[RFCv1,3/4] support/scripts: add graph-size script

This new script uses the data collected by the step_pkg_size
instrumentation hook to generate a pie chart of the size contribution
of each package to the target root filesystem. To achieve this, it
looks at each file in $(TARGET_DIR), and using the <pkgname>.filelist
information collected by the step_pkg_size hook, it determines to
which package the file belongs. It is therefore able to give the size
installed by each package.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 support/scripts/graph-size | 164 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 164 insertions(+)
 create mode 100755 support/scripts/graph-size

Thomas, All,

On 2014-06-07 23:46 +0200, Thomas Petazzoni spake thusly:
> This new script uses the data collected by the step_pkg_size
> instrumentation hook to generate a pie chart of the size contribution
> of each package to the target root filesystem. To achieve this, it
> looks at each file in $(TARGET_DIR), and using the <pkgname>.filelist
> information collected by the step_pkg_size hook, it determines to
> which package the file belongs. It is therefore able to give the size
> installed by each package.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Well, I won't really review this Python code, since I can't be said to
be a Python expert! ;-)

However, with my proposal in patch 2/4, that script might need some big
overhaul, so I doubt it would be a usefull review anyway.

Still, with my proposal, we should pass the list file as an argument to
this script. That would allow one to store the list file, and regenerate
the graphs later on.

Regards,
Yann E. MORIN.

> ---
>  support/scripts/graph-size | 164 +++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 164 insertions(+)
>  create mode 100755 support/scripts/graph-size
> 
> diff --git a/support/scripts/graph-size b/support/scripts/graph-size
> new file mode 100755
> index 0000000..5f7fe58
> --- /dev/null
> +++ b/support/scripts/graph-size
> @@ -0,0 +1,164 @@
> +#!/usr/bin/env python
> +
> +# Copyright (C) 2014 by Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> +
> +# This program is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 2 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +# General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write to the Free Software
> +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> +
> +# This script draws a pie chart of the size used by each package in
> +# the target filesystem.
> +
> +import sys
> +import os.path
> +import argparse
> +import matplotlib.font_manager as fm
> +import matplotlib.pyplot as plt
> +
> +colors = ['#e60004', '#009836', '#2e1d86', '#ffed00',
> +          '#0068b5', '#f28e00', '#940084', '#97c000']
> +
> +#
> +# This function parses one .filelist file (which lists the files
> +# installed by a particular package), and returns a Python list of the
> +# file paths installed by the package.
> +#
> +# pkgf: path to the .filelist file
> +#
> +def handle_pkg(pkgf):
> +    files = []
> +    with open(pkgf) as f:
> +        for l in f.readlines():
> +            files.append(l.strip().replace("./", ""))
> +    return files
> +
> +#
> +# This function returns the list of files present in the skeleton,
> +# with the exception of the .empty files. It is used to create a fake
> +# entry in the dictionary of files installed by each package, emulated
> +# the presence of a skeleton package.
> +#
> +def handle_skeleton():
> +    skeleton_files = []
> +    for root, _, files in os.walk("system/skeleton"):
> +        for f in files:
> +            if f == ".empty":
> +                continue
> +            frelpath = os.path.relpath(os.path.join(root, f), "system/skeleton")
> +            skeleton_files.append(frelpath)
> +    return skeleton_files
> +
> +#
> +# This function returns a dict where each key is the name of a
> +# package, and the value is a list of the files installed by this
> +# package.
> +#
> +# builddir: path to the Buildroot output directory
> +#
> +def build_package_dict(builddir):
> +    pkgdict = {}
> +    # Parse all the .filelist files generated by the package
> +    # installation process
> +    filelist = os.listdir(os.path.join(builddir, "build"))
> +    for file in filelist:
> +        (_, ext) = os.path.splitext(file)
> +        if ext != ".filelist":
> +            continue
> +        pkgname = file.replace(".filelist", "")
> +        pkgdict[pkgname] = handle_pkg(os.path.join(builddir, "build", file))
> +    # Add a special fake entry for the files installed by the skeleton
> +    pkgdict['skeleton'] = handle_skeleton()
> +    return pkgdict
> +
> +#
> +# This function looks into the 'pkgdict' dictionary (as generated by
> +# build_package_dict) to see which package has installed the file 'f',
> +# and returns the name of that package.
> +#
> +def find_file(pkgdict, f):
> +    for (p, flist) in pkgdict.iteritems():
> +        if f in flist:
> +            return p
> +    return None
> +
> +#
> +# This function build a dictionary that contains the name of a package
> +# as key, and the size of the files installed by this package as the
> +# value.
> +#
> +def build_package_size(builddir):
> +    pkgdict = build_package_dict(builddir)
> +    pkgsize = {}
> +
> +    for root, _, files in os.walk(os.path.join(builddir, "target")):
> +        for f in files:
> +            fpath = os.path.join(root, f)
> +            if os.path.islink(fpath):
> +                continue
> +            frelpath = os.path.relpath(fpath, os.path.join(builddir, "target"))
> +            pkg = find_file(pkgdict, frelpath)
> +            if pkg is None:
> +                print "WARNING: %s is not part of any package" % frelpath
> +                pkg = "unknown"
> +            if pkg in pkgsize:
> +                pkgsize[pkg] += os.path.getsize(fpath)
> +            else:
> +                pkgsize[pkg] = os.path.getsize(fpath)
> +
> +    return pkgsize
> +
> +#
> +# Given a dict returned by build_package_size(), this function
> +# generates a pie chart of the size installed by each package.
> +#
> +def draw_graph(pkgsize, outputf):
> +    total = 0
> +    for (p, sz) in pkgsize.iteritems():
> +        total += sz
> +    labels = []
> +    values = []
> +    other_value = 0
> +    for (p, sz) in pkgsize.iteritems():
> +        if sz < (total * 0.01):
> +            other_value += sz
> +        else:
> +            labels.append(p)
> +            values.append(sz)
> +    labels.append("Other")
> +    values.append(other_value)
> +
> +    plt.figure()
> +    patches, texts, autotexts = plt.pie(values, labels=labels,
> +                                        autopct='%1.1f%%', shadow=True,
> +                                        colors=colors)
> +    # Reduce text size
> +    proptease = fm.FontProperties()
> +    proptease.set_size('xx-small')
> +    plt.setp(autotexts, fontproperties=proptease)
> +    plt.setp(texts, fontproperties=proptease)
> +
> +    plt.title('Size per package')
> +    plt.savefig(outputf)
> +
> +parser = argparse.ArgumentParser(description='Draw build time graphs')
> +
> +parser.add_argument("--builddir", '-i', metavar="BUILDDIR",
> +                    help="Buildroot output directory")
> +parser.add_argument("--output", '-o', metavar="OUTPUT", required=True,
> +                    help="Output file (.pdf or .png extension)")
> +args = parser.parse_args()
> +
> +
> +ps = build_package_size(args.builddir)
> +draw_graph(ps, args.output)
> +
> -- 
> 2.0.0
> 
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