Movimiento de "Cuadrado" veloz en mapa blanco
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#!/usr/bin/env bash
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# Configure (if needed) and build the project, preferably with Ninja.
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#
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# Usage (from the project root):
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# scripts/build.sh [--preset <name>] [BUILD_TYPE] [CMAKE_ARGS...]
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# scripts/build.sh --list-presets
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# scripts/build.sh --help
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#
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# --preset <name> Use a CMakePresets.json preset. A preset selects that
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# target's toolchain file (cmake/toolchains/<name>.cmake),
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# which picks the compiler and declares the DIST_TARGET
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# together, instead of you having to pass a matching
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# pair by hand:
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# scripts/build.sh --preset windows-x64-mingw64
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# Each preset builds in its own directory,
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# out/build/<name>, so switching between presets never
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# invalidates -- or deletes -- another one's build.
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# Run --list-presets to see every preset for your OS.
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# Must come first if given at all; --preset=<name> also
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# works. Given with no value, or a value that isn't one
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# of --list-presets' own, this fails fast with that
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# same preset list shown right there, rather than
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# letting a typo fall through to a less obvious `cmake`
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# error further down.
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# BUILD_TYPE Debug|Release|RelWithDebInfo|MinSizeRel
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# (default: Configuration.cmake's DEFAULT_BUILD_TYPE)
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# CMAKE_ARGS Anything else is forwarded to `cmake` verbatim, e.g.:
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# scripts/build.sh --preset windows-x64-mingw64 Debug -DBUILD_TESTS=ON
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# scripts/build.sh -DBUILD_TESTS=ON
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# (BUILD_TYPE omitted -- recognized by not
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# starting with "-")
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#
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# Picking a DIST_TARGET: three ways; the first two set the compiler and the
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# label together, and this script rejects mixing --preset with a
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# -DDIST_TARGET rather than leaving it ambiguous which one wins.
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# 1. --preset <name> The recommended way; see --list-presets.
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# 2. -DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/<name>.cmake
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# (no --preset) What a preset does, by hand, as one of
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# CMAKE_ARGS above.
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# 3. -DDIST_TARGET=<value> Sets the label alone, as one of CMAKE_ARGS
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# (no --preset) above. Without also passing a matching
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# compiler (or, better, the toolchain file
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# above), DIST_TARGET is auto-detected from
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# whatever compiler CMake finds on its own; if
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# the two disagree, Configuration.cmake
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# FATAL_ERRORs rather than silently building
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# the wrong toolchain and mislabeling the
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# result -- see that file and the README.
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# Passing --preset together with an explicit -DDIST_TARGET=... in
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# CMAKE_ARGS is rejected by this script before cmake even runs: the
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# preset's toolchain already declares DIST_TARGET, so a second value
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# alongside it is always either redundant (same value) or contradictory
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# (different value) -- never useful.
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#
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# Build directory: out/build/<preset> for --preset <preset>; without a
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# preset, out/build/default (the compiler is auto-detected there, so keep
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# to one compiler per directory or use presets). Set BUILD_DIR to use an
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# exact directory of your own instead. scripts/run.sh, install.sh and
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# docs.sh use the directory built last, or --preset <name> to pick another.
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set -euo pipefail
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shopt -s nullglob
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usage() {
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cat <<'EOF'
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Usage: scripts/build.sh [--preset <name>] [BUILD_TYPE] [CMAKE_ARGS...]
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scripts/build.sh --list-presets
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scripts/build.sh --help
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--preset <name> Use a CMakePresets.json preset: it selects the target's
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toolchain file (compiler and DIST_TARGET together) and
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builds in its own directory, out/build/<name>. Must come
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first if given at all; --preset=<name> also works. Run
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--list-presets to see every preset for your OS.
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BUILD_TYPE Debug|Release|RelWithDebInfo|MinSizeRel
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(default: Configuration.cmake's DEFAULT_BUILD_TYPE)
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CMAKE_ARGS Anything else is forwarded to `cmake` verbatim, e.g.
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-DDIST_TARGET=<value> or -DBUILD_TESTS=ON.
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Don't combine --preset with an explicit -DDIST_TARGET=... in CMAKE_ARGS --
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the preset's toolchain already declares one; see the comment at the top of
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this script (scripts/build.sh) and Configuration.cmake's "Target selection"
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section for why picking a DIST_TARGET is one or the other, not both.
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Examples:
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scripts/build.sh --preset linux-x64-clang
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scripts/build.sh --preset windows-x64-mingw64 Debug -DBUILD_TESTS=ON
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scripts/build.sh -DBUILD_TESTS=ON
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EOF
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}
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case "${1:-}" in
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-h|--help)
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usage
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exit 0
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;;
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esac
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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cd "$SCRIPT_DIR/.."
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command -v cmake >/dev/null 2>&1 || { echo "error: cmake not found on PATH." >&2; exit 1; }
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if [ "${1:-}" = "--list-presets" ]; then
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exec cmake --list-presets
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fi
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# _pmn_read_config, _pmn_resolve_build_dir, _pmn_record_build_dir.
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source "$SCRIPT_DIR/_common.sh"
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# Prints CMake's own preset listing (already filtered to this OS by each
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# preset's "condition" in CMakePresets.json) to stderr -- used to show the
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# actual options right alongside a preset-related error below, instead of
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# just telling the user to go run --list-presets separately.
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_pmn_show_presets() {
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echo "" >&2
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cmake --list-presets >&2
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}
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# Membership test against that same listing -- $1 matches a real preset
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# name for this OS only if it appears there as a quoted entry (anchored on
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# both quote characters so e.g. "windows-x64-mingw32" can't false-match a
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# check for "windows-x64-mingw3").
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_pmn_known_preset() {
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cmake --list-presets 2>/dev/null | grep -qF "\"$1\""
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}
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_pmn_has_explicit_dist_target() {
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local arg
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for arg in "$@"; do
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case "$arg" in
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-DDIST_TARGET=*) return 0 ;;
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esac
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done
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return 1
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}
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# --preset must come first if given at all -- see Configuration.cmake's
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# and CMakePresets.json's own comments for why this is the recommended
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# way to pick a non-default DIST_TARGET: its toolchain file sets the
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# compiler and the label together, instead of you having to pass both by
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# hand.
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PRESET=""
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case "${1:-}" in
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--preset)
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if [ "$#" -lt 2 ] || [[ "$2" == -* ]]; then
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echo "error: --preset requires a value, e.g. --preset windows-x64-mingw64" >&2
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_pmn_show_presets
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exit 1
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fi
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PRESET="$2"
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shift 2
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;;
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--preset=*)
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PRESET="${1#--preset=}"
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shift
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if [ -z "$PRESET" ]; then
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echo "error: --preset= requires a value, e.g. --preset=windows-x64-mingw64" >&2
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_pmn_show_presets
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exit 1
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fi
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;;
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esac
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if [ -n "$PRESET" ] && ! _pmn_known_preset "$PRESET"; then
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echo "error: '${PRESET}' is not a preset --list-presets knows about for this OS." >&2
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_pmn_show_presets
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exit 1
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fi
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# One build directory per preset (out/build/<preset>; "default" when no
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# preset was given), so switching presets never has to reuse -- or wipe -- a
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# directory configured for another compiler. cmake/BuildDir.cmake owns the
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# layout (Configuration.cmake's BUILD_OUTPUT_DIR); an explicit BUILD_DIR
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# from the environment beats it, and is then also not recorded as "the one
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# built last" (run/install/docs would otherwise be sent to a directory the
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# layout doesn't know about).
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_pmn_record_build=1
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if [ -n "${BUILD_DIR:-}" ]; then
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_pmn_record_build=0
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else
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BUILD_DIR="$(_pmn_resolve_build_dir "${PRESET:-default}")"
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fi
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# If the first remaining argument doesn't start with "-", it's BUILD_TYPE
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# and everything after it is CMAKE_ARGS; otherwise there's no BUILD_TYPE
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# override and every argument is CMAKE_ARGS. Plain bash "$@"/shift, no
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# special-casing needed: unlike Windows cmd.exe (see build.bat), bash
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# never splits a "-DFOO=BAR"-style argument on its own "=".
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if [ "$#" -gt 0 ] && [[ "$1" != -* ]]; then
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BUILD_TYPE="$1"
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shift
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else
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BUILD_TYPE="$(_pmn_read_config DEFAULT_BUILD_TYPE)"
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fi
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CMAKE_ARGS=("$@")
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# ${arr[@]+"${arr[@]}"} rather than a plain "${arr[@]}" wherever an array can be
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# empty: under `set -u`, bash before 4.4 -- which includes the 3.2 that macOS
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# still ships as /bin/bash -- treats expanding an EMPTY array as an unset
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# variable and aborts with "unbound variable".
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if [ -n "$PRESET" ] && _pmn_has_explicit_dist_target ${CMAKE_ARGS[@]+"${CMAKE_ARGS[@]}"}; then
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echo "error: both --preset ${PRESET} and an explicit -DDIST_TARGET=... were given." >&2
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echo " A preset's toolchain already declares DIST_TARGET (and picks the compiler) -- pick one:" >&2
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echo " scripts/build.sh --preset ${PRESET}" >&2
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echo " scripts/build.sh -DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/<target>.cmake" >&2
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echo " See the comment at the top of this script, or Configuration.cmake's" >&2
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echo " \"Target selection\" section, for why these two aren't combined." >&2
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exit 1
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fi
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# Prefer a pinned ninja (fetched by scripts/setup.sh -- see
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# cmake/FetchNinja.cmake) over a system one, same "always the pinned copy"
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# preference as Doxygen. Needed whether or not --preset is used: every
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# preset sets its generator to Ninja but doesn't hardcode which ninja
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# binary to use (that would just be TOOLCACHE_DIR's default duplicated a
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# third time -- see Configuration.cmake) -- CMAKE_MAKE_PROGRAM supplies it
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# either way; only -G Ninja itself is skipped below when a preset already
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# sets the generator.
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TOOLCACHE_DIR="${TOOLCACHE_DIR:-$(_pmn_read_config TOOLCACHE_DIR)}"
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NINJA_BIN=""
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for _candidate in "${TOOLCACHE_DIR}"/ninja-*/ninja; do
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if [ -x "$_candidate" ]; then
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# Must be absolute: CMake invokes CMAKE_MAKE_PROGRAM from several
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# different working directories during its own internal
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# try-compile steps, where a relative path doesn't resolve.
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NINJA_BIN="$(cd "$(dirname "$_candidate")" && pwd)/$(basename "$_candidate")"
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break
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fi
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done
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GENERATOR_ARGS=()
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if [ -n "$NINJA_BIN" ]; then
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echo "==> Using pinned ninja: ${NINJA_BIN}"
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if [ -z "$PRESET" ]; then
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GENERATOR_ARGS=(-G Ninja "-DCMAKE_MAKE_PROGRAM=${NINJA_BIN}")
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else
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GENERATOR_ARGS=("-DCMAKE_MAKE_PROGRAM=${NINJA_BIN}")
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fi
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elif command -v ninja >/dev/null 2>&1; then
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echo "==> Using system ninja: $(command -v ninja)"
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if [ -z "$PRESET" ]; then
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GENERATOR_ARGS=(-G Ninja)
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fi
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else
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if [ -n "$PRESET" ]; then
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echo "warning: ninja not found (no pinned copy, none on PATH) -- the '${PRESET}'" >&2
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echo " preset requires it; configure will likely fail. Run" >&2
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echo " scripts/setup.sh to fetch a pinned ninja, or install ninja" >&2
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echo " yourself." >&2
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else
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echo "warning: ninja not found (no pinned copy, none on PATH) -- falling back to" >&2
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echo " CMake's default generator for this platform. Run scripts/setup.sh" >&2
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echo " to fetch a pinned ninja, or install ninja yourself, for a faster" >&2
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echo " and more consistent build. Continuing without it." >&2
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fi
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fi
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CONFIGURE_ARGS=(-S . -B "${BUILD_DIR}")
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if [ -n "$PRESET" ]; then
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CONFIGURE_ARGS=(--preset "${PRESET}" "${CONFIGURE_ARGS[@]}")
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fi
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echo "==> Configuring (${BUILD_TYPE}) into ${BUILD_DIR}/"
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if [ -n "$PRESET" ]; then
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echo " Preset: ${PRESET}"
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fi
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if [ "${#CMAKE_ARGS[@]}" -gt 0 ]; then
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echo " Extra CMake arguments: ${CMAKE_ARGS[*]}"
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fi
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cmake "${CONFIGURE_ARGS[@]}" ${GENERATOR_ARGS[@]+"${GENERATOR_ARGS[@]}"} -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" ${CMAKE_ARGS[@]+"${CMAKE_ARGS[@]}"}
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# Configure succeeded: this is now the build the other scripts default to.
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if [ "$_pmn_record_build" = 1 ]; then
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_pmn_record_build_dir "${PRESET:-default}"
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fi
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echo "==> Building"
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cmake --build "${BUILD_DIR}"
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echo "==> Done. Run a module with: scripts/run.sh <target-name>"
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