mirror of
https://github.com/janet-lang/janet
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43 lines
2.0 KiB
Clojure
43 lines
2.0 KiB
Clojure
# Copyright (C) Calvin Rose 2019
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# The bootstrap script is used to produce the source file for
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# embedding the core image.
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# Tool to dump a marshalled version of the janet core to stdout. The
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# image should eventually allow janet to be started from a pre-compiled
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# image rather than recompiled every time from the embedded source. More
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# work will go into shrinking the image (it isn't currently that large but
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# could be smaller), creating the mechanism to load the image, and modifying
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# the build process to compile janet with a built image rather than
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# embedded source.
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# Get image. This image contains as much of the core library and documentation that
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# can be written to an image (no cfunctions, no abstracts (stdout, stdin, stderr)),
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# everything else goes. Cfunctions and abstracts will be referenced from a registry
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# table which will be generated on janet startup.
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(do
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(def image (let [env-pairs (pairs (env-lookup *env*))
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essential-pairs (filter (fn [[k v]] (or (cfunction? v) (abstract? v))) env-pairs)
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lookup (table ;(mapcat identity essential-pairs))
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reverse-lookup (invert lookup)]
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(marshal *env* reverse-lookup)))
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# Create C source file that contains images a uint8_t buffer. This
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# can be compiled and linked statically into the main janet library
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# and example client.
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(def chunks (string/bytes image))
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(def image-file (file/open "build/core_image.c" :w))
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(file/write image-file
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"#ifndef JANET_AMALG\n"
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"#include <janet.h>\n"
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"#endif\n"
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"static const unsigned char janet_core_image_bytes[] = {\n")
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(loop [line :in (partition 10 chunks)]
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(def str (string ;(interpose ", " (map (partial string/format "0x%.2X") line))))
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(file/write image-file " " str ",\n"))
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(file/write image-file
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" 0\n};\n\n"
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"const unsigned char *janet_core_image = janet_core_image_bytes;\n"
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"size_t janet_core_image_size = sizeof(janet_core_image_bytes);\n")
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(file/close image-file))
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