From 32c611186f6dcf552c7b73ca3f86480f97461fbe Mon Sep 17 00:00:00 2001
From: rm-dr <96270320+rm-dr@users.noreply.github.com>
Date: Fri, 6 Mar 2026 16:26:09 -0800
Subject: [PATCH] Add pdf extractors

---
 Cargo.lock                                    | 443 ++++++++++++++++--
 Cargo.toml                                    |   1 +
 crates/pile-dataset/Cargo.toml                |   1 +
 crates/pile-dataset/src/extract/flac.rs       |   5 +
 crates/pile-dataset/src/extract/map.rs        |   2 +-
 crates/pile-dataset/src/extract/mod.rs        |   8 +
 crates/pile-dataset/src/extract/pdf/mod.rs    |  61 +++
 .../pile-dataset/src/extract/pdf/pdf_meta.rs  |  98 ++++
 .../pile-dataset/src/extract/pdf/pdf_text.rs  |  79 ++++
 9 files changed, 669 insertions(+), 29 deletions(-)
 create mode 100644 crates/pile-dataset/src/extract/pdf/mod.rs
 create mode 100644 crates/pile-dataset/src/extract/pdf/pdf_meta.rs
 create mode 100644 crates/pile-dataset/src/extract/pdf/pdf_text.rs

diff --git a/Cargo.lock b/Cargo.lock
index e64ccd2..2306592 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,23 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "adler32"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
+
+[[package]]
+name = "aes"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
+dependencies = [
+ "cfg-if",
+ "cipher",
+ "cpufeatures",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.4"
@@ -111,7 +128,7 @@ checksum = "9035ad2d096bed7955a320ee7e2230574d28fd3c3a0f186cbea1ff3c7eed5dbb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -155,6 +172,15 @@ dependencies = [
  "cpufeatures",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.11.0"
@@ -164,6 +190,15 @@ dependencies = [
  "hybrid-array",
 ]
 
+[[package]]
+name = "block-padding"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8894febbff9f758034a5b8e12d87918f56dfc64a8e1fe757d65e29041538d93"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bon"
 version = "3.9.0"
@@ -186,7 +221,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -207,6 +242,15 @@ version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b35204fbdc0b3f4446b89fc1ac2cf84a8a68971995d0bf2e925ec7cd960f9cb3"
 
+[[package]]
+name = "cbc"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26b52a9543ae338f279b96b0b9fed9c8093744685043739079ce85cd58f289a6"
+dependencies = [
+ "cipher",
+]
+
 [[package]]
 name = "cc"
 version = "1.2.56"
@@ -244,6 +288,16 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
+dependencies = [
+ "crypto-common 0.1.7",
+ "inout",
+]
+
 [[package]]
 name = "clap"
 version = "4.5.60"
@@ -275,7 +329,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -321,6 +375,15 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "core2"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b49ba7ef1ad6107f8824dbe97de947cbaac53c44e7f9756a1fba0d37c1eec505"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.17"
@@ -379,6 +442,16 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
 
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "crypto-common"
 version = "0.2.0"
@@ -408,7 +481,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -419,7 +492,42 @@ checksum = "ac3984ec7bd6cfa798e62b4a642426a5be0e68f9401cfc2a01e3fa9ea2fcdb8d"
 dependencies = [
  "darling_core",
  "quote",
- "syn",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "dary_heap"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06d2e3287df1c007e74221c49ca10a95d557349e54b3a75dc2fb14712c751f04"
+
+[[package]]
+name = "datasize"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e65c07d59e45d77a8bda53458c24a828893a99ac6cdd9c84111e09176ab739a2"
+dependencies = [
+ "datasize_derive",
+]
+
+[[package]]
+name = "datasize_derive"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "613e4ee15899913285b7612004bbd490abd605be7b11d35afada5902fb6b91d5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "deflate"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c86f7e25f518f4b81808a2cf1c50996a61f5c2eb394b2393bd87f2a4780a432f"
+dependencies = [
+ "adler32",
 ]
 
 [[package]]
@@ -432,15 +540,25 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer 0.10.4",
+ "crypto-common 0.1.7",
+]
+
 [[package]]
 name = "digest"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8bf3682cdec91817be507e4aa104314898b95b84d74f3d43882210101a545b6"
 dependencies = [
- "block-buffer",
+ "block-buffer 0.11.0",
  "const-oid",
- "crypto-common",
+ "crypto-common 0.2.0",
 ]
 
 [[package]]
@@ -489,6 +607,26 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
+[[package]]
+name = "fax"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f05de7d48f37cd6730705cbca900770cab77a89f413d23e100ad7fad7795a0ab"
+dependencies = [
+ "fax_derive",
+]
+
+[[package]]
+name = "fax_derive"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0aca10fb742cb43f9e7bb8467c91aa9bcb8e3ffbc6a6f7389bb93ffc920577d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
@@ -507,6 +645,12 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
 
+[[package]]
+name = "foldhash"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77ce24cb58228fbb8aa041425bb1050850ac19177686ea6e0f41a70416f56fdb"
+
 [[package]]
 name = "fs4"
 version = "0.13.1"
@@ -531,7 +675,7 @@ checksum = "e835b70203e41293343137df5c0664546da5745f82ec9b84d40be8336958447b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -553,6 +697,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -589,6 +743,18 @@ dependencies = [
  "wasip3",
 ]
 
+[[package]]
+name = "globalcache"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f07c02868ebe3ffab0c273801b815f19a9fc05743b5b9da971449dd40604fe30"
+dependencies = [
+ "async-trait",
+ "rustc-hash",
+ "tuple",
+ "web-time",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.15.5"
@@ -597,7 +763,7 @@ checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
 dependencies = [
  "allocator-api2",
  "equivalent",
- "foldhash",
+ "foldhash 0.1.5",
 ]
 
 [[package]]
@@ -605,6 +771,11 @@ name = "hashbrown"
 version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
+dependencies = [
+ "allocator-api2",
+ "equivalent",
+ "foldhash 0.2.0",
+]
 
 [[package]]
 name = "heck"
@@ -699,12 +870,40 @@ dependencies = [
  "web-time",
 ]
 
+[[package]]
+name = "inout"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
+dependencies = [
+ "block-padding",
+ "generic-array",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
 
+[[package]]
+name = "istring"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "875cc6fb9aecbc1a9bd736f2d18b12e0756b4c80c5e35e28262154abcb077a39"
+dependencies = [
+ "datasize",
+]
+
+[[package]]
+name = "itertools"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "413ee7dfc52ee1a4949ceeb7dbc8a33f2d6c088194d9f922fb8318faf1f01186"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.14.0"
@@ -730,6 +929,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "jpeg-decoder"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00810f1d8b74be64b13dbf3db89ac67740615d6c891f0e7b6179326533011a07"
+
 [[package]]
 name = "js-sys"
 version = "0.3.83"
@@ -764,6 +969,30 @@ version = "0.2.182"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6800badb6cb2082ffd7b6a67e6125bb39f18782f793520caee8cb8846be06112"
 
+[[package]]
+name = "libflate"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3248b8d211bd23a104a42d81b4fa8bb8ac4a3b75e7a43d85d2c9ccb6179cd74"
+dependencies = [
+ "adler32",
+ "core2",
+ "crc32fast",
+ "dary_heap",
+ "libflate_lz77",
+]
+
+[[package]]
+name = "libflate_lz77"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a599cb10a9cd92b1300debcef28da8f70b935ec937f44fcd1b70a7c986a11c5c"
+dependencies = [
+ "core2",
+ "hashbrown 0.16.1",
+ "rle-decode-fast",
+]
+
 [[package]]
 name = "libm"
 version = "0.2.16"
@@ -815,6 +1044,12 @@ dependencies = [
  "regex-automata",
 ]
 
+[[package]]
+name = "md5"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "490cc448043f947bae3cbee9c203358d62dbee0db12107a74be5c30ccfd09771"
+
 [[package]]
 name = "measure_time"
 version = "0.9.0"
@@ -959,6 +1194,45 @@ version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
 
+[[package]]
+name = "pdf"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de084796ae1744b0ae6b2b1e9368ed87bd43043ca410363edb72155ea68245db"
+dependencies = [
+ "aes",
+ "bitflags",
+ "cbc",
+ "datasize",
+ "deflate",
+ "fax",
+ "globalcache",
+ "indexmap",
+ "istring",
+ "itertools 0.13.0",
+ "jpeg-decoder",
+ "libflate",
+ "log",
+ "md5",
+ "once_cell",
+ "pdf_derive",
+ "sha2 0.10.9",
+ "snafu",
+ "stringprep",
+ "weezl",
+]
+
+[[package]]
+name = "pdf_derive"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d66198aa8cbc8fb36b61c32b50fc2ba11cf70cf177c7a36b15f9444a2fce0267"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "pile"
 version = "0.0.1"
@@ -996,7 +1270,8 @@ version = "0.0.1"
 dependencies = [
  "blake3",
  "chrono",
- "itertools",
+ "itertools 0.14.0",
+ "pdf",
  "pile-config",
  "pile-flac",
  "pile-toolbox",
@@ -1016,10 +1291,10 @@ name = "pile-flac"
 version = "0.0.1"
 dependencies = [
  "base64",
- "itertools",
+ "itertools 0.14.0",
  "mime",
  "paste",
- "sha2",
+ "sha2 0.11.0-rc.5",
  "smartstring",
  "strum",
  "thiserror",
@@ -1073,7 +1348,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
 dependencies = [
  "proc-macro2",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -1198,6 +1473,12 @@ version = "0.8.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
 
+[[package]]
+name = "rle-decode-fast"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3582f63211428f83597b51b2ddb88e2a91a9d52d12831f9d08f5e624e8977422"
+
 [[package]]
 name = "rust-stemmers"
 version = "1.2.0"
@@ -1281,7 +1562,7 @@ checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -1306,6 +1587,17 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest 0.10.7",
+]
+
 [[package]]
 name = "sha2"
 version = "0.11.0-rc.5"
@@ -1314,7 +1606,7 @@ checksum = "7c5f3b1e2dc8aad28310d8410bd4d7e180eca65fca176c52ab00d364475d0024"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "digest",
+ "digest 0.11.0",
 ]
 
 [[package]]
@@ -1384,6 +1676,27 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "snafu"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e84b3f4eacbf3a1ce05eac6763b4d629d60cbc94d632e4092c54ade71f1e1a2"
+dependencies = [
+ "snafu-derive",
+]
+
+[[package]]
+name = "snafu-derive"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1c97747dbf44bb1ca44a561ece23508e99cb592e862f22222dcf42f51d1e451"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "socket2"
 version = "0.6.2"
@@ -1406,6 +1719,17 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "stringprep"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b4df3d392d81bd458a8a621b8bffbd2302a12ffe288a9d931670948749463b1"
+dependencies = [
+ "unicode-bidi",
+ "unicode-normalization",
+ "unicode-properties",
+]
+
 [[package]]
 name = "strsim"
 version = "0.11.1"
@@ -1430,7 +1754,18 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -1465,7 +1800,7 @@ dependencies = [
  "fs4",
  "htmlescape",
  "hyperloglogplus",
- "itertools",
+ "itertools 0.14.0",
  "levenshtein_automata",
  "log",
  "lru",
@@ -1513,7 +1848,7 @@ checksum = "8b628488ae936c83e92b5c4056833054ca56f76c0e616aee8339e24ac89119cd"
 dependencies = [
  "downcast-rs",
  "fastdivide",
- "itertools",
+ "itertools 0.14.0",
  "serde",
  "tantivy-bitpacker",
  "tantivy-common",
@@ -1563,7 +1898,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8292095d1a8a2c2b36380ec455f910ab52dde516af36321af332c93f20ab7d5"
 dependencies = [
  "futures-util",
- "itertools",
+ "itertools 0.14.0",
  "tantivy-bitpacker",
  "tantivy-common",
  "tantivy-fst",
@@ -1620,7 +1955,7 @@ checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -1663,6 +1998,21 @@ dependencies = [
  "time-core",
 ]
 
+[[package]]
+name = "tinyvec"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa5fdc3bce6191a1dbc8c02d5c8bffcf557bafa17c124c5264a458f1b0613fa"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
+
 [[package]]
 name = "tokio"
 version = "1.49.0"
@@ -1688,7 +2038,7 @@ checksum = "af407857209536a95c8e56f8231ef2c2e2aff839b22e07a1ffcbc617e9db9fa5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -1762,7 +2112,7 @@ checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -1829,18 +2179,49 @@ dependencies = [
  "tracing-serde",
 ]
 
+[[package]]
+name = "tuple"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9bb9f6bd73479481158ba8ee3edf17aca93354623d13f02e96a2014fdbc1c37e"
+dependencies = [
+ "num-traits",
+ "serde",
+]
+
 [[package]]
 name = "typenum"
 version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
 
+[[package]]
+name = "unicode-bidi"
+version = "0.3.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c1cb5db39152898a79168971543b1cb5020dff7fe43c8dc468b0885f5e29df5"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
+[[package]]
+name = "unicode-normalization"
+version = "0.1.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fd4f6878c9cb28d874b009da9e8d183b5abc80117c40bbd187a1fde336be6e8"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
+name = "unicode-properties"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7df058c713841ad818f1dc5d3fd88063241cc61f49f5fbea4b951e8cf5a8d71d"
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.12.0"
@@ -1988,7 +2369,7 @@ dependencies = [
  "bumpalo",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
  "wasm-bindgen-shared",
 ]
 
@@ -2045,6 +2426,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "weezl"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a28ac98ddc8b9274cb41bb4d9d4d5c425b6020c50c46f25559911905610b4a88"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -2097,7 +2484,7 @@ checksum = "053e2e040ab57b9dc951b72c264860db7eb3b0200ba345b4e4c3b14f67855ddf"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -2108,7 +2495,7 @@ checksum = "3f316c4a2570ba26bbec722032c4099d8c8bc095efccdc15688708623367e358"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -2336,7 +2723,7 @@ dependencies = [
  "heck",
  "indexmap",
  "prettyplease",
- "syn",
+ "syn 2.0.117",
  "wasm-metadata",
  "wit-bindgen-core",
  "wit-component",
@@ -2352,7 +2739,7 @@ dependencies = [
  "prettyplease",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
  "wit-bindgen-core",
  "wit-bindgen-rust",
 ]
@@ -2411,7 +2798,7 @@ checksum = "0c15e1b46eff7c6c91195752e0eeed8ef040e391cdece7c25376957d5f15df22"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index f137f73..34b1856 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -90,6 +90,7 @@ toml = "1.0.3"
 toml_edit = "0.25.4"
 sha2 = "0.11.0-rc.5"
 blake3 = "1.8.3"
+pdf = "0.10.0"
 
 # Misc helpers
 thiserror = "2.0.18"
diff --git a/crates/pile-dataset/Cargo.toml b/crates/pile-dataset/Cargo.toml
index b65142a..c87f45d 100644
--- a/crates/pile-dataset/Cargo.toml
+++ b/crates/pile-dataset/Cargo.toml
@@ -24,3 +24,4 @@ rayon = { workspace = true }
 smartstring = { workspace = true }
 blake3 = { workspace = true }
 toml_edit = { workspace = true }
+pdf = { workspace = true }
diff --git a/crates/pile-dataset/src/extract/flac.rs b/crates/pile-dataset/src/extract/flac.rs
index 65c7ee4..223ea48 100644
--- a/crates/pile-dataset/src/extract/flac.rs
+++ b/crates/pile-dataset/src/extract/flac.rs
@@ -22,6 +22,11 @@ impl<'a> FlacExtractor<'a> {
 			return Ok(x);
 		}
 
+		// If this isn't a flac file, ignore it.
+		if self.item.path.extension().map(|x| x.to_str()).flatten() != Some("flac") {
+			return Ok(self.output.get_or_init(|| HashMap::new()));
+		}
+
 		let file = File::open(&self.item.path)?;
 		let reader = FlacReader::new(BufReader::new(file));
 
diff --git a/crates/pile-dataset/src/extract/map.rs b/crates/pile-dataset/src/extract/map.rs
index e774c52..6f68e65 100644
--- a/crates/pile-dataset/src/extract/map.rs
+++ b/crates/pile-dataset/src/extract/map.rs
@@ -4,7 +4,7 @@ use std::collections::HashMap;
 use crate::{Item, PileValue, extract::Extractor};
 
 pub struct MapExtractor<'a, I: Item> {
-	pub(super) inner: HashMap<Label, PileValue<'a, I>>,
+	pub(crate) inner: HashMap<Label, PileValue<'a, I>>,
 }
 
 impl<I: Item> Extractor<I> for MapExtractor<'_, I> {
diff --git a/crates/pile-dataset/src/extract/mod.rs b/crates/pile-dataset/src/extract/mod.rs
index ee3aa9d..fa3ac7c 100644
--- a/crates/pile-dataset/src/extract/mod.rs
+++ b/crates/pile-dataset/src/extract/mod.rs
@@ -7,6 +7,9 @@ pub use flac::*;
 mod fs;
 pub use fs::*;
 
+mod pdf;
+pub use pdf::*;
+
 mod sidecar;
 pub use sidecar::*;
 
@@ -49,6 +52,10 @@ impl<'a> MetaExtractor<'a, crate::FileItem> {
 					Label::new("fs").unwrap(),
 					crate::PileValue::Extractor(Rc::new(FsExtractor::new(item))),
 				),
+				(
+					Label::new("pdf").unwrap(),
+					crate::PileValue::Extractor(Rc::new(PdfExtractor::new(item))),
+				),
 				(
 					Label::new("sidecar").unwrap(),
 					crate::PileValue::Extractor(Rc::new(SidecarExtractor::new(item))),
@@ -73,6 +80,7 @@ impl Extractor<crate::FileItem> for MetaExtractor<'_, crate::FileItem> {
 		return Ok(vec![
 			Label::new("flac").unwrap(),
 			Label::new("fs").unwrap(),
+			Label::new("pdf").unwrap(),
 			Label::new("sidecar").unwrap(),
 		]);
 	}
diff --git a/crates/pile-dataset/src/extract/pdf/mod.rs b/crates/pile-dataset/src/extract/pdf/mod.rs
new file mode 100644
index 0000000..21f6d0c
--- /dev/null
+++ b/crates/pile-dataset/src/extract/pdf/mod.rs
@@ -0,0 +1,61 @@
+use pile_config::Label;
+use std::{collections::HashMap, rc::Rc};
+
+mod pdf_meta;
+pub use pdf_meta::*;
+
+mod pdf_text;
+pub use pdf_text::*;
+
+use crate::{
+	FileItem, PileValue,
+	extract::{Extractor, MapExtractor},
+};
+
+pub struct PdfExtractor<'a> {
+	inner: MapExtractor<'a, FileItem>,
+}
+
+impl<'a> PdfExtractor<'a> {
+	#[expect(clippy::unwrap_used)]
+	pub fn new(item: &'a FileItem) -> Self {
+		let inner = MapExtractor {
+			inner: HashMap::from([
+				(
+					Label::new("text").unwrap(),
+					PileValue::Extractor(Rc::new(PdfTextExtractor::new(item))),
+				),
+				(
+					Label::new("meta").unwrap(),
+					PileValue::Extractor(Rc::new(PdfMetaExtractor::new(item))),
+				),
+			]),
+		};
+
+		Self { inner }
+	}
+}
+
+impl Extractor<FileItem> for PdfExtractor<'_> {
+	fn field<'a>(
+		&'a self,
+		name: &pile_config::Label,
+	) -> Result<Option<&'a PileValue<'a, FileItem>>, std::io::Error> {
+		if name.as_str() == "text" {
+			match self.inner.inner.get(name).unwrap() {
+				PileValue::Extractor(x) => return x.field(name),
+				_ => unreachable!(),
+			};
+		}
+
+		self.inner.field(name)
+	}
+
+	#[expect(clippy::unwrap_used)]
+	fn fields(&self) -> Result<Vec<Label>, std::io::Error> {
+		Ok(vec![
+			Label::new("text").unwrap(),
+			Label::new("meta").unwrap(),
+		])
+	}
+}
diff --git a/crates/pile-dataset/src/extract/pdf/pdf_meta.rs b/crates/pile-dataset/src/extract/pdf/pdf_meta.rs
new file mode 100644
index 0000000..6a6e4aa
--- /dev/null
+++ b/crates/pile-dataset/src/extract/pdf/pdf_meta.rs
@@ -0,0 +1,98 @@
+use pdf::file::FileOptions;
+use pdf::primitive::{Date, TimeRel};
+use pile_config::Label;
+use std::{collections::HashMap, sync::OnceLock};
+
+use crate::{FileItem, PileValue, extract::Extractor};
+
+pub struct PdfMetaExtractor<'a> {
+	item: &'a FileItem,
+	output: OnceLock<HashMap<Label, PileValue<'a, FileItem>>>,
+}
+
+impl<'a> PdfMetaExtractor<'a> {
+	pub fn new(item: &'a FileItem) -> Self {
+		Self {
+			item,
+			output: OnceLock::new(),
+		}
+	}
+
+	fn get_inner(&self) -> Result<&HashMap<Label, PileValue<'a, FileItem>>, std::io::Error> {
+		if let Some(x) = self.output.get() {
+			return Ok(x);
+		}
+
+		let file = FileOptions::cached()
+			.open(&self.item.path)
+			.map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e.to_string()))?;
+
+		let mut output: HashMap<Label, PileValue<'a, FileItem>> = HashMap::new();
+
+		if let Some(info) = &file.trailer.info_dict {
+			let fields: &[(&str, Option<&_>)] = &[
+				("title", info.title.as_ref()),
+				("author", info.author.as_ref()),
+				("subject", info.subject.as_ref()),
+				("keywords", info.keywords.as_ref()),
+				("creator", info.creator.as_ref()),
+				("producer", info.producer.as_ref()),
+			];
+
+			#[expect(clippy::unwrap_used)]
+			for (key, val) in fields {
+				let label = Label::new(*key).unwrap();
+				let value = match val {
+					Some(s) => PileValue::String(s.to_string_lossy().into()),
+					None => PileValue::Null,
+				};
+				output.insert(label, value);
+			}
+
+			#[expect(clippy::unwrap_used)]
+			{
+				output.insert(
+					Label::new("creation_date").unwrap(),
+					info.creation_date
+						.as_ref()
+						.map(|d| PileValue::String(format_date(d).into()))
+						.unwrap_or(PileValue::Null),
+				);
+				output.insert(
+					Label::new("mod_date").unwrap(),
+					info.mod_date
+						.as_ref()
+						.map(|d| PileValue::String(format_date(d).into()))
+						.unwrap_or(PileValue::Null),
+				);
+			}
+		}
+
+		return Ok(self.output.get_or_init(|| output));
+	}
+}
+
+fn format_date(d: &Date) -> String {
+	let tz = match d.rel {
+		TimeRel::Universal => "Z".to_owned(),
+		TimeRel::Later => format!("+{:02}:{:02}", d.tz_hour, d.tz_minute),
+		TimeRel::Earlier => format!("-{:02}:{:02}", d.tz_hour, d.tz_minute),
+	};
+	format!(
+		"{:04}-{:02}-{:02}T{:02}:{:02}:{:02}{}",
+		d.year, d.month, d.day, d.hour, d.minute, d.second, tz
+	)
+}
+
+impl Extractor<FileItem> for PdfMetaExtractor<'_> {
+	fn field<'a>(
+		&'a self,
+		name: &Label,
+	) -> Result<Option<&'a PileValue<'a, FileItem>>, std::io::Error> {
+		Ok(self.get_inner()?.get(name))
+	}
+
+	fn fields(&self) -> Result<Vec<Label>, std::io::Error> {
+		Ok(self.get_inner()?.keys().cloned().collect())
+	}
+}
diff --git a/crates/pile-dataset/src/extract/pdf/pdf_text.rs b/crates/pile-dataset/src/extract/pdf/pdf_text.rs
new file mode 100644
index 0000000..31a0a4d
--- /dev/null
+++ b/crates/pile-dataset/src/extract/pdf/pdf_text.rs
@@ -0,0 +1,79 @@
+use pdf::content::{Op, TextDrawAdjusted};
+use pdf::file::FileOptions;
+use pile_config::Label;
+use std::{collections::HashMap, sync::OnceLock};
+
+use crate::{FileItem, PileValue, extract::Extractor};
+
+pub struct PdfTextExtractor<'a> {
+	item: &'a FileItem,
+	output: OnceLock<HashMap<Label, PileValue<'a, FileItem>>>,
+}
+
+impl<'a> PdfTextExtractor<'a> {
+	pub fn new(item: &'a FileItem) -> Self {
+		Self {
+			item,
+			output: OnceLock::new(),
+		}
+	}
+
+	fn get_inner(&self) -> Result<&HashMap<Label, PileValue<'a, FileItem>>, std::io::Error> {
+		if let Some(x) = self.output.get() {
+			return Ok(x);
+		}
+
+		let file = FileOptions::cached()
+			.open(&self.item.path)
+			.map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e.to_string()))?;
+
+		let mut text_parts: Vec<String> = Vec::new();
+
+		for page in file.pages() {
+			let page = page
+				.map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e.to_string()))?;
+
+			if let Some(content) = &page.contents {
+				let ops = content.operations(&file.resolver()).map_err(|e| {
+					std::io::Error::new(std::io::ErrorKind::InvalidData, e.to_string())
+				})?;
+
+				for op in ops {
+					match op {
+						Op::TextDraw { text } => {
+							text_parts.push(text.to_string_lossy());
+						}
+						Op::TextDrawAdjusted { array } => {
+							for item in array {
+								if let TextDrawAdjusted::Text(text) = item {
+									text_parts.push(text.to_string_lossy());
+								}
+							}
+						}
+						_ => {}
+					}
+				}
+			}
+		}
+
+		let text = text_parts.join(" ");
+
+		#[expect(clippy::unwrap_used)]
+		let output = HashMap::from([(Label::new("text").unwrap(), PileValue::String(text.into()))]);
+
+		return Ok(self.output.get_or_init(|| output));
+	}
+}
+
+impl Extractor<FileItem> for PdfTextExtractor<'_> {
+	fn field<'a>(
+		&'a self,
+		name: &Label,
+	) -> Result<Option<&'a PileValue<'a, FileItem>>, std::io::Error> {
+		Ok(self.get_inner()?.get(name))
+	}
+
+	fn fields(&self) -> Result<Vec<Label>, std::io::Error> {
+		Ok(self.get_inner()?.keys().cloned().collect())
+	}
+}