74 lines
2.2 KiB
Bash
Executable File
74 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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set -e
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argv0="$0"
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argv1="$1"
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argv2="$2"
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# check usage
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if ! test -n "$1"; then
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printf "Usage: %s [OPTIONS] [TABLE.KEY[INDEX]] [FILE]\n" "$0" 1>&2
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exit 64 # sysexits(3) EX_USAGE
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fi
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# test if input has a period
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if test -n "$(printf "%s\n" "$argv1" | sed -n '/.*\..*/p')"; then
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# cut out everything beyond the first period for TABLE
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TABLE=$(printf "%s\n" "$argv1" | sed -n 's/\..*//p')
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# cut out everything before the first period for KEY
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KEY=$(printf "%s\n" "$argv1" | sed -n 's/^[^.]*\.//p')
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! test -n "$KEY" &&\
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printf "%s: No key specified\n" "$argv0" 1>&2 &&\
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exit 65 # sysexits(3) EX_DATAERR
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else
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printf "%s: No key specified\n" "$argv0" 1>&2
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exit 65 # sysexits(3) EX_DATAERR
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fi
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# remove array index from KEY
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KEY=$(printf "%s\n" "$KEY" | sed 's/\[.*\]//g')
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# set ARR to the array index
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ARR=$(printf "%s\n" "$argv1" | sed -n 's/.\+\[//p' | tr -d ']')
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# test if argument 2 is a file or not
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if test -e "$argv2"; then
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# set TOML to the text from the file
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TOML=$(sed 's/[^"#]#\+.*//g' <"$argv2" | sed 's/^#.*//g' )
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else
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# set TOML to the text from stdin
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TOML=$(printf "%s\n" "$argv2" | sed 's/[^"#]#\+.*//g')
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fi
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if test -n "$TABLE"; then
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KEYS=$(printf "%s\n" "$TOML" |\
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# output only lines between TABLE and the next table
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awk "/^\[$TABLE\]/{flag=1; next} /^\[/{flag=0} flag" - )
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else
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KEYS=$(printf "%s\n" "$TOML" |\
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# output only lines before the first table
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awk '1;/^\[/{exit}' - | sed -n '/^[^[]/p')
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fi
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# set VAL to the parsed KEYS list
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VAL=$(printf "%s\n" "$KEYS" |\
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# remove the key from the string and delineate arrays, removing
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# brackets, trailing commas, and leading spaces
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sed -n "s/$KEY *= *//p" | sed 's/", "/ /g' | tr -d '[]"' |\
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sed 's/, *$//g' | sed 's/^ \+//g' | sed 's/ \+$//g')
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# test if ARR is set; if it is, then we have an array index to grab
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if test -n "$ARR"; then
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# change the line delineator to newlines for parsing and output the result
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printf "%s\n" "$VAL" | sed 's/ /\n/g' | head -n "$ARR" |\
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tail -n 1
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elif ! test -n "$VAL"; then
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printf "%s: %s: No such key or table\n" "$argv0" "$argv1" 1>&2
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exit 65 # sysexits(3) EX_DATAERR
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else
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printf "%s\n" "$VAL"
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fi
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exit 0
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