(bash) Nested strings are not parsed correctly

[behrangsa]

Example:

SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
TLS_DIR="$SCRIPT_DIR/../src/main/resources/tls"
ROOT_DIR="$SCRIPT_DIR/.."

---

This is really two things.

• String within string (the posted issue)
• Variable within variable (issue below, from bash: nested variables only partially highlighted #1978)

[joshgoebel]

Bash syntax currently only supports simple variables inside $() blocks in strings:

  };
  var QUOTE_STRING = {
    className: 'string',
    begin: /"/, end: /"/,
    contains: [
      hljs.BACKSLASH_ESCAPE,
      VAR,
      {
        className: 'variable',
        begin: /\$\(/, end: /\)/,
        contains: [hljs.BACKSLASH_ESCAPE]
      }
    ]
  };

To fix this you'd have to make bash self-referential (ie you can have bash inside bash)... I'm not sure that's possible (but need to learn).

Evidently technically this is possible since Ruby does it - if you'd be willing to work on a PR?

[joshgoebel]

This also applies to simple variables without variables (same issue really from #1978):

In a bash script, you may have a variable WURST und refer to it via $WURST or ${WURST}.
You can supply a default value ${WURST:-salami} and that default value may itself be a variable
${WURST:-${CARNE}}. And this is where there's a bug in highlight.js:
In the last example, of the two closing curly braces at the end only the first one gets color, the latter one doesn't -- although it should because it is the closing brace to the very first opening curly brace.