stdlib/tools/make/lib/help/assert.mk at develop · JavaTypedScript/stdlib

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# @license Apache-2.0

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# RULES #

# Asserts that a `Makefile` variable is set.

# ## Notes

# - The rule uses the following format:

# ```bash

# $ make assert.<variable>

# ```

# - If a variable is **not** set, the recipe exits with a non-zero exit code.

# @example

# make assert.CXX

assert.%:

$(QUIET) if [[ "${${*}}" = "" ]]; then \

echo ''; \

echo "Error: invalid operation. Must set the environment variable: ${*}."; \

echo ''; \

exit 1; \

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