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add readme and sbuild patch

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josch 2014-06-05 14:25:46 +02:00
parent 64a4b761a0
commit 637aa89de1
2 changed files with 112 additions and 0 deletions
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88
0001-add-pre-realbuild-commands-and-post-realbuild-comman.patch Normal file
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@ -0,0 +1,88 @@
From df094f79a67c0835b0fddd73019b09951ed26987 Mon Sep 17 00:00:00 2001
From: josch <j.schauer@email.de>
Date: Wed, 4 Jun 2014 22:57:36 +0200
Subject: [PATCH] add pre-realbuild-commands and post-realbuild-commands
---
lib/Sbuild/Build.pm | 15 +++++++++++++++
lib/Sbuild/Conf.pm | 2 ++
lib/Sbuild/Options.pm | 10 ++++++++++
3 files changed, 27 insertions(+)
diff --git a/lib/Sbuild/Build.pm b/lib/Sbuild/Build.pm
index a24b575..c8552de 100644
--- a/lib/Sbuild/Build.pm
+++ b/lib/Sbuild/Build.pm
@@ -1060,6 +1060,12 @@ sub run_external_commands {
} elsif ($stage eq "chroot-setup-commands") {
$self->log_subsection("Chroot Setup Commands");
$chroot = 1;
+ } elsif ($stage eq "pre-realbuild-commands") {
+ $self->log_subsection("Pre RealBuild Commands");
+ $chroot = 1;
+ } elsif ($stage eq "post-realbuild-commands") {
+ $self->log_subsection("Post RealBuild Commands");
+ $chroot = 1;
} elsif ($stage eq "chroot-cleanup-commands") {
$self->log_subsection("Chroot Cleanup Commands");
$chroot = 1;
@@ -1383,6 +1389,10 @@ sub build {
return 0;
}
+ $self->run_external_commands("pre-realbuild-commands",
+ $self->get_conf('LOG_EXTERNAL_COMMAND_OUTPUT'),
+ $self->get_conf('LOG_EXTERNAL_COMMAND_ERROR'));
+
$self->set('Build Start Time', time);
$self->set('Build End Time', $self->get('Build Start Time'));
@@ -1564,6 +1574,11 @@ sub build {
$self->log_sep();
$self->log("Build finished at $finish_date\n");
+
+ $self->run_external_commands("post-realbuild-commands",
+ $self->get_conf('LOG_EXTERNAL_COMMAND_OUTPUT'),
+ $self->get_conf('LOG_EXTERNAL_COMMAND_ERROR'));
+
my @space_files = ("$dscdir");
$self->log_subsubsection("Finished");
diff --git a/lib/Sbuild/Conf.pm b/lib/Sbuild/Conf.pm
index 25ec66d..a396821 100644
--- a/lib/Sbuild/Conf.pm
+++ b/lib/Sbuild/Conf.pm
@@ -975,6 +975,8 @@ sub setup ($) {
DEFAULT => {
"pre-build-commands" => [],
"chroot-setup-commands" => [],
+ "pre-realbuild-commands" => [],
+ "post-realbuild-commands" => [],
"chroot-cleanup-commands" => [],
"post-build-commands" => [],
},
diff --git a/lib/Sbuild/Options.pm b/lib/Sbuild/Options.pm
index 4a232bf..fbca939 100644
--- a/lib/Sbuild/Options.pm
+++ b/lib/Sbuild/Options.pm
@@ -267,6 +267,16 @@ sub set_options {
push(@{${$self->get_conf('EXTERNAL_COMMANDS')}{"chroot-setup-commands"}},
\@command);
},
+ "pre-realbuild-commands=s" => sub {
+ my @command = split(/\s+/, $_[1]);
+ push(@{${$self->get_conf('EXTERNAL_COMMANDS')}{"pre-realbuild-commands"}},
+ \@command);
+ },
+ "post-realbuild-commands=s" => sub {
+ my @command = split(/\s+/, $_[1]);
+ push(@{${$self->get_conf('EXTERNAL_COMMANDS')}{"post-realbuild-commands"}},
+ \@command);
+ },
"chroot-cleanup-commands=s" => sub {
my @command = split(/\s+/, $_[1]);
push(@{${$self->get_conf('EXTERNAL_COMMANDS')}{"chroot-cleanup-commands"}},
--
1.9.2

24
README.md Normal file
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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`.
Run it like follows. In one terminal execute:
$ ./findunusedbd.sh
In another run sbuild like this:
$ sbuild \
--chroot-setup-commands='/home/user/path/to/findunusedbd.sh chroot-setup' \
--pre-realbuild-commands='/home/user/path/to/findunusedbd.sh pre-realbuild' \
--post-realbuild-commands='/home/user/path/to/findunusedbd.sh post-realbuild'
This needs the --pre-realbuild-commands and --post-realbuild-commands to exist
which can be added to sbuild by applying
`0001-add-pre-realbuild-commands-and-post-realbuild-comman.patch` to it.
Any unused dependencies can then be found by investigating the file
`unneededdepends.list`.
Bugs: when investigating which build dependencies are unused, virtual packages
are not taken into account.