- Issue #8233: When run as a script, py_compile.py optionally takes a single
argument `-` which tells it to read files to compile from stdin. Each line
is read on demand and the named file is compiled immediately. (Original
patch by Piotr Ożarowski).
diff --git a/Lib/py_compile.py b/Lib/py_compile.py
index 9f34a0b..9361875 100644
--- a/Lib/py_compile.py
+++ b/Lib/py_compile.py
@@ -138,19 +138,35 @@
not specified) are compiled and the resulting bytecode is cached
in the normal manner. This function does not search a directory
structure to locate source files; it only compiles files named
- explicitly.
+ explicitly. If '-' is the only parameter in args, the list of
+ files is taken from standard input.
"""
if args is None:
args = sys.argv[1:]
rv = 0
- for filename in args:
- try:
- compile(filename, doraise=True)
- except PyCompileError as err:
- # return value to indicate at least one failure
- rv = 1
- sys.stderr.write(err.msg)
+ if args == ['-']:
+ while True:
+ filename = sys.stdin.readline()
+ if not filename:
+ break
+ filename = filename.rstrip('\n')
+ try:
+ compile(filename, doraise=True)
+ except PyCompileError as error:
+ rv = 1
+ sys.stderr.write("%s\n" % error.msg)
+ except IOError as error:
+ rv = 1
+ sys.stderr.write("%s\n" % error)
+ else:
+ for filename in args:
+ try:
+ compile(filename, doraise=True)
+ except PyCompileError as err:
+ # return value to indicate at least one failure
+ rv = 1
+ sys.stderr.write(error.msg)
return rv
if __name__ == "__main__":