我正在尝试用 Go 做多个管道:
ctags := exec.Command("ctags", "-x", "--c-types=f", "./tmp/"+fileName)
grep := exec.Command("grep", "member")
awk := exec.Command("awk", "'{$1=$2=$3=$4=\"\"; print $0}'")
grep.Stdin, _ = ctags.StdoutPipe()
awk.Stdin, _ = grep.StdoutPipe()
awk.Stdout = os.Stdout
_ = grep.Start()
_ = awk.Start()
_ = ctags.Run()
_ = grep.Wait()
_ = awk.Wait()
fmt.Println(awk)
这是预期的输出应该是这样的:
$ ctags -x --c-types=f ./tmp/genetic_algorithm.py | grep member | awk '{$1=$2=$3=$4=""; print $0}'
def __init__(self, vector, fitness_function):
def __init__(self, population_size=10, crossover_points=[.3, .6],
def apply_crossover(self, genotype_1, genotype_2):
def apply_mutation(self, child_genotype):
def calc_population_fitness(self, individuals):
def evolve(self):
def final_genotype(self):
def fitness(self):
def generate_offspring(self, selected):
def genotype(self, indiv):
def get_accuracy(nn_hidden_structure=[10]):
def parse_bitstring(self, genotype):
def run(self):
def select_for_crossover(self):
def slice_vector(self, vector):
def validate_vector(self, vector, max_nodes=100):
def vector_from_bitstring(self, genotype):
这是我得到的:
&{/usr/bin/awk [awk '{$1=$2=$3=$4=""; print $0}'] [] 0xc4204ce020 0xc42007e008 <nil> [] <nil> 0xc4201fa900 exit status 2 <nil> <nil> true [0xc4204ce020 0xc42007e008 0xc4204ce048] [0xc4204ce048] [] [] 0xc420070360 <nil>}
我发现了几个使用 Go 传递命令的示例,但其中大多数只传递两个命令。有这个例子 https://gist.github.com/dagoof/1477401 ,但是当我根据那个逻辑安排我的代码时,我遇到了同样的问题。我管道正确吗?该命令只是应该在该 Python 文件上执行 exuberant ctags,然后 grep 指示方法的任何行,然后仅忽略 grep 输出的前四列。
最佳答案
问题在于:
awk := exec.Command("awk", "'{$1=$2=$3=$4=\"\"; print $0}'")
我只需要删除单引号。
awk := exec.Command("awk", "{$1=$2=$3=$4=\"\"; print $0}")
关于bash - Golang exec.Command 多个管道,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41400960/