CODEWITHSUNDEEP
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Corey
Corey

Reputation: 481

Bash Search File for Pattern, Replace Pattern With Code that Includes Git Branch Name

I have a README.md file where I'd like to replace a text identifier {{CODESHIP_CODE}} with a line of code – specifically a build status image code snippet that includes the git branch name.

I'm thinking it would look something like this...

  1. Place the current branch git rev-parse --abbrev-ref HEAD in bash variable
  2. Place the pattern/string to search for in a variable. This pattern/string is just used as an identifier to quickly locate where in the README.md file I want to output my build status image code.
  3. Use sed (possibly grep) to search the README.md file for the specified {{CODESHIP_CODE}} pattern/string and replace it with the build image status code

The code I wrote looks like this:

#!/bin/bash

# Get the current branch
function git_branch {
    git rev-parse --abbrev-ref HEAD
}

# Set variable to current branch
branch=$(git_branch)

# Define the pattern to search for
# This pattern/string gets replaced with the build status image code
id="{{CODESHIP_CODE}}"

# Create build status image code
# Inject the $branch variable into the correct location
codeship_build_status="[ ![Codeship Status for ExampleGitHubUser/ExampleRepo](https://codeship.com/projects/a99d9999-9b9f-9999-99aa-999a9a9a9999/status?branch=$branch)](https://codeship.com/projects/999999)"

# Find the pattern to replace
# Then replace it with the build status image
sed -i -e "s/{{CODESHIP_CODE}}/$codeship_build_status/g" README.md

The problem is that I keep getting the following error:

sed: 1: "s/{{CODESHIP_CODE}}/[ ! ...": bad flag in substitute command: 'a'

I'm not sure how to resolve this issue, so that the script works correctly. Any help would be greatly appreciated.

Upvotes: 1

Views: 95

Answers (1)

choroba
choroba

Reputation: 241918

You can't use a replacement string that contains the unescaped delimiter. Escape the delimiters in the string, or switch to different ones.

${codeship_build_status////\\/} # escape
# or
s%{{CODESHIP_CODE}}%$codeship_build_status%g #

Make sure the new delimiter isn't contained in the string.

Upvotes: 2

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