133 lines
3.6 KiB
Bash
Executable file
133 lines
3.6 KiB
Bash
Executable file
#!/bin/bash
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#
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# Copyright (c) 2016 Józef Sokołowski
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# Distributed under the MIT License
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#
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# For most current version checkout repository:
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# https://github.com/qzb/is.sh
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#
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is() {
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if [ "$1" == "--help" ]; then
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cat << EOF
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Conditions:
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is equal VALUE_A VALUE_B
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is matching REGEXP VALUE
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is substring VALUE_A VALUE_B
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is empty VALUE
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is number VALUE
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is gt NUMBER_A NUMBER_B
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is lt NUMBER_A NUMBER_B
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is ge NUMBER_A NUMBER_B
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is le NUMBER_A NUMBER_B
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is file PATH
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is dir PATH
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is link PATH
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is existing PATH
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is readable PATH
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is writeable PATH
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is executable PATH
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is available COMMAND
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is older PATH_A PATH_B
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is newer PATH_A PATH_B
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is true VALUE
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is false VALUE
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Negation:
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is not equal VALUE_A VALUE_B
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Optional article:
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is not a number VALUE
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is an existing PATH
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is the file PATH
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EOF
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exit
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fi
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if [ "$1" == "--version" ]; then
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echo "is.sh 1.1.0"
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exit
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fi
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local condition="$1"
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local value_a="$2"
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local value_b="$3"
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if [ "$condition" == "not" ]; then
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shift 1
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! is "${@}"
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return $?
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fi
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if [ "$condition" == "a" ] || [ "$condition" == "an" ] || [ "$condition" == "the" ]; then
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shift 1
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is "${@}"
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return $?
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fi
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case "$condition" in
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file)
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[ -f "$value_a" ]; return $?;;
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dir|directory)
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[ -d "$value_a" ]; return $?;;
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link|symlink)
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[ -L "$value_a" ]; return $?;;
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existent|existing|exist|exists)
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[ -e "$value_a" ]; return $?;;
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readable)
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[ -r "$value_a" ]; return $?;;
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writeable)
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[ -w "$value_a" ]; return $?;;
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executable)
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[ -x "$value_a" ]; return $?;;
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available|installed)
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which "$value_a"; return $?;;
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empty)
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[ -z "$value_a" ]; return $?;;
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number)
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echo "$value_a" | grep -E '^[0-9]+(\.[0-9]+)?$'; return $?;;
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older)
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[ "$value_a" -ot "$value_b" ]; return $?;;
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newer)
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[ "$value_a" -nt "$value_b" ]; return $?;;
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gt)
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is not a number "$value_a" && return 1;
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is not a number "$value_b" && return 1;
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awk "BEGIN {exit $value_a > $value_b ? 0 : 1}"; return $?;;
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lt)
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is not a number "$value_a" && return 1;
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is not a number "$value_b" && return 1;
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awk "BEGIN {exit $value_a < $value_b ? 0 : 1}"; return $?;;
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ge)
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is not a number "$value_a" && return 1;
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is not a number "$value_b" && return 1;
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awk "BEGIN {exit $value_a >= $value_b ? 0 : 1}"; return $?;;
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le)
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is not a number "$value_a" && return 1;
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is not a number "$value_b" && return 1;
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awk "BEGIN {exit $value_a <= $value_b ? 0 : 1}"; return $?;;
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eq|equal)
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[ "$value_a" = "$value_b" ] && return 0;
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is not a number "$value_a" && return 1;
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is not a number "$value_b" && return 1;
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awk "BEGIN {exit $value_a == $value_b ? 0 : 1}"; return $?;;
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match|matching)
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echo "$value_b" | grep -xE "$value_a"; return $?;;
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substr|substring)
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echo "$value_b" | grep -F "$value_a"; return $?;;
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true)
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[ "$value_a" == true ] || [ "$value_a" == 0 ]; return $?;;
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false)
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[ "$value_a" != true ] && [ "$value_a" != 0 ]; return $?;;
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esac > /dev/null
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return 1
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}
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if is not equal "${BASH_SOURCE[0]}" "$0"; then
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export -f is
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else
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is "${@}"
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exit $?
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fi
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