failure during substitution with custom user prompt

[hughlunnon]

we've an application that builds completely correctly on most people's laptops and on our build environment, however in my local environment I get the following issue :

Unresolved substitution ${COLOR_USR}%n@%M ${COLOR_DIR}%d ${COLOR_GIT}$(parse_git_branch)${COLOR_DEF}${NEWLINE}%% at (env) MultipleFailures(failures=com.sksamuel.hoplite.fp.NonEmptyList@57087e4f) java.lang.RuntimeException: Unresolved substitution ${COLOR_USR}%n@%M ${COLOR_DIR}%d ${COLOR_GIT}$(parse_git_branch)${COLOR_DEF}${NEWLINE}%% at (env) MultipleFailures(failures=com.sksamuel.hoplite.fp.NonEmptyList@57087e4f)

I've done a bit of hunting and it seems this is because a variable being picked up by hoplite (called "PROMPT") which is the setup of my command prompt (which has a few nice tweaks to show the current git branch in colour, as per https://stackoverflow.com/questions/17333531/how-can-i-display-the-current-branch-and-folder-path-in-terminal)

specifically the value of PROMPT is

${COLOR_USR}%n@%M ${COLOR_DIR}%d ${COLOR_GIT}$(parse_git_branch)${COLOR_DEF}${NEWLINE}%% 

I guess this is borking somewhere in an attempt to parse some environment variables (as its full of % and $ symbols) - is there a way to either

• exclude this env variable specifically (probably undesirable)
• allow for failed parseing of env variables to be skipped instead of floating them to the top (there may already be a way of doing this I'm unaware of)
• something else?

happy to help with debugging