无法使用 jq 捕获标签包含数字参数的 imageDigest，但为什么呢？

Question

正在尝试使用 imageTag 提取 ecr 图像摘要。

base ❯ aws ecr list-images --repository-name itaig
{
    "imageIds": [
        {
            "imageDigest": "sha256:ec2ad330fadaf1ef05e30b8ba1ee5a92efb8b39c8d51bbcfb706b1b1a1981020",
            "imageTag": "latest"
        },
        {
            "imageDigest": "sha256:9377451ac4ea941e49d3176457b3d285d6418fec883a9a8fee87a491b79ac06a"
        },
        {
            "imageDigest": "sha256:1fb63f185c11a3300d394f83f8152d391b5f37ee3b17b73702296e979fb42576"
        },
        {
            "imageDigest": "sha256:4fc44daf69561482c9b00858b1a60e6590444703b75d49fed7d46c025520ddac"
        },
        {
            "imageDigest": "sha256:ce109ba9df0e566a4bd9d0a8311596b61def59d51c1b42455170dcb41451f4b0",
            "imageTag": "main-48"
        },
        {
            "imageDigest": "sha256:928950d4cab36d434f99e65bb75e65e4a6218760b1a32a08ac7212b2b6b9b9b0",
            "imageTag": "main-49"
        },
        {
            "imageDigest": "sha256:30a7f57f1a8aea4b00a441fff139806662342f0b584651231ed99738bf9d00b8"
        },
        {
            "imageDigest": "sha256:2319a7b3d5a030cc22efc06be780d6789cbf575822dd96bffbb550e3d20faefd"
        }
    ]
}

~/src/personal/aws-s3-lambda main ⇣
base ❯ TRAVIS_BUILD_NUMBER=49

~/src/personal/aws-s3-lambda main ⇣
base ❯ TRAVIS_BRANCH=main

~/src/personal/aws-s3-lambda main ⇣
base ❯ aws ecr list-images --repository-name itaig | jq -r --arg travis_branch ${TRAVIS_BRANCH} --arg travis_build_number ${TRAVIS_BUILD_NUMBER}  '.imageIds[] | select(.imageTag=="$travis_branch-$travis_build_number") .imageDigest'

如果我不使用 args，它就像一个魅力：

base ❯ aws ecr list-images --repository-name itaig | jq -r '.imageIds[] | select(.imageTag=="main-49") .imageDigest'
sha256:928950d4cab36d434f99e65bb75e65e4a6218760b1a32a08ac7212b2b6b9b9b0

但是jq没有抓到相关的imageDigest

我怀疑它与 travis_build_number 有关系，我想我需要使用“tonumber”，但我不确定将它放在我的查询中的什么位置。

知道怎么做吗？

Answer 1

与其将 2 个参数传递给 JQ，不如将它们组合到 bash 级别的 1 个参数中，如下所示：

jq -r --arg travis_search "$TRAVIS_BRANCH-$TRAVIS_BUILD_NUMBER" '.imageIds[] | select(.imageTag == $travis_search) | .imageDigest'

JqPlay Demo

我本地机器上的示例：

$
$ jq '.' test.json
{
  "imageIds": [
    {
      "imageDigest": "sha256:ec2ad330fadaf1ef05e30b8ba1ee5a92efb8b39c8d51bbcfb706b1b1a1981020",
      "imageTag": "latest"
    },
    {
      "imageDigest": "sha256:9377451ac4ea941e49d3176457b3d285d6418fec883a9a8fee87a491b79ac06a"
    },
    {
      "imageDigest": "sha256:1fb63f185c11a3300d394f83f8152d391b5f37ee3b17b73702296e979fb42576"
    },
    {
      "imageDigest": "sha256:4fc44daf69561482c9b00858b1a60e6590444703b75d49fed7d46c025520ddac"
    },
    {
      "imageDigest": "sha256:ce109ba9df0e566a4bd9d0a8311596b61def59d51c1b42455170dcb41451f4b0",
      "imageTag": "main-48"
    },
    {
      "imageDigest": "sha256:928950d4cab36d434f99e65bb75e65e4a6218760b1a32a08ac7212b2b6b9b9b0",
      "imageTag": "main-49"
    },
    {
      "imageDigest": "sha256:30a7f57f1a8aea4b00a441fff139806662342f0b584651231ed99738bf9d00b8"
    },
    {
      "imageDigest": "sha256:2319a7b3d5a030cc22efc06be780d6789cbf575822dd96bffbb550e3d20faefd"
    }
  ]
}
$
$ TRAVIS_BUILD_NUMBER=49
$ TRAVIS_BRANCH=main
$
$ jq -r --arg travis_search "$TRAVIS_BRANCH-$TRAVIS_BUILD_NUMBER" '.imageIds[] | select(.imageTag == $travis_search) | .imageDigest' test.json
sha256:928950d4cab36d434f99e65bb75e65e4a6218760b1a32a08ac7212b2b6b9b9b0
$
$

Answer 2

使用原题(jq -r --arg travis_branch ${TRAVIS_BRANCH} --arg travis_build_number ${TRAVIS_BUILD_NUMBER} ...)中的调用形式，一个合适的jq程序可以是这样的：

 .imageIds[] 
 | select(.imageTag == "\($travis_branch)-\($travis_build_number)")
 | .imageDigest

无法使用 jq 捕获标签包含数字参数的 imageDigest，但为什么呢？

Unable to catch imageDigest where the tag contains a numeric argument using jq, but why?

string

variables

parameter-passing

jq

string-interpolation

JqPlay Demo