Search the bootstrap binary FILE-NAME for SYSTEM. Raise an error if not found.

Return true if we can reach the Internet.

Show basic help for package transformation options.

Return package P tuned for MICRO-ARCHITECTURE.

Return true if KEY is an option key (as returned while parsing options with %TRANSFORMATION-OPTIONS) corresponding to a package transformation option. For example, (transformation-option-key? 'with-input) => #t.

Return package P changed to use the given upstream VERSION or, if VERSION is #f, the latest known upstream version. When PRESERVE-PATCHES? is true, preserve patches and snippets found in the source of P, provided it's an origin. When AUTHENTICATE? is false, disable OpenPGP signature verification of upstream source code. When PRESERVE-ARCHIVE-TYPE? is true, use the same archive type as P's source (gz, xz, zstd, etc.)

Return ENTRY with an additional 'transformations' property if it's not already there.

Return true if package PACKAGE is "tunable"--i.e., if tuning it for the host CPU is worthwhile.

Return a procedure that, when passed an object to build (package, derivation, etc.), applies the transformations specified by OPTS and returns the resulting objects. OPTS must be a list of symbol/string pairs such as:

((with-branch . "guile-gcrypt=master") (without-tests . "libgcrypt"))

Each symbol names a transformation and the corresponding string is an argument to that transformation.

Return true if KEY corresponds to a transformation option whose result can be cached--i.e., the transformation is deterministic and does not depend on external resources.

Display MESSAGE, a l10n message possibly containing Texinfo markup and 'format' escape, to PORT. ARGUMENTS is a (possibly empty) list of strings or other objects that must match the 'format' escapes in MESSAGE.

Read and evaluate STR, which can also be a port, raising an error if something goes wrong. STR may contain one or more expressions; the return value is that of the last evaluated expression.

Like `string->number', but error out with an error message on failure.

Return a new user module with the additional MODULES loaded.

Write to PORT a `recutils' record of package P, arranging to fit within WIDTH columns. EXTRA-FIELDS is a list of symbol/value pairs to emit. When HYPERLINKS? is true, emit hyperlink escape sequences when appropriate. Pass the synopsis and description through HIGHLIGHTING, a one-argument procedure that may return a colorized version of its argument.

Report the failure to load FILE, a user-provided Scheme file, without exiting. ARGS is the list of arguments received by the 'throw' handler.

Return the language used for messages according to the current locale. Return %DEFAULT-MESSAGE-LANGUAGE if that information could not be obtained. The result is an ISO-639-2 language code such as "ar", without the territory part.

Make sure at least NEED bytes are available in DIRECTORY. Otherwise emit a warning.