1# handle substitution of variables in pc files
2
3import os, re, sys
4from waflib import Build, Logs
5from samba_utils import SUBST_VARS_RECURSIVE, TO_LIST
6
7def subst_at_vars(task):
8    '''substiture @VAR@ style variables in a file'''
9
10    s = task.inputs[0].read()
11    # split on the vars
12    a = re.split('(@\w+@)', s)
13    out = []
14    done_var = {}
15    back_sub = [ ('PREFIX', '${prefix}'), ('EXEC_PREFIX', '${exec_prefix}')]
16    for v in a:
17        if re.match('@\w+@', v):
18            vname = v[1:-1]
19            if not vname in task.env and vname.upper() in task.env:
20                vname = vname.upper()
21            if not vname in task.env:
22                Logs.error("Unknown substitution %s in %s" % (v, task.name))
23                sys.exit(1)
24            v = SUBST_VARS_RECURSIVE(task.env[vname], task.env)
25            # now we back substitute the allowed pc vars
26            for (b, m) in back_sub:
27                s = task.env[b]
28                if s == v[0:len(s)]:
29                    if not b in done_var:
30                        # we don't want to substitute the first usage
31                        done_var[b] = True
32                    else:
33                        v = m + v[len(s):]
34                    break
35        out.append(v)
36    contents = ''.join(out)
37    task.outputs[0].write(contents)
38    return 0
39
40
41def PKG_CONFIG_FILES(bld, pc_files, vnum=None, extra_name=None):
42    '''install some pkg_config pc files'''
43    dest = '${PKGCONFIGDIR}'
44    dest = bld.EXPAND_VARIABLES(dest)
45    for f in TO_LIST(pc_files):
46        if extra_name:
47            target = f.split('.pc')[0] + extra_name + ".pc"
48        else:
49            target = f
50        base=os.path.basename(target)
51        t = bld.SAMBA_GENERATOR('PKGCONFIG_%s' % base,
52                                rule=subst_at_vars,
53                                source=f+'.in',
54                                target=target)
55        bld.add_manual_dependency(bld.path.find_or_declare(f), bld.env['PREFIX'].encode('utf8'))
56        t.vars = []
57        if t.env.RPATH_ON_INSTALL:
58            t.env.LIB_RPATH = t.env.RPATH_ST % t.env.LIBDIR
59        else:
60            t.env.LIB_RPATH = ''
61        if vnum:
62            t.env.PACKAGE_VERSION = vnum
63        for v in [ 'PREFIX', 'EXEC_PREFIX', 'LIB_RPATH' ]:
64            t.vars.append(t.env[v])
65        bld.INSTALL_FILES(dest, target, flat=True, destname=base)
66Build.BuildContext.PKG_CONFIG_FILES = PKG_CONFIG_FILES
67
68
69