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Diffstat (limited to 'lib/parseini.in')
-rw-r--r-- | lib/parseini.in | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/lib/parseini.in b/lib/parseini.in new file mode 100644 index 0000000..6f56d42 --- /dev/null +++ b/lib/parseini.in @@ -0,0 +1,130 @@ +# +# parseini --- parses 'ini' style configuration files. +# +# Usage: +# awk -f parseini S=<section> P=<param> <ini file> +# +# if section is an empty string, then we use the default section +# +# example ini file: +# +# fruit = apple +# fruit = pear +# multiline = this is a multiline \ +# parameter +# +# # this is a comment +# +# [colors] +# red = yes +# green = no +# blue = maybe +# +# [ocean] +# fish = red +# fish = blue +# +# example usage: +# > awk -f parseini S=ocean P=fish testfile.ini +# would return: +# red +# blue +# + +BEGIN { + readlines = 1 + implied = 1 +} + +# remove lines starting with #, but not #! +/^#[^!]/ {next} + +# skip blank +/^[ \r\t]*$/ {next} + +# we want to read the lines of the matched section +# and disable for other sections +/^\[.+\][ \r\t]*$/ { + continueline = 0 + if (S && implied) { + nline = 0 + implied = 0 + } + if (S && match($0, "^\\[" S "\\][ \n]*")) { + # we found the section, so start reading. + readlines = 1 + } + else { + # no section, so stop reading lines + if (readlines) readlines = 0 + } + next +} + +# when reading, store lines. + +{ + if (!readlines) next + line[nline++] = $0 + if ($0 ~ /\\[ \r\t]*$/) + continueline = 1 + else + continueline = 0 +} + +# process the read lines lines, matching parameters + +END { + # if section is set but implied is still true + # then we never found the section, so use everything + if (S && implied) { + nline = 0 + } + + # if have P then find P in read lines and get values + if (P) { + MATCH = "^[ \r\t]*" P "[ \r\t]*=" + continueline = 0 + for (x = 0; x < nline; ++x) { + v = line[x] + if (continueline) { + sub(/[ \r\t]+$/, "", v) + if (v ~ /\\$/) { + v = substr(v, 1, length(v)-1) + sub(/[ \r\t]+$/, "", v) + } + if (v) value[nvalue++] = v + } + else if (v ~ MATCH) { + sub(MATCH, "", v) + sub(/^[ \r\t]+/, "", v) + sub(/[ \r\t]+$/, "", v) + if (v ~ /\\$/) { + continueline = 1 + v = substr(v, 1, length(v)-1) + sub(/[ \r\t]+$/, "", v) + } + if (v) value[nvalue++] = v + } + } + # copy parameter definition to output array + nline = nvalue + for (x = 0; x < nvalue; ++x) + line[x] = value[x] + } + + # trim all leading & trailing whitespace; + # except for leading whitespace in continuation lines, + + for (x = 0; x < nline; ++x) { + sub(/^[ \r\t]+/, "", line[x]) + sub(/[ \r\t]+$/, "", line[x]) + } + + # output the final result + for (x = 0; x < nline; ++x) + print line[x] + + if (nline) exit 0 + else exit 1 +} |