Rapp 0.4.0

Breaking changes

Rapp now checks parsed command line values against declared option types instead of coercing them. Integer options require integer values, so values like 10.2 or true produce an error; float options still accept integer values (#18).
Rapp now parses YAML with YAML 1.2 semantics. Bare yes and no non-Boolean option values are strings, not Boolean aliases. Boolean options still accept YAML 1.1 aliases such as yes, no, y, n, on, and off for backward compatibility.
Command switches are now required by default. If a command is omitted, Rapp prints scoped help. Add #| required: false above the switch() to allow running without a command (#21).
Boolean switch help now shows the command-line form that changes the default: foo <- FALSE shows --foo, foo <- TRUE shows --no-foo, and foo <- NA shows --foo / --no-foo. Passing values remains more permissive: switches accept explicit values such as --foo=false and --foo false. See the Boolean option behavior table for the full set of accepted forms (#28).

#| examples: annotations now add usage examples to --help output (#23).
Boolean switches now do the expected thing for most users without additional configuration. For exceptional needs, #| negative_alias: false disables generated --no-* command-line aliases while keeping the positive alias and explicit value forms such as --foo=false (#24, #28).

Launcher front matter now accepts documented kebab-case option names, such as default-packages (#19).
On Windows, tests now preserve the user PATH (#26).
Rapp can now be installed from source on R versions before 4.0.0 (#30).
The installation docs now clarify that package apps are discovered as exec/*.R, installed without the .R extension by default, and installed to RAPP_BIN_DIR when set (#20).
install_pkg_cli_apps() now adds the default ~/.local/bin install directory to the user’s zsh profile on macOS when it is not already on PATH. It respects ZDOTDIR and warns if the profile cannot be updated (#35).
On Windows, install_pkg_cli_apps() no longer replaces the current process PATH with only the user-level Path after adding launcher directories. It now avoids duplicate entries, uses a short path when available, and reports too-long user-level Path values with a remediation hint (#38).

Positional arguments are now required by default. Use #| required: false to make an argument optional (#13).

#| short now adds a short option alias like -n (#4, #5).
c() and list() assignments now declare repeatable options.
install_pkg_cli_apps() installs launchers for Rapp and Rscript apps in a package’s exec/ directory on the user’s PATH (#3, #7).
switch() blocks can now declare commands in Rapp applications (#8, #11).