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March 20, 2026 15:48
Most tools and functions now allow to explicitly specify a format for input and output. On input, the format is usually detected, but for some cases, this is not possible (e.g. DEF). So you can specify the format attached to the file name in square brackets: e.g. file.defok[def] "def" is the intended suffix, "defok" is the given one. On output, the same is possible, specifically in strmxor and strmclip: strmxor a.gds b.gds out.xor[oas]
The way to specify them is through the following environment variables: $KLAYOUT_LEF_FORMAT - LEF suffixes (default: "*.lef *.LEF *.lef.gz *.LEF.gz") $KLAYOUT_DEF_FORMAT - DEF suffixes (default: "*.def *.DEF *.def.gz *.DEF.gz") The string is a space-separated list of simple match pattern. Only "*.xyz"-style pattern are allowed currently.
…_LEF_FORMAT environment variables.
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Whats the reasoning to use an environment variable and not an internal klayout variable that gets saved in klayoutrc ? |
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That's because it should apply to strm* tools as well, right? They don't have klayoutrc. |
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The solution consists of a number of features:
Two environment variables to specify a list of formats for LEF and DEF:
In addition, you can add the desired format in form of a "virtual suffix" in square brackets to the input and output files on strmxor, strmclip and klayout:
reads a DEF file called "file.defok", and
will produce a file called "ab.xor" in OASIS format.