add stdin support

README.md

@@ -62,15 +62,17 @@ ti842py can be installed via PyPI or by cloning the repository. To install it wi
 
 Feel free to use the programs found at [https://github.com/TabulateJarl8/tiprograms](https://github.com/TabulateJarl8/tiprograms) to test this project out.
 
+## CLI Usage
+
 ti842py can be used in 3 different ways. The first way is just running it from the command line. For example, if you wanted to convert the program in `tiprogram.txt` to `tiprogram.py`, you can this command: `ti842py tiprogram.txt -o tiprogram.py`. If no value is specified for `-o`, the converted program will be written to `stdout`. The `-n` flag can be added to force the transpiler to not decompile the input file, and the `-d` flag can be added to force the transpiler to attempt and decompile the input file. If the `--run` or `-r` argument is supplied, the resulting python file will be run after it is done transpiling
 
 ```
-usage: ti842py [-h] [-o OUTFILE] [-n] [-d] [--no-fix-multiplication] [-r] [-V] infile
+usage: ti842py [-h] [-o OUTFILE] [-n] [-d] [--no-fix-multiplication] [--no-fix-floating-point] [--turbo-draw] [-r] [-V] [infile]
 
 TI-BASIC to Python 3 Transpiler
 
 positional arguments:
-  infile                Input file.
+  infile                Input file (filename or stdin).
 
 optional arguments:
   -h, --help            show this help message and exit
@@ -88,6 +90,19 @@ optional arguments:
   -V, --version         show program's version number and exit
 ```
 
+### Advanced terminal usage
+
+You can use ti842py by piping files to it's stdin. This can be done via pipes or redirects, and the files can be either 8Xp or plain text files, just like normal. Here's some examples:
+
+```sh
+$ cat BAR.8Xp | ti842py --run
+$ ti842py -o bar.py < BAR.8Xp
+$ cat CLOCK.bas | ti842py -nr
+$ ti842py --no-fix-floating-point --run < CLOCK.bas
+```
+
+## Programmatic Usage
+
 ti842py can also be imported and used in a program. Here is an example program to convert `tiprogram.txt` to `tiprogram.py`:
 
 ```py

ti842py/__version__.py

@@ -1,7 +1,7 @@
 __title__ = "ti842py"
 __description__ = "TI-BASIC to Python 3 Transpiler"
 __url__ = "https://github.com/TabulateJarl8/ti842py"
-__version__ = "0.7.9"
+__version__ = "0.8.0"
 __author__ = "Tabulate"
 __author_email__ = "[email protected]"
 __license__ = "GPLv3"

ti842py/main.py

@@ -4,6 +4,8 @@
 import tempfile
 import sys
 import subprocess
+import io
+import pty
 
 try:
 	from .tiParser import TIBasicParser
@@ -29,6 +31,16 @@ def isUTF8(file):
 
 def transpile(infile, outfile="stdout", decompileFile=True, forceDecompile=False, multiplication=True, floating_point=True, turbo_draw=False, run=False):
 
+	# detect stdin
+	if not os.path.exists(infile.name):
+		# Don't auto close since we are shadowing infile
+		temp_stdin = tempfile.NamedTemporaryFile()
+		temp_stdin.write(infile.buffer.read())
+		temp_stdin.seek(0)
+		infile = temp_stdin.name
+	else:
+		infile = infile.name
+
 	decode = not isUTF8(infile) and decompileFile is True
 
 	if decode is True or forceDecompile is True:
@@ -47,6 +59,10 @@ def transpile(infile, outfile="stdout", decompileFile=True, forceDecompile=False
 
 		pythonCode = TIBasicParser(file_lines, multiplication, floating_point, turbo_draw).toPython()
 
+	# Close temp_stdin if used
+	if 'temp_stdin' in vars() or 'temp_stdin' in globals():
+		temp_stdin.close()
+
 	# Write to outfile
 	if outfile == "stdout":
 		if run is False:
@@ -56,7 +72,16 @@ def transpile(infile, outfile="stdout", decompileFile=True, forceDecompile=False
 				for line in pythonCode:
 					f.write(line.encode() + b"\n")
 				f.seek(0)
-				proc = subprocess.Popen([sys.executable, f.name])
+
+				# test if something was piped to stdin
+				if 'temp_stdin' in vars() or 'temp_stdin' in globals():
+					# Create new tty to handle ioctl errors in termios
+					master_fd, slave_fd = pty.openpty()
+					proc = subprocess.Popen([sys.executable, f.name], stdin=slave_fd)
+				else:
+					# Nothing was piped to stdin
+					proc = subprocess.Popen([sys.executable, f.name])
+
 				try:
 					proc.wait()
 				except (Exception, KeyboardInterrupt):
@@ -71,11 +96,13 @@ def transpile(infile, outfile="stdout", decompileFile=True, forceDecompile=False
 
 def main():
 	parser = argparse.ArgumentParser(description='TI-BASIC to Python 3 Transpiler')
-	parser.add_argument(
+	infile_argument = parser.add_argument(
 		'infile',
 		metavar='infile',
-		nargs=1,
-		help="Input file."
+		nargs='?',
+		type=argparse.FileType('r'),
+		default=(None if sys.stdin.isatty() else sys.stdin),
+		help="Input file (filename or stdin)."
 	)
 	parser.add_argument(
 		'-o',
@@ -136,7 +163,16 @@ def main():
 	)
 
 	args = parser.parse_args()
-	transpile(args.infile[0], args.outfile, args.n, args.d, args.multiplication, args.floating_point, args.turbo_draw, args.run)
+
+	if hasattr(args.infile, '__getitem__'):
+		infile = args.infile[0]
+	else:
+		infile = args.infile
+
+	if infile is None:
+		raise argparse.ArgumentError(infile_argument, 'the infile argument is required')
+
+	transpile(infile, args.outfile, args.n, args.d, args.multiplication, args.floating_point, args.turbo_draw, args.run)
 
 
 if __name__ == "__main__":