Question

我写了一个Bash脚本

#!/usr/bin/env bash 
SEVEN_DAYS="$((1000 * 60 * 60 * 24 * 7))"
TODAY=$(($(gdate +'%s * 1000 + %N / 1000000')))
PAST_WEEK=$(($TODAY - $SEVEN_DAYS))

get-stuff() {
    stuff=$(curl -s localhost:8888/path/to/data | jq --raw-output '[.time_series_by_stuff[].counts | keys | .[]] | unique | sort | .[]')
    echo $stuff
    }

get-last-weeks-events-by-stuff() {
    for stuff in $(get-stuff); do
    result=$(curl -s localhost:8888/path/to/$stuff/_search -d "{\"query\":\"range\":{\"ingestDate\":{ \"gte\":$PAST_WEEK}}}" | jq 'hits.total')
    echo $stuff
    echo $result
    done
}

在命令行get-stuff上单独执行时，将回显我需要的值，例如foo，bar，baz。

如何捕获每个值，以便在get-last-weeks-events-by-stuff内的curl命令中正确扩展它们？

我应该创建像

这样的tmp变量吗？

get-last-weeks-events-by-stuff() {
        for stuff in $(get-stuff); do
        tmp=$stuff
        result=$(curl -s localhost:8888/path/to/$tmp ...

最后，当我调用get-last-weeks-events-by-stuff时，它应该产生类似

的输出

foo 12 bar 15

Answer 1

将IFS环境变量更改为,而不是空格。

get-last-weeks-events-by-stuff() {
  IFS=,
  for stuff in $(get-stuff); do
    result=$(curl -s localhost:8888/path/to/$stuff/_search -d "{\"query\":\"range\":{\"ingestDate\":{ \"gte\":$PAST_WEEK}}}" | jq 'hits.total')
    echo $stuff
    echo $result
  done
  unset IFS
}

根据Linux Documentation Project

$IFS

    internal field separator

    This variable determines how Bash recognizes fields, or word boundaries, when it interprets character strings.

    $IFS defaults to whitespace (space, tab, and newline), but may be changed, for example, to parse a comma-separated data file. Note that $* uses the first character held in $IFS. See Example 5-1.

希望这有帮助。

从Bash for-loop和捕获输出中调用函数？

1 个答案: