56 lines
1.1 KiB
Bash
Executable File
56 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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###############################
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# exposes library functions to modify properties in a property
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#
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# TODO function append_property
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#
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###############################
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set -euo pipefail
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cnt_lines() {
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local FILE=$1
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wc -l < "$FILE"
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}
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write_prop() {
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local PROPERTY=$1
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local VALUE=$2
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local FILE=$3
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# uncomment below to help debug calls to set_property
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#echo "setting property $PROPERTY to value $VALUE in $FILE"
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echo >> "$FILE"
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echo "${PROPERTY}=${VALUE}" >> "$FILE"
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}
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set_property() {
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local PROPERTY=$1
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local VALUE=$2
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local FILE=$3
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local REGEXP="^${PROPERTY//\./\\.}[ \\t]*="
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if grep -q "$REGEXP" "$FILE"; then
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# delete line of specified property
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LINE_COUNT=$(cnt_lines "$FILE")
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if [[ "$OSTYPE" == "darwin"* ]]; then
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sed -i '' "/${REGEXP}/d" "$FILE"
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else
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sed -i "/${REGEXP}/d" "$FILE"
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fi
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# add property if at least one line deleted
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local NEW_LINE_COUNT=$(cnt_lines "$FILE")
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if [[ $LINE_COUNT -gt $NEW_LINE_COUNT ]]; then
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write_prop "$PROPERTY" "$VALUE" "$FILE"
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fi
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else
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write_prop "$PROPERTY" "$VALUE" "$FILE"
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fi
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}
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