externals: Add fmt subtree

Merge commit 'a9f62a15cd' as 'externals/fmt'

externals/fmt/doc/build.py

@@ -0,0 +1,117 @@
+#!/usr/bin/env python
+# Build the documentation.
+
+from __future__ import print_function
+import errno, os, shutil, sys, tempfile
+from subprocess import check_call, check_output, CalledProcessError, Popen, PIPE
+from distutils.version import LooseVersion
+
+def pip_install(package, commit=None, **kwargs):
+  "Install package using pip."
+  min_version = kwargs.get('min_version')
+  if min_version:
+    from pkg_resources import get_distribution, DistributionNotFound
+    try:
+      installed_version = get_distribution(os.path.basename(package)).version
+      if LooseVersion(installed_version) >= min_version:
+        print('{} {} already installed'.format(package, min_version))
+        return
+    except DistributionNotFound:
+      pass
+  if commit:
+    package = 'git+https://github.com/{0}.git@{1}'.format(package, commit)
+  print('Installing {0}'.format(package))
+  check_call(['pip', 'install', package])
+
+def create_build_env(dirname='virtualenv'):
+  # Create virtualenv.
+  if not os.path.exists(dirname):
+    check_call(['virtualenv', dirname])
+  import sysconfig
+  scripts_dir = os.path.basename(sysconfig.get_path('scripts'))
+  activate_this_file = os.path.join(dirname, scripts_dir, 'activate_this.py')
+  with open(activate_this_file) as f:
+    exec(f.read(), dict(__file__=activate_this_file))
+  # Import get_distribution after activating virtualenv to get info about
+  # the correct packages.
+  from pkg_resources import get_distribution, DistributionNotFound
+  # Upgrade pip because installation of sphinx with pip 1.1 available on Travis
+  # is broken (see #207) and it doesn't support the show command.
+  pip_version = get_distribution('pip').version
+  if LooseVersion(pip_version) < LooseVersion('1.5.4'):
+    print("Updating pip")
+    check_call(['pip', 'install', '--upgrade', 'pip'])
+  # Upgrade distribute because installation of sphinx with distribute 0.6.24
+  # available on Travis is broken (see #207).
+  try:
+    distribute_version = get_distribution('distribute').version
+    if LooseVersion(distribute_version) <= LooseVersion('0.6.24'):
+      print("Updating distribute")
+      check_call(['pip', 'install', '--upgrade', 'distribute'])
+  except DistributionNotFound:
+    pass
+  # Install Sphinx and Breathe.
+  pip_install('sphinx-doc/sphinx', '12b83372ac9316e8cbe86e7fed889296a4cc29ee',
+              min_version='1.4.1.dev20160531')
+  pip_install('michaeljones/breathe',
+              '6b1c5bb7a1866f15fc328b8716258354b10c1daa',
+              min_version='4.2.0')
+
+def build_docs(version='dev', **kwargs):
+  doc_dir = kwargs.get('doc_dir', os.path.dirname(os.path.realpath(__file__)))
+  work_dir = kwargs.get('work_dir', '.')
+  include_dir = kwargs.get('include_dir',
+                           os.path.join(os.path.dirname(doc_dir), 'fmt'))
+  # Build docs.
+  cmd = ['doxygen', '-']
+  p = Popen(cmd, stdin=PIPE)
+  doxyxml_dir = os.path.join(work_dir, 'doxyxml')
+  p.communicate(input=r'''
+      PROJECT_NAME      = fmt
+      GENERATE_LATEX    = NO
+      GENERATE_MAN      = NO
+      GENERATE_RTF      = NO
+      CASE_SENSE_NAMES  = NO
+      INPUT             = {0}/container.h {0}/format.h {0}/ostream.h \
+                          {0}/printf.h {0}/string.h
+      QUIET             = YES
+      JAVADOC_AUTOBRIEF = YES
+      AUTOLINK_SUPPORT  = NO
+      GENERATE_HTML     = NO
+      GENERATE_XML      = YES
+      XML_OUTPUT        = {1}
+      ALIASES           = "rst=\verbatim embed:rst"
+      ALIASES          += "endrst=\endverbatim"
+      MACRO_EXPANSION   = YES
+      PREDEFINED        = _WIN32=1 \
+                          FMT_USE_VARIADIC_TEMPLATES=1 \
+                          FMT_USE_RVALUE_REFERENCES=1 \
+                          FMT_USE_USER_DEFINED_LITERALS=1 \
+                          FMT_API=
+      EXCLUDE_SYMBOLS   = fmt::internal::* StringValue write_str
+    '''.format(include_dir, doxyxml_dir).encode('UTF-8'))
+  if p.returncode != 0:
+    raise CalledProcessError(p.returncode, cmd)
+  html_dir = os.path.join(work_dir, 'html')
+  versions = ['3.0.0', '2.0.0', '1.1.0']
+  check_call(['sphinx-build',
+              '-Dbreathe_projects.format=' + os.path.abspath(doxyxml_dir),
+              '-Dversion=' + version, '-Drelease=' + version,
+              '-Aversion=' + version, '-Aversions=' + ','.join(versions),
+              '-b', 'html', doc_dir, html_dir])
+  try:
+    check_call(['lessc', '--clean-css',
+                '--include-path=' + os.path.join(doc_dir, 'bootstrap'),
+                os.path.join(doc_dir, 'fmt.less'),
+                os.path.join(html_dir, '_static', 'fmt.css')])
+  except OSError as e:
+    if e.errno != errno.ENOENT:
+      raise
+    print('lessc not found; make sure that Less (http://lesscss.org/) ' +
+          'is installed')
+    sys.exit(1)
+  return html_dir
+
+if __name__ == '__main__':
+  create_build_env()
+  build_docs(sys.argv[1])