Execute the Elisp code EXPR in Emacs batch mode and return output.

Add a numerically increasing suffix to tests of the same name. This fixes test errors of the pattern "Test TEST_NAME redefined".

Run Emacs in batch mode, and execute the Elisp code EXPR. If DYNAMIC? is true, evaluate using dynamic scoping.

Disable byte compilation for FILE. If NATIVE?, only disable native compilation.

Generate autoloads for Emacs package NAME placed in DIRECTORY.

Byte compile all files in DIR and its sub-directories.

Load FILE in Emacs using batch mode, and execute the elisp code EXPR.

Parse the header SECTION in FILE and return it as a string.

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

Like 'git-fetch', fetch COMMIT from URL into DIRECTORY, but fall back to alternative methods when fetching from URL fails: attempt to download a nar for ITEM, and if that also fails, download from the Software Heritage archive. When HASH and HASH-ALGORITHM are provided, they are interpreted as the nar hash of the directory of interested and are used as its content address at SWH.

Fetch COMMIT from URL into DIRECTORY. COMMIT must be a valid Git commit identifier. When LFS? is true, configure Git to also fetch Large File Storage (LFS) files; it assumes that the git-lfs extension is available in the environment. When RECURSIVE? is true, all the sub-modules of URL are fetched, recursively. Return #t on success, #f otherwise.

Generate the loaders.cache file used by gdk-pixbuf to locate the available loaders among DIRECTORIES, and set the GDK_PIXBUF_MODULE_FILE environment variable. The cache file is installed under OUTPUTS. Return the first cache file name if one was created else #f.

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