Question

我试图创建一个条件管道NextFlow。例如，

进程A向通道输出值。如果值为1，则运行X，否则运行Y.

这就是我要做的事情：

initialData = 2
receiver1 = "EMPTY"
receiver2 = "EMPTY"
receiver3 = ""


process A {
    input:
    val initialData

    output:
    val initialData into trigger
    '''
    echo 10
    '''
}

process foo {
    input:
    val trigger

    output:
    val "I ran from FOO" into receiver2


    when:
    trigger == 2

    '''
    echo I ran from FOO
    '''
}


process bar {
    input:
    val trigger

    output:
    val "I ran from BAR" into receiver1


    when:
    trigger == 1

    '''
    echo I ran from BAR
    '''
}

假设foo和bar是等效但不同的实现（例如，一个将电影从AVI转换为h.264，另一个从MOV转换为h.264）。我想要另一个过程，比如说C，可以从Bar或Foo读取，而不知道触发器的任何信息。但是，如果我在Foo和Bar中使用相同的输出通道名称，则nextflow会抱怨。

Answer 1

您可以在流程中使用conditional scripts并仅使用一个渠道。

process action {
   input:
   val t from trigger
   file in from input_channel

   output:
   file out into unique_receiver

   script:
   if (t == 1)
       """
       foo ${in} > ${out}
       """
   else if (t == 2)
       """
       bar ${in} > ${out}
       """
}

Nextflow中的条件管道

1 个答案: