Movimiento de "Cuadrado" veloz en mapa blanco
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Executable
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#!/usr/bin/env bash
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# Run an executable module by its CMake target name (as registered in
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# that module's own CMakeLists.txt), resolved via the manifest that
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# _write_module_manifest() generates at configure time -- so this script
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# never needs updating when modules are added, removed, or renamed.
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#
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# Usage (from the project root):
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# scripts/run.sh [--preset <name>] <target-name> [-- program-args...]
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#
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# --preset <name> Run the build made with that preset (out/build/<name>).
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# Without it: the build scripts/build.sh made last, or
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# the only one that exists. Must come first if given at
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# all; --preset=<name> also works.
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#
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# Examples:
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# scripts/run.sh hello_exe
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# scripts/run.sh --preset linux-x64-clang hello_exe
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# scripts/run.sh farewell_exe -- Ale
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#
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# Set BUILD_DIR to run out of an exact build directory instead.
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#
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# An executable built for another architecture or OS -- linux-arm64-* on an
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# x64 machine, windows-*-mingw* from Linux -- is run under the emulator its
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# toolchain registered (qemu-user, wine) if one was installed when the build
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# was configured; otherwise it can only run on the target itself.
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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cd "$SCRIPT_DIR/.."
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# _pmn_read_config, _pmn_resolve_build_dir, _pmn_record_build_dir.
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source "$SCRIPT_DIR/_common.sh"
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# --preset must come first if given at all, same as scripts/build.sh.
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PRESET=""
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case "${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 linux-x64-gcc" >&2
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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 "$PRESET" ]; then
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echo "error: --preset= requires a value, e.g. --preset=linux-x64-gcc" >&2
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exit 1
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fi
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;;
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esac
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# BUILD_DIR from the environment beats everything; otherwise --preset, else
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# whichever build was made last (see cmake/BuildDir.cmake). Help and the
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# usage message look it up best-effort -- they should still print on a
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# fresh checkout with nothing built yet -- while actually running
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# something needs a real answer, and stops with the reason if there isn't
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# one.
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_pmn_try_build_dir() {
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if [ -z "${BUILD_DIR:-}" ]; then
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BUILD_DIR="$(_pmn_resolve_build_dir "$PRESET" 2>/dev/null || true)"
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fi
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}
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list_targets() {
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local manifest
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[ -n "${BUILD_DIR:-}" ] || return 0
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for manifest in "${BUILD_DIR}"/module_manifest-*.txt; do
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[ -e "$manifest" ] || continue
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cut -d= -f1 "$manifest"
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done | sort -u
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}
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usage() {
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_pmn_try_build_dir
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echo "Usage: $0 [--preset <name>] <cmake-target-name> [-- program-args...]" >&2
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echo >&2
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echo "Available executable targets:" >&2
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local targets
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targets="$(list_targets)"
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if [ -n "$targets" ]; then
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echo "$targets" | sed 's/^/ /' >&2
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else
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echo " (none found -- did you run scripts/build.sh?)" >&2
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fi
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exit 1
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}
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show_help() {
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_pmn_try_build_dir
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echo "Usage: $0 [--preset <name>] <cmake-target-name> [-- program-args...]"
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echo
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echo "Runs an executable module by its CMake target name, resolved via the"
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echo "manifest scripts/build.sh generates at configure time -- see the"
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echo "comment at the top of this script."
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echo
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echo " --preset <name> Run the build made with that preset. Default: the"
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echo " build scripts/build.sh made last."
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echo
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echo "Available executable targets:"
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local targets
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targets="$(list_targets)"
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if [ -n "$targets" ]; then
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echo "$targets" | sed 's/^/ /'
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else
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echo " (none found -- did you run scripts/build.sh?)"
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fi
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echo
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echo "Examples:"
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echo " scripts/run.sh hello_exe"
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echo " scripts/run.sh --preset linux-x64-clang hello_exe"
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echo " scripts/run.sh farewell_exe -- Ale"
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exit 0
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}
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case "${1:-}" in
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-h|--help) show_help ;;
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esac
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[ $# -ge 1 ] || usage
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TARGET_NAME="$1"
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shift
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if [ "${1:-}" = "--" ]; then
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shift
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fi
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if [ -z "${BUILD_DIR:-}" ]; then
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# Explains itself and stops if there's nothing to pick.
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BUILD_DIR="$(_pmn_resolve_build_dir "$PRESET")"
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fi
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MANIFEST=""
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for m in "${BUILD_DIR}"/module_manifest-*.txt; do
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[ -e "$m" ] || continue
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MANIFEST="$m"
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break
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done
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if [ -z "$MANIFEST" ]; then
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echo "error: no build manifest found in '${BUILD_DIR}'. Run scripts/build.sh${PRESET:+ --preset $PRESET} first." >&2
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exit 1
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fi
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BIN_PATH="$(grep "^${TARGET_NAME}=" "$MANIFEST" | head -n1 | cut -d= -f2- || true)"
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if [ -z "$BIN_PATH" ]; then
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echo "error: no executable target named '${TARGET_NAME}' in '${BUILD_DIR}'." >&2
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echo "Available targets:" >&2
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list_targets | sed 's/^/ /' >&2
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exit 1
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fi
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if [ ! -x "$BIN_PATH" ]; then
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echo "error: '${BIN_PATH}' was not found or is not executable. Rebuild with scripts/build.sh${PRESET:+ --preset $PRESET}." >&2
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exit 1
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fi
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# A cross build's toolchain file (cmake/toolchains/) registers an emulator --
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# qemu-user for another CPU, wine for Windows -- as
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# CMAKE_CROSSCOMPILING_EMULATOR when one is installed, which is also what
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# lets ctest run the same binaries. Use it the same way. It's a
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# ";"-separated list (the emulator, then its arguments).
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RUN_PREFIX=()
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if [ -f "${BUILD_DIR}/CMakeCache.txt" ]; then
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_pmn_emulator="$(sed -n 's/^CMAKE_CROSSCOMPILING_EMULATOR:[A-Z]*=//p' "${BUILD_DIR}/CMakeCache.txt")"
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if [ -n "$_pmn_emulator" ]; then
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IFS=';' read -r -a RUN_PREFIX <<< "$_pmn_emulator"
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fi
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fi
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# Which build this came from -- to stderr, so a program's own stdout stays
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# clean to pipe.
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echo "==> Running ${TARGET_NAME} (${BUILD_DIR})${RUN_PREFIX[0]:+ under ${RUN_PREFIX[0]##*/}}" >&2
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# Not `exec`, so a failure to start at all can be explained below.
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_pmn_status=0
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${RUN_PREFIX[@]+"${RUN_PREFIX[@]}"} "$BIN_PATH" "$@" || _pmn_status=$?
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# 126 is the shell's "found it, couldn't execute it" -- which is what running
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# a binary built for another architecture or OS looks like.
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if [ "$_pmn_status" -eq 126 ]; then
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echo "error: '${BIN_PATH}' couldn't be started on this machine. If it is a cross build" >&2
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echo " (built for another CPU or OS), run it on the target, or install an" >&2
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echo " emulator -- qemu-user for another CPU, wine for Windows -- and reconfigure" >&2
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echo " (scripts/build.sh --preset <name>) so the toolchain picks it up." >&2
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fi
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exit "$_pmn_status"
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