semver:tldr:e17b7
semver: Check if a version string respects the semantic versioning format (prints an empty string if it does not match).
$ semver ${1-2}
try on your machine
This command is using the semver command line tool to generate a semantic version based on one or two input parameters.
${1-2} is a parameter substitution syntax in Bash. It means that if the first parameter $1 is set, it will be used; otherwise, if it is not set, the second parameter $2 will be used.
So in this case, if there is only one argument provided when executing the command, it will generate a semantic version based on that argument. If there are two arguments provided, it will generate a semantic version based on both arguments.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.