion-hooks/9010360#9010360)
+- Official doc for converting from different sources to Hg : [mercurial.selenic.com/wiki/ConvertExtension](http://mercurial.selenic.com/wiki/ConvertExtension)
+- `pre-revprop-change.bat` adapted for Windows from  : [chestofbooks.com/computers/revision-control/subversion-svn/Repository-Replication-Reposadmin-Maint-Replication.html](http://chestofbooks.com/computers/revision-control/subversion-svn/Repository-Replication-Reposadmin-Maint-Replication.html)