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53 lines
1.2 KiB
Bash
Executable File
53 lines
1.2 KiB
Bash
Executable File
#!/bin/bash
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###
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# Copyright 2016 resin.io
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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###
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set -e
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set -u
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if [ "$#" -lt 1 ]; then
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echo "Usage: $0 <dependency...>"
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exit 1
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fi
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RESULT=""
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DEPENDENCIES=""
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for dependency in "$@"; do
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DEPENDENCIES="$DEPENDENCIES $(echo $dependency | cut -d ' ' -f 1)"
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if command -v $dependency 2>/dev/null 1>&2; then
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RESULT=$dependency
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break
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fi
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done
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if [ -z "$RESULT" ]; then
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if [ "$#" -eq 1 ]; then
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echo "Dependency missing:$DEPENDENCIES" 1>&2
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else
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echo "No dependency found from:$DEPENDENCIES" 1>&2
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fi
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exit 1
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fi
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# Only print back if more than one command was passed
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# otherwise if the script passes, its clear that the
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# single command checked is the one that exists.
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if [ "$#" -ne 1 ]; then
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echo $RESULT
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fi
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