#!/usr/bin/env python
#
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

"""
Verify that sections of LaTeX output that use auxiliary files (a
bibliography in our configuration below) are consistent when re-run
after modifying the input file.

This checks for a bug that was triggered by the presence of auxiliary
files which were detected by SCons but then removed prior to invoking
TeX, causing the auxiliary sections to be excluded from the output.
That was fixed (courtesy Joel B. Mohler) by making all the relevant
auxiliary files Precious().

Test configuration courtesy Dmitry Mikhin.
"""

import TestSCons

test = TestSCons.TestSCons()

dvips = test.where_is('dvips')
latex = test.where_is('latex')

if not dvips or not latex:
    test.skip_test("Could not find dvips or latex; skipping test(s).\n")


test.subdir(['docs'])

test.write(['SConstruct'], """\
import os
env = Environment(tools = ['pdftex', 'dvipdf', 'dvips', 'tex', 'latex'],
                  ENV = {'PATH' : os.environ['PATH']},
                  BUILD_DIR = '#build/docs')

# Use 'duplicate=1' because LaTeX toolchain does not work properly for
# input/output files outside of the current directory

env.VariantDir('$BUILD_DIR', 'docs', duplicate=1)
env.SConscript('$BUILD_DIR/SConscript', exports = ['env'])
""")

test.write(['docs', 'SConscript'], """\
Import('env')
envc = env.Clone()

test_dvi = envc.DVI(source='test.tex')
test_ps = envc.PostScript(source='test.tex')
test_pdf = envc.PDF(source='test.tex')

envc.Default(test_dvi)
envc.Default(test_ps)
envc.Default(test_pdf)
""")

test.write(['docs', 'my.bib'], """\
@ARTICLE{Mikhin,
   author = "Dmitry {\uppercase{Y}u}. Mikhin",
   title = "Blah!",
   journal = "Some yellow paper",
   year = "2007",
   volume = "7",
   number = "3",
   pages = "1--2"
}
""")

tex_input = r"""\documentclass{article}

\title{BUG IN SCONS}

\author{Dmitry Yu. Mikhin}

\begin{document}

\maketitle


\begin{abstract}
\noindent A bug in BibTeX processing?
\end{abstract}


\section{The problem}

Provide a citation here: \cite{Mikhin}.


\bibliography{my}
\bibliographystyle{unsrtnat}

\end{document}
"""

test.write(['docs', 'test.tex'], tex_input)

test.run(stderr=None)

pdf_output_1 = test.read(['build', 'docs', 'test.pdf'])
ps_output_1 = test.read(['build', 'docs', 'test.ps'])

# Adding blank lines will cause SCons to re-run the builds, but the
# actual contents of the output files should be the same modulo
# the CreationDate header and some other PDF garp.
test.write(['docs', 'test.tex'], tex_input + "\n\n\n")

test.run(stderr=None)

pdf_output_2 = test.read(['build', 'docs', 'test.pdf'])
ps_output_2 = test.read(['build', 'docs', 'test.ps'])



pdf_output_1 = test.normalize_pdf(pdf_output_1)
pdf_output_2 = test.normalize_pdf(pdf_output_2)

if pdf_output_1 != pdf_output_2:
    import sys
    test.write(['build', 'docs', 'test.normalized.1.pdf'], pdf_output_1)
    test.write(['build', 'docs', 'test.normalized.2.pdf'], pdf_output_2)
    sys.stdout.write("***** 1.pdf and 2.pdf are different!\n")
    sys.stdout.write(test.diff_substr(pdf_output_1, pdf_output_2, 80, 80) + '\n')
    sys.stdout.write("Output from run 1:\n")
    sys.stdout.write(test.stdout(-1) + '\n')
    sys.stdout.write("Output from run 2:\n")
    sys.stdout.write(test.stdout() + '\n')
    sys.stdout.flush()
    test.fail_test()

if ps_output_1 != ps_output_2:
    import sys
    sys.stdout.write("***** 1.ps and 2.ps are different!\n")
    sys.stdout.write(test.diff_substr(ps_output_1, ps_output_2, 80, 80) + '\n')
    sys.stdout.write("Output from run 1:\n")
    sys.stdout.write(test.stdout(-1) + '\n')
    sys.stdout.write("Output from run 2:\n")
    sys.stdout.write(test.stdout() + '\n')
    sys.stdout.flush()
    test.fail_test()



test.pass_test()