Return a <file-system> data structure describing the file system mounted at FILE.

Return true if NAME designates a running network interface.

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

Parse and evaluate toml document from string STR.

Parse and evaluate toml document from file FILE.

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].

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.

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.

Return true if FILE is in the store.

Replace the first pair in ALIST whose car is KEY with the KEY/VALUE pair. An error is raised when no such pair exists.

Return the directory name of the store.

Return #t if PROG is a program that was moved and wrapped by 'wrap-program'.