[SOLVED] Replace one square bracket and new line in all files using Shell script

Issue

I know many similar questions exist, but I couldn't figure this particular pattern out and hence posting here (after spending lot of time and giving up). Please help :)

There's a string that I need to match and replace in all files in a given directory.

What it looks:

tag: 
  ["https://example.com"]

What it should be converted to:

tag: "https://example.com"

I need to match the patterns: tag \n [ and "] and replace them from all files.

This is what I tried but it didn't work:

find . -type f -name "*.md" -print0 | xargs -0 sed -i '' -e 's/tag: \\n  \[\"/tag: /g'

find . -type f -name "*.md" -print0 | xargs -0 sed -i '' -e 's/\"\]/\"/g'

Solution

sed -e '/^tag: $/!b' -e '$b' -e 'N;s/\n *\["/"/;s/"]/"/' file

Tip: don't use -i until edits are correct.

Answered By - rowboat