是否可以将一串go代码传递给go run
而不是go run /some/path/script.go
?我试过了:
echo "some awesome go code here" | go run
但不起作用。谢谢。
是否可以将一串go代码传递给go run
而不是go run /some/path/script.go
?我试过了:
echo "some awesome go code here" | go run
但不起作用。谢谢。
因为我认为这将是一个有用的东西,所以我编写了一个相对较小的 Python 脚本来实现我认为你想要的。我称之为它go-script
,这里有一些用法示例:
# Assuming that test.go is a valid go file including package and imports
$ go-script --no-package < test.go
# Runs code from stdin, importing 'fmt' and wrapping it in a func main(){}
$ echo 'fmt.Println("test")' | go-script --import fmt --main
$ echo 'fmt.Println("test")' | go-script -ifmt -m
帮助:
Usage: go-script [options]
Options:
-h, --help show this help message and exit
-i PACKAGE, --import=PACKAGE
Import package of given name
-p, --no-package Don't specify 'package main' (enabled by default)
-m, --main Wrap input in a func main() {} block
-d, --debug Print the generated Go code instead of running it.
来源(也可作为 gist获得):
#!/usr/bin/env python
from __future__ import print_function
from optparse import OptionParser
import os
import sys
parser = OptionParser()
parser.add_option("-i", "--import", dest="imports", action="append", default=[],
help="Import package of given name", metavar="PACKAGE")
parser.add_option("-p", "--no-package", dest="package", action="store_false", default=True,
help="Don't specify 'package main' (enabled by default)")
parser.add_option("-m", "--main", dest="main", action="store_true", default=False,
help="Wrap input in a func main() {} block")
parser.add_option("-d", "--debug", dest="debug", action="store_true", default=False,
help="Print the generated Go code instead of running it.")
(options, args) = parser.parse_args()
stdin = ""
for line in sys.stdin.readlines():
stdin += "%s\n" % line
out = ""
if options.package:
out += "package main\n\n"
for package in options.imports:
out += "import \"%s\"\n" % package
out += "\n"
if options.main:
out += "func main() {\n%s\n}\n" % stdin
else:
out += stdin
if options.debug:
print(out)
else:
tmpfile = "%s%s" % (os.environ["TMPDIR"], "script.go")
f = open(tmpfile, 'w')
print(out, file=f)
f.close()
os.execlp("go", "", "run", tmpfile)
我不认为有这样的选择。至少不使用标准*g
编译器或
go run
.
您可以尝试使用gccgo,因为GCC 支持从 stdin 读取。
这有效
cat <<EOF | tee /tmp/blah.go | go run /tmp/blah.go
package main
import "fmt"
func main() {
fmt.Println("Hello, World!")
}
EOF
如果您不想先打开文件并对其进行编辑。虽然我不会发现这种超级实用的日常使用。