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https://git.code.sf.net/p/libpng/code.git
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53d2188fa5
Rename `CI_HOST_ARCH` and `CI_HOST_SYSTEM`, to `CI_BUILD_ARCH` and `CI_BUILD_SYSTEM`, following the nomenclature used by GNU Autotools. Unfortunately, the word "host" has confusingly opposite meanings in CMake (and Bazel, etc.) vs. Autotools (and Meson, etc.) Remove `CI_TARGET_TRIPLET` and `CI_TARGET_ABI` (for now). Introduce the function `ci_expr` as a fast and easy equivalent of `expr >/dev/null`. Rephrase the assertions using an implementation pattern that is more expressive, yet (arguably) just as readable. Remove `ci_assert`. Modify the main functions to display more useful information in case of usage error.
85 lines
2.7 KiB
Bash
85 lines
2.7 KiB
Bash
# Copyright (c) 2019-2023 Cosmin Truta.
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#
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# Use, modification and distribution are subject
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# to the Boost Software License, Version 1.0.
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# See the accompanying file LICENSE_BSL_1_0.txt
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# or visit http://www.boost.org/LICENSE_1_0.txt
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#
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# SPDX-License-Identifier: BSL-1.0
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test -f "$BASH_SOURCE" ||
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echo >&2 "warning: this module requires Bash version 3 or newer"
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test "${#BASH_SOURCE[@]}" -gt 1 ||
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echo >&2 "warning: this module should be sourced from a Bash script"
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# Reset the locale to avoid surprises from locale-dependent commands.
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export LC_ALL=C
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export LANG=C
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export LANGUAGE=C
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# Reset CDPATH to avoid surprises from the "cd" command.
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export CDPATH=""
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# Initialize the global constants CI_SCRIPT_{NAME,DIR} and CI_TOPLEVEL_DIR.
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CI_SCRIPT_NAME="$(basename -- "$0")"
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CI_SCRIPT_DIR="$(cd "$(dirname -- "$0")" && pwd)"
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CI_TOPLEVEL_DIR="$(cd "$(dirname -- "${BASH_SOURCE[0]}")/../.." && pwd)"
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# Initialize the global constants CI_BUILD_{...} for the host build platform.
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CI_BUILD_ARCH="${CI_BUILD_ARCH:-"$(uname -m | tr 'A-Z/\.-' 'a-z____')"}"
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CI_BUILD_SYSTEM="${CI_BUILD_SYSTEM:-"$(uname -s | tr 'A-Z/\.-' 'a-z____')"}"
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# Initialize the global constants CI_TARGET_{...} for the target platform.
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CI_TARGET_ARCH="${CI_TARGET_ARCH:-"$CI_BUILD_ARCH"}"
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CI_TARGET_SYSTEM="${CI_TARGET_SYSTEM:-"$CI_BUILD_SYSTEM"}"
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function ci_info {
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printf >&2 "%s: %s\\n" "$CI_SCRIPT_NAME" "$*"
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}
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function ci_warn {
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printf >&2 "%s: warning: %s\\n" "$CI_SCRIPT_NAME" "$*"
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}
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function ci_err {
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printf >&2 "%s: error: %s\\n" "$CI_SCRIPT_NAME" "$*"
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exit 2
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}
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function ci_err_internal {
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printf >&2 "%s: internal error: %s\\n" "$CI_SCRIPT_NAME" "$*"
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printf >&2 "ABORTED\\n"
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# Exit with the conventional SIGABRT code.
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exit 134
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}
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function ci_expr {
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if [[ ${*:-0} == [0-9] ]]
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then
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# This is the same as in the else-branch below, albeit much faster
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# for our intended use cases.
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return $((!$1))
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else
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# The funny-looking compound command "... && return $? || return $?"
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# allows the execution to continue uninterrupted under "set -e".
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expr >/dev/null "$@" && return $? || return $?
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fi
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}
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function ci_spawn {
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printf >&2 "%s: executing:" "$CI_SCRIPT_NAME"
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printf >&2 " %q" "$@"
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printf >&2 "\\n"
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"$@"
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}
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# Ensure that the initialization is correct.
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[[ $CI_TOPLEVEL_DIR/ci/lib/ci.lib.sh -ef ${BASH_SOURCE[0]} ]] ||
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ci_err_internal "bad or missing \$CI_TOPLEVEL_DIR"
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[[ $CI_SCRIPT_DIR/$CI_SCRIPT_NAME -ef $0 ]] ||
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ci_err_internal "bad or missing \$CI_SCRIPT_DIR/\$CI_SCRIPT_NAME"
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[[ $CI_BUILD_ARCH && $CI_BUILD_SYSTEM ]] ||
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ci_err_internal "missing \$CI_BUILD_ARCH or \$CI_BUILD_SYSTEM"
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[[ $CI_TARGET_ARCH && $CI_TARGET_SYSTEM ]] ||
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ci_err_internal "missing \$CI_TARGET_ARCH or \$CI_TARGET_SYSTEM"
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