ref: e6aa7ab6dd219d92b332c3662de95c28f7bd6b8f
dir: /cmake/glob-symlinks.py/
#!/usr/bin/env python3
# Helper script used by the NestedVM cmake build script.
#
# Usage: glob-symlinks.py <srcdir> <wildcard> [<srcdir> <wildcard> ...]
#
# Each pair of command-line arguments is treated as a source
# directory, followed by either a single filename or a wildcard.
#
# The result is to create symlinks in the program's working directory
# mirroring all the files matched by the filenames/wildcards, each
# pointing at the appropriate source directory.
#
# For example, this command
# glob-symlinks.py /foo \*.txt /bar wibble.blah
# might create symlinks as follows:
# this.txt -> /foo/this.txt
# that.txt -> /foo/that.txt
# wibble.blah -> /bar/wibble.blah
#
# CMake could mostly do this itself, except that some of the files
# that need symlinking during the NestedVM build (to make a tree that
# we archive up into a .jar file) are Java class files with some
# '$suffix' in the name, and CMake doesn't escape the $ signs, so that
# the suffix vanishes during shell expansion.
import sys
import os
import glob
def get_arg_pairs():
args = iter(sys.argv)
next(args) # skip program name
while True:
try:
yield next(args), next(args)
except StopIteration:
break
def get_globbed_pairs():
for srcdir, pattern in get_arg_pairs():
if glob.escape(pattern) == pattern:
# Assume that unglobbed filenames exist
#print("non-glob:", srcdir, pattern)
yield srcdir, pattern
else:
#print("globbing:", srcdir, pattern)
prefix = srcdir + "/"
for filename in glob.iglob(prefix + pattern):
assert filename.startswith(prefix)
filename = filename[len(prefix):]
#print(" ->", srcdir, filename)
yield srcdir, filename
for srcdir, filename in get_globbed_pairs():
dirname = os.path.dirname(filename)
if len(dirname) > 0:
try:
os.makedirs(dirname)
except FileExistsError:
pass
try:
os.symlink(os.path.join(srcdir, filename), filename)
except FileExistsError:
pass