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# specialist handling of header files for Samba
import os, re, sys, fnmatch
from waflib import Build, Logs, Utils, Errors
from samba_utils import TO_LIST
def header_install_path(header, header_path):
'''find the installation path for a header, given a header_path option'''
if not header_path:
return ''
if not isinstance(header_path, list):
return header_path
for (p1, dir) in header_path:
for p2 in TO_LIST(p1):
if fnmatch.fnmatch(header, p2):
return dir
# default to current path
return ''
re_header = re.compile(r'^\s*#\s*include[ \t]*"([^"]+)"', re.I | re.M)
# a dictionary mapping source header paths to public header paths
header_map = {}
def find_suggested_header(hpath):
'''find a suggested header path to use'''
base = os.path.basename(hpath)
ret = []
for h in header_map:
if os.path.basename(h) == base:
ret.append('<%s>' % header_map[h])
ret.append('"%s"' % h)
return ret
def create_public_header(task):
'''create a public header from a private one, output within the build tree'''
src = task.inputs[0].abspath(task.env)
tgt = task.outputs[0].bldpath(task.env)
if os.path.exists(tgt):
os.unlink(tgt)
relsrc = os.path.relpath(src, task.env.TOPDIR)
infile = open(src, mode='r')
outfile = open(tgt, mode='w')
linenumber = 0
search_paths = [ '', task.env.RELPATH ]
for i in task.env.EXTRA_INCLUDES:
if i.startswith('#'):
search_paths.append(i[1:])
for line in infile:
linenumber += 1
# allow some straight substitutions
if task.env.public_headers_replace and line.strip() in task.env.public_headers_replace:
outfile.write(task.env.public_headers_replace[line.strip()] + '\n')
continue
# see if its an include line
m = re_header.match(line)
if m is None:
outfile.write(line)
continue
# its an include, get the header path
hpath = m.group(1)
if hpath.startswith("bin/default/"):
hpath = hpath[12:]
# some are always allowed
if task.env.public_headers_skip and hpath in task.env.public_headers_skip:
outfile.write(line)
continue
# work out the header this refers to
found = False
for s in search_paths:
p = os.path.normpath(os.path.join(s, hpath))
if p in header_map:
outfile.write("#include <%s>\n" % header_map[p])
found = True
break
if found:
continue
if task.env.public_headers_allow_broken:
Logs.warn("Broken public header include '%s' in '%s'" % (hpath, relsrc))
outfile.write(line)
continue
# try to be nice to the developer by suggesting an alternative
suggested = find_suggested_header(hpath)
outfile.close()
os.unlink(tgt)
sys.stderr.write("%s:%u:Error: unable to resolve public header %s (maybe try one of %s)\n" % (
os.path.relpath(src, os.getcwd()), linenumber, hpath, suggested))
raise Errors.WafError("Unable to resolve header path '%s' in public header '%s' in directory %s" % (
hpath, relsrc, task.env.RELPATH))
infile.close()
outfile.close()
def public_headers_simple(bld, public_headers, header_path=None, public_headers_install=True):
'''install some headers - simple version, no munging needed
'''
if not public_headers_install:
return
for h in TO_LIST(public_headers):
inst_path = header_install_path(h, header_path)
if h.find(':') != -1:
s = h.split(":")
h_name = s[0]
inst_name = s[1]
else:
h_name = h
inst_name = os.path.basename(h)
bld.INSTALL_FILES('${INCLUDEDIR}', h_name, destname=inst_name)
def PUBLIC_HEADERS(bld, public_headers, header_path=None, public_headers_install=True):
'''install some headers
header_path may either be a string that is added to the INCLUDEDIR,
or it can be a dictionary of wildcard patterns which map to destination
directories relative to INCLUDEDIR
'''
bld.SET_BUILD_GROUP('final')
if not bld.env.build_public_headers:
# in this case no header munging needed. Used for tdb, talloc etc
public_headers_simple(bld, public_headers, header_path=header_path,
public_headers_install=public_headers_install)
return
# create the public header in the given path
# in the build tree
for h in TO_LIST(public_headers):
inst_path = header_install_path(h, header_path)
if h.find(':') != -1:
s = h.split(":")
h_name = s[0]
inst_name = s[1]
else:
h_name = h
inst_name = os.path.basename(h)
curdir = bld.path.abspath()
relpath1 = os.path.relpath(bld.srcnode.abspath(), curdir)
relpath2 = os.path.relpath(curdir, bld.srcnode.abspath())
targetdir = os.path.normpath(os.path.join(relpath1, bld.env.build_public_headers, inst_path))
if not os.path.exists(os.path.join(curdir, targetdir)):
raise Errors.WafError("missing source directory %s for public header %s" % (targetdir, inst_name))
target = os.path.join(targetdir, inst_name)
# the source path of the header, relative to the top of the source tree
src_path = os.path.normpath(os.path.join(relpath2, h_name))
# the install path of the header, relative to the public include directory
target_path = os.path.normpath(os.path.join(inst_path, inst_name))
header_map[src_path] = target_path
t = bld.SAMBA_GENERATOR('HEADER_%s/%s/%s' % (relpath2, inst_path, inst_name),
group='headers',
rule=create_public_header,
source=h_name,
target=target)
t.env.RELPATH = relpath2
t.env.TOPDIR = bld.srcnode.abspath()
if not bld.env.public_headers_list:
bld.env.public_headers_list = []
bld.env.public_headers_list.append(os.path.join(inst_path, inst_name))
if public_headers_install:
bld.INSTALL_FILES('${INCLUDEDIR}',
target,
destname=os.path.join(inst_path, inst_name), flat=True)
Build.BuildContext.PUBLIC_HEADERS = PUBLIC_HEADERS
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