wrouesnel-pbuilder

This is my bundle of setup scripts to make using pbuilder on Ubuntu a sane and comprehensible experience for modifying and patching your own system.

The goal here is that everything stays semi-associated to your home directory. A non-goal at the moment is removing the sudo root dependency, since that's hard.

A very specific goal is to support incremental builds - i.e. when you upgrade a package with library dependencies, each build can depend on the next while being installed on your system.

This approach is definitely not intended for hermetic or reproducible builds - the goal here is to hack packages on your system in a way which leaves you the ability to rollback by installing older versions.

I have found this system works well for me.

Usage

Run ./setup-pbuilder-repo in the root of the repository.

This will do a few things: generate a new GPG key as your trusted pbuilder key, and setup the basic repository structure in your $HOME/.cache and $HOME/pbuilder folders.

It will then also ask for sudo permissions and create /etc/apt/sources.list.d/pbuilder.list to make your built packages visible to both pbuilder and your system.

Errata

There is a bug in debootstrap with the handing of AptProxyCommand directives - for apt this directive should return DIRECT when no proxy is needed. debootstrap however simply executes the command and shoves the output into http_proxy= - which means when you have no proxy it breaks.

The following patch will fix it:

--- <unnamed>
+++ <unnamed>
@@ -462,7 +462,10 @@
         eval "$(apt-config shell AUTOPROXY Acquire::http::ProxyAutoDetect)"
     fi
     if [ -z "${http_proxy+x}" ] && [ -x "$AUTOPROXY" ]; then
-        http_proxy="$($AUTOPROXY)"
+        autoproxy_result="$($AUTOPROXY)"
+        if [ "$autoproxy_result" != "DIRECT" ] && [ "$autoproxy_result" != "direct" ]; then
+            http_proxy="$($AUTOPROXY)"
+        fi
         if [ -n "$http_proxy" ]; then
             info AUTOPROXY "Using auto-detected proxy: $http_proxy"
             export http_proxy