fstencode(1)

💖 fstencode — the manual, but make it cute 💖

okay bestie, gather round, because today we're talking about fstencode(1) and it's honestly giving ✨ main character energy ✨

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🌸 NAME 🌸

fstencode — encode transducer labels or weights 🦋

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🎀 SYNOPSIS 🎀

fstencode [OPTIONS] in.fst codex [out.fst]

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💅 DESCRIPTION 💅

So basically? It encodes transducer labels and/or weights. That's it, that's the whole vibe. You hand it an FST and a codex and it goes to work. no cap. 🔥

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✨ OPTIONS ✨

real talk first, bestie: boolean options are chill like that — they take either true or false as a value, or if you just... don't say anything, they implicitly mean true. slay 💖

• --decode[=BOOLEAN] — Decode labels and/or weights. Default: false.
• --encode_labels[=BOOLEAN] — Encode output labels. Default: false.
• --encode_reuse[=BOOLEAN] — Reuse an existing codex. Default: false.
• --encode_weights[=BOOLEAN] — Encode weights. Default: false.
• --fst_align[=BOOLEAN] — Write FST data aligned where appropriate. Default: false.
• --fst_compat_symbols[=BOOLEAN] — Require symbol tables to match when appropriate. Default: true.
• --fst_default_cache_gc[=BOOLEAN] — Enable garbage collection of cache. Default: true.
• --fst_default_cache_gc_limit=N — Set the cache byte size that triggers garbage collection. Default: 1048576.
• --fst_error_fatal[=BOOLEAN] — If true, FST errors are fatal. Otherwise, returned objects are flagged as bad. For example, FSTs are returned with the kError property set to true, and FST weights set so that Member() returns false. Default: true.
• --fst_field_separator=STRING — Set the characters used as a separator between printed fields. Default: " ".
• --fst_read_mode=STRING — Set the default file reading mode for mappable files, either "read" or "map". Default: "read".
• --fst_verify_properties[=BOOLEAN] — Verify fst properties queried by TestProperties. Default: false.
• --fst_weight_parentheses=STRING — Set the characters enclosing the first weight of a printed composite weight (e.g., pair weight, tuple weight, and derived classes) to ensure proper I/O of nested composite weights. Must have size 0 (none) or 2 (open and close parenthesis). Default: no parentheses.
• --fst_weight_separator=CHARACTER — Set the character separator between printed composite weights. Default: comma.
• --help[=BOOLEAN] — Show usage information. Default: false.
• --helpshort[=BOOLEAN] — Show brief usage information. Default: false.
• --save_relabel_ipairs=FILENAME — Save input relabel pairs to file. Default: do not save.
• --save_relabel_opairs=FILENAME — Save output relabel pairs to file. Default: do not save.
• --tmpdir=PATHNAME — Set the temporary directory to use. Default: /tmp.
• --v[=N] — Set the verbosity level. Default: 0.

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🫶 SEE ALSO 🫶

the whole friend group came through, periodt 👑:

fstarcsort(1), fstclosure(1), fstcompile(1), fstcompose(1), fstcompress(1), fstconcat(1), fstconnect(1), fstconvert(1), fstdeterminize(1), fstdifference(1), fstdisambiguate(1), fstdraw(1), fstepsnormalize(1), fstequal(1), fstequivalent(1), fstinfo(1), fstintersect(1), fstinvert(1), fstisomorphic(1), fstlinear(1), fstloglinearapply(1), fstmap(1), fstminimize(1), fstprint(1), fstproject(1), fstprune(1), fstpush(1), fstrandgen(1), fstrelabel(1), fstreplace(1), fstreverse(1), fstreweight(1), fstrmepsilon(1), fstshortestdistance(1), fstshortestpath(1), fstsymbols(1), fstsynchronize(1), fsttopsort(1), fstunion(1)

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and that's the tea, bestie 💜 this whole thing is living in OpenFst 1.8.5, dated Mar 2026 — stay iconic, drink water, and encode responsibly 🎀✨🦋