Return the free disk space, in bytes, on the file system that hosts FILE.

Build the given TeX Live package, applying all of PHASES in order.

Retrieve a value from ALIST of alists, descending into each value of the list KEY. For instance a KEY (a b) would retrieve alist[a][b].

Parse and evaluate toml document from file FILE.

Parse and evaluate toml document from string STR.

Build in the OUTPUT directory a symlink tree that is the union of all the INPUTS, using SYMLINK to create symlinks. As a special case, if CREATE-ALL-DIRECTORIES?, creates the subdirectories in the output directory to make sure the caller can modify them later.

When two or more regular files collide, call RESOLVE-COLLISION with the list of colliding files and use the one that it returns; or, if RESOLVE-COLLISION returns #f, skip the faulty file altogether.

Given REFERENCE and FILE, both of which are absolute file names, return the file name of FILE relative to REFERENCE.

(relative-file-name "/gnu/store/foo" "/gnu/store/bin/bar") => "../bin/bar"

Note that this is from a purely lexical standpoint; conversely, ".." is *not* resolved lexically on POSIX in the presence of symlinks.

Find a sub-directory named DIRECTORY among the INPUTS and return its absolute file name.

DIRECTORY must be a string like "xml/dtd/docbook". If DIRECTORY is not found, an exception is raised.

Strip the '/gnu/store' and hash from FILE, a store file name. The result is typically a "PACKAGE-VERSION" string.

Atomically switch LINK, a symbolic link, to point to TARGET. Works both when LINK already exists and when it does not.

Copy SOURCE directory to DESTINATION. Follow symlinks if FOLLOW-SYMLINKS? is true; otherwise, just preserve them. Call COPY-FILE to copy regular files. When KEEP-MTIME? is true, keep the modification time of the files in SOURCE on those of DESTINATION. When KEEP-PERMISSIONS? is true, preserve file permissions. Write verbose output to the LOG port. Call (SELECT? FILE STAT) for each entry in source, where FILE is the entry's absolute file name and STAT is the result of 'lstat' (or 'stat' if FOLLOW-SYMLINKS? is true); exclude entries for which SELECT? does not return true.

Replace the #! interpreter file name in FILE by a valid one found in PATH, when FILE actually starts with a shebang. Return #t when FILE was patched, #f otherwise. When KEEP-MTIME? is true, the atime/mtime of FILE are kept unchanged.

Make FILE writable for its owner.

The xz arguments required to enable bit-reproducible, multi-threaded compression.

Return #t if DIR exists and is a directory.