mirror of
https://github.com/SerenityOS/serenity
synced 2024-09-06 17:06:31 +00:00
112 lines
4.2 KiB
Bash
Executable file
112 lines
4.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -eu
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# This file will need to be run in bash, for now.
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if [ $# -lt 1 ] ; then
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echo "USAGE: echo \"YOURCONFIG\" | $0 <HASH-INVOCATION>" >&2
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echo "Example: echo \"uname=Linux,TARGET=i686-pc-serenity\" | $0 md5sum" >&2
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echo "Example: echo \"uname=OpenBSD,TARGET=i686-pc-serenity\" | $0 md5 -q" >&2
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exit 1
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fi
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DIR=$( cd "$( dirname "$0" )" && pwd )
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cd "${DIR}/.."
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if [ ! -r LICENSE ] ; then
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echo "$0: Got confused by the directories, giving up." >&2
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exit 1
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fi
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# Ensure cleanup
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DEPLIST_FILE=$(mktemp /tmp/serenity_deps_XXXXXXXX.lst)
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function finish {
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rm -f "${DEPLIST_FILE}"
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}
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trap finish EXIT
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# libstdc++ depends on libc and libm, so we pessimistically assume it depends
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# on *all* of their implementation and recursive dependencies.
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# Scan all files for potential dependencies.
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# Thinking in graphs, this computes the edge list:
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cat <(find AK/ Libraries/ Services/ Kernel/ -name '*.h') \
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<(find Libraries/LibC/ Libraries/LibM/ -name '*.cpp' ! -name 'Test*.cpp' ) | \
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xargs grep -F '#include ' | \
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sed -r \
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-e 's,^(.*/)([^/]+:)#include "(.*)",\1\2\1\3,' \
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-e 's^#include <(Kernel/.*)>^\1^' \
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-e 's^#include <(AK/.*)>^\1^' \
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-e 's^#include <(Lib[A-Za-z]+/.*)>^Libraries/\1^' \
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-e 's^#include <((bits|netinet|sys|arpa|net)/.*)>^Libraries/LibC/\1^' \
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-e 's^#include <fd_set.h>^Libraries/LibC/fd_set.h^' \
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-e 's^#include <([a-z]{3,10}(_numbers)?\.h)>^Libraries/LibC/\1^' \
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-e 's^#include <([A-Z][a-z]+Server/.*)>^Services/\1^' \
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-e 's^#include <(.*)>^UNRESOLVED_I/\1^' \
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-e 's^#include "(.*)"^UNRESOLVED_L/\1^' > "${DEPLIST_FILE}"
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# Some #include's cannot be resolved, like <chrono>. However, these are only
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# a problem if they turn up as a transitive dependency of libc and libm.
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# We will check for that when the time comes.
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# The initial guess is pessimistic: *all* of libc and libm.
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FILE_LIST=$(find Libraries/LibC/ Libraries/LibM/ \( -name '*.cpp' -o -name '*.c' -o -name '*.h' \) ! -name 'Test*')
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echo "$0: Exploring dependencies of libstdc++" >&2
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FILE_LIST_COMPLETE="n"
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# In each iteration, we extend FILE_LIST by the dependencies not listed yet in
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# FILE_LIST. Note that the results are always semantically the same,
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# but the order depends on the initial `find` runs.
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for _ in $(seq 10) ; do
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FILE_REGEX=$(echo "${FILE_LIST}" | sed -zr -e 's,\n$,,' -e 's,\.,\\.,g' -e 's,\n,|,g')
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FURTHER_FILE_LIST=$(grep -P "^(${FILE_REGEX}):" "${DEPLIST_FILE}" | grep -Pv ":(${FILE_REGEX})\$" | sed -re 's,^.*:(.*)$,\1,' | sort -u)
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if [ -n "${FURTHER_FILE_LIST}" ] ; then
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# FILE_LIST should grow to a maximum of "number of all .cpp and .c and .h files",
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# i.e. roughly 700 lines. This should be managable, even as the project grows.
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FILE_LIST="${FILE_LIST}
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${FURTHER_FILE_LIST}"
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else
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FILE_LIST_COMPLETE="y"
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break
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fi
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done
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FURTHER_FILE_LIST=""
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FILE_REGEX=""
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if [ "${FILE_LIST_COMPLETE}" != "y" ] ; then
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# Dependency chains might grow very long. Also, if for some reason we fail
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# to filter out the already listed files, the FILE_LIST would grow
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# exponentially. Both of these unpleasant cases are handled by capping the
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# iteration count to 10 and giving up:
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echo "$0: Dependencies don't seem to converge, giving up." >&2
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exit 1
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fi
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# Sort for reproducability,
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FILE_LIST=$(echo "${FILE_LIST}" | LC_ALL=C sort -u)
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if grep -F 'UNRESOLVED' <<EOLIST >&2 ; then
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${FILE_LIST}
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EOLIST
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echo "$0: Unresolved dependency, giving up."
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exit 1
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fi
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echo "$0: Computing hashes" >&2
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# "$@" is the md5sum invocation. The piping might hide non-zero exit-codes,
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# but thankfully only the first command can reasonably fail.
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# Also, abuse the deplist file as a temporary buffer.
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cat /dev/stdin > "${DEPLIST_FILE}"
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HASHES=$(xargs "$@" <<EOLIST
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${FILE_LIST}
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Toolchain/ComputeDependenciesHash.sh
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${DEPLIST_FILE}
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EOLIST
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)
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# Caller (probably BuildIt.sh) should inject it's own hash via stdin.
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# Mask the temporary (= non-reproducable) name of the DEPLIST_FILE:
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HASHES=$(echo "${HASHES}" | sed -re 's,/tmp/serenity_deps_........\.lst,CONFIG,')
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echo "$0: Hashes are:" >&2
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echo "${HASHES}" >&2
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echo "$0: Toolchain hash:" >&2
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cat <<EOHASH | "$@" - | cut -f1 -d' ' | tee /dev/stderr
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${HASHES}
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EOHASH
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echo "$0: Great success!" >&2
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