From 1d1562f20e40785989012818eb6443fe9331713e Mon Sep 17 00:00:00 2001 From: josch Date: Wed, 18 Jun 2014 07:13:55 +0200 Subject: [PATCH] expand README --- README.md | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 0ebfe67..e4d0f87 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,6 @@ +Standalone +---------- + Use `fatrace` to record all file access during an `sbuild` run and find those build dependencies which have their files never needed. You need superuser privileges to run this script because of `fatrace`. @@ -20,6 +23,9 @@ which can be added to sbuild by applying Any unused dependencies can then be found by investigating the file `unneededdepends.list`. +Batch +----- + The process can be automated for multiple packages by passing `dsc` files to `run.sh`: @@ -34,14 +40,34 @@ stored in `*.unusedbd.real` files for each `dsc` file in the current directory. The `run.sh` script expects to find `findunusedbd.sh` directly under `/home`. Best try this out in a chroot to not mess with the host system. -Customize the schroot: +Schroot setup +------------- + +Create the schroot: + + $ sudo sbuild-createchroot --make-sbuild-tarball=/var/lib/sbuild/sid-amd64.tar.gz sid `mktemp -d` http://127.0.0.1:3142/snapshot.debian.org/archive/debian/20140601T000000Z + +Enter the schroot: $ sbuild-shell source:sid-amd64-sbuild + +Make apt ignore the `Valid-Until` header: + $ echo 'Acquire::Check-Valid-Until "false";' > /etc/apt/apt.conf.d/80-nocheckvaliduntil + +Install `equivs`: + $ apt-get install equivs --no-install-recommends +Bugs +---- -Bugs: - when investigating which build dependencies are unused, virtual packages are not taken into account - maybe the fake equivs package can be built outside the schroot to avoid the additional dependencies for installing equivs - maybe equivs can be avoided altogether by finding a way to edit debian/control on the fly + +License +------- + +Consider everything in this repository in the public domain. It is a gross hack +and I do not care what you do with it.