57 lines
1.4 KiB
Plaintext
57 lines
1.4 KiB
Plaintext
|
#!/usr/bin/env python
|
||
|
|
|
||
|
|
"""gosh: use Golang as a shell scripting language.
|
||
|
|
|
||
|
|
This is written in Python so that I don't have to commit any binaries to my
|
||
|
|
dotfiles repo, and my Go shell scripts can also remain in source form.
|
||
|
|
|
||
|
|
Usage: write a Go program with this shebang comment on top immediately before
|
||
|
|
the `package main` statement:
|
||
|
|
|
||
|
|
#!/usr/bin/env gosh
|
||
|
|
package main
|
||
|
|
|
||
|
|
And make it executable and run it like any shell script.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import codecs
|
||
|
|
import os
|
||
|
|
import subprocess
|
||
|
|
import sys
|
||
|
|
import tempfile
|
||
|
|
|
||
|
|
def main():
|
||
|
|
if len(sys.argv) == 1:
|
||
|
|
die("Usage: gosh <file.go>")
|
||
|
|
|
||
|
|
# Get the Go source file from the command line.
|
||
|
|
source = sys.argv[1]
|
||
|
|
argv = sys.argv[2:]
|
||
|
|
if not os.path.isfile(source):
|
||
|
|
die("{}: not a file".format(source))
|
||
|
|
|
||
|
|
# Make a temp file that lacks the shebang line of the input file.
|
||
|
|
with codecs.open(source, "r", "utf-8") as fh:
|
||
|
|
# Get the shebang off and sanity check it.
|
||
|
|
shebang = fh.readline()
|
||
|
|
if not "gosh" in shebang:
|
||
|
|
die("{}: doesn't appear to be a Go script".format(source))
|
||
|
|
|
||
|
|
# Write it to a temp file, sans shebang.
|
||
|
|
temp = tempfile.NamedTemporaryFile(delete=False, suffix=".go")
|
||
|
|
temp.write(fh.read().strip())
|
||
|
|
temp.close()
|
||
|
|
|
||
|
|
# Call it.
|
||
|
|
subprocess.call(["go", "run", temp.name] + argv)
|
||
|
|
|
||
|
|
# Clean up.
|
||
|
|
os.unlink(temp.name)
|
||
|
|
|
||
|
|
def die(message):
|
||
|
|
print(message)
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
main()
|