apply condition on json file and fetch the value and append the output in bash-CodePudding

I have a jq which fetches the particular value from the json file and append the output to a text file. Text file contains the [OPTIONS] NAME for Eg: docker-virtual.artifactory.com.

So the output should go and append as a RepositoryName:TAG to the existing one in the text file.

  "dependencies": [
  {
   "name": "powershell-core",
   "type": "zip",
   "path": "Dependencies",
   "filename": "PowerShell-Core-6.2.3-win-x64.msi"
  },
  {
   "name": "redis",
   "type": "docker-image",
   "path": "redis:6.0.10-alpine3.12",
   "filename": ""
  },
  {
  "name": "keycloak",
  "type": "docker-image",
  "path": "jboss/keycloak:12.0.1",
  "filename": ""
  },
  ]

From this Json file I am fetching the value with the type as docker-image and redirecting the values to a file output.txt

jq -r '.dependencies[] | select(.type == "docker-image").path' packages.json > output.txt

So the output.txt file looks like:

redis:6.0.10-alpine3.12
jboss/keycloak:12.0.1

But I am trying to append this output to a file like:

        docker-virtual.artifactory.com/redis:6.0.10-alpine3.12

How to achieve this?

CodePudding user response：

How about:

jq -r '.dependencies[] | select(.type == "docker-image").path' packages.json |  sed 's/.*/docker-virtual.artifactory.com\/&/'> output.txt

Note this will rewrite output.txt file every time, if your only intention is to append to it then use the '>>' sign like so:

jq -r '.dependencies[] | select(.type == "docker-image").path' packages.json |  sed 's/.*/docker-virtual.artifactory.com\/&/'>> output.txt

Hope this helps.