git » homepage.git » commit d3ab10e

diff --git a/.gitattributes b/.gitattributes
index 5389347..c1fb152 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,14 @@
 md/TechWorks/media/video/*.mp4 filter=lfs diff=lfs merge=lfs -text
+md/TechWorks/media/audio/*.flac filter=lfs diff=lfs merge=lfs -text
+md/TechWorks/media/audio/*.m4a filter=lfs diff=lfs merge=lfs -text
+md/TechWorks/media/audio/*.mp3 filter=lfs diff=lfs merge=lfs -text
+md/TechWorks/media/audio/*.wav filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.bundle filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.flac filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.m4a filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.mkv filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.mp3 filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.mp4 filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.warc.gz filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.wav filter=lfs diff=lfs merge=lfs -text
+archive/techworks/**/*.webm filter=lfs diff=lfs merge=lfs -text
diff --git a/Containerfile b/Containerfile
index 87fc22f..cd1215f 100644
--- a/Containerfile
+++ b/Containerfile
@@ -22,8 +22,10 @@ RUN rm -f /etc/apt/sources.list /etc/apt/sources.list.d/debian.sources \
        git-lfs \
        openssh-client \
        make \
+       poppler-utils \
        python3 \
        rsync \
+       wget \
     && cmark-gfm --version \
     && ffmpeg -version | head -n 1 \
     && git-lfs version \
diff --git a/Makefile b/Makefile
index 8abeb39..9b6130c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
-.PHONY: all site assets clean deploy help test tree check-git-clean check-output-path check-pushed check-links check-tools \
+.PHONY: all site assets clean deploy help test tree check-git-clean check-output-path check-pushed check-links check-tools archive-audit archive-checksums archive-export \
 	fresh container-image container-build container-check-links \
-	verify-reproducible verify-reproducible-inner
+	container-archive-audit verify-reproducible verify-reproducible-inner
 
 .DELETE_ON_ERROR:
 .NOTPARALLEL:
@@ -75,6 +75,11 @@ container-check-links: container-image
 		--volume "$(CURDIR):/workspace:Z" --workdir /workspace \
 		"$(BUILDER_IMAGE)" make check-links
 
+container-archive-audit: container-image
+	$(CONTAINER_ENGINE) run --rm --userns=keep-id \
+		--volume "$(CURDIR):/workspace:Z" --workdir /workspace \
+		"$(BUILDER_IMAGE)" make archive-audit
+
 verify-reproducible: container-image
 	$(CONTAINER_ENGINE) run --rm --userns=keep-id \
 		--volume "$(CURDIR):/workspace:Z" --workdir /workspace \
@@ -116,11 +121,14 @@ help:
 	@echo '  make container-build       - reproducibly build $(OUT)/ with Podman'
 	@echo '  make verify-reproducible   - compare two isolated container builds'
 	@echo '  make container-check-links - check outbound links with container tools'
+	@echo '  make container-archive-audit - verify preserved TechWorks artifacts'
 	@echo '  make assets                - copy non-Markdown assets into $(OUT)/'
 	@echo '  make                       - build locally (requires cmark-gfm)'
 	@echo '  make deploy                - container-build, then publish from the host'
 	@echo '  make tree                  - count source and generated files'
 	@echo '  make test                  - run standard-library unit tests'
+	@echo '  make archive-audit         - verify preserved TechWorks artifacts'
+	@echo '  make archive-export DEST=  - create a portable preservation copy'
 	@echo '  make clean                 - remove $(OUT)/'
 	@echo '  (deploy requires a clean worktree matching its upstream branch)'
 
@@ -147,3 +155,13 @@ check-pushed:
 
 check-links:
 	@python3 tools/check_links.py
+
+archive-audit:
+	$(PYTHON) tools/archive_techworks.py audit
+
+archive-checksums:
+	$(PYTHON) tools/archive_techworks.py checksums
+
+archive-export:
+	@test -n "$(DEST)" || { echo 'DEST must be an absolute path' >&2; exit 1; }
+	$(PYTHON) tools/archive_techworks.py export --dest "$(DEST)"
diff --git a/README.md b/README.md
index 38b8a6a..e237a26 100644
--- a/README.md
+++ b/README.md
@@ -71,3 +71,5 @@ git lfs fsck
 ```
 
 The DreamHost upstream uses Git LFS's pure-SSH transport. Maintainer remotes must use standard `ssh://user@host/absolute/path` syntax; a colon between the host and absolute path prevents Git LFS from identifying the endpoint.
+
+Preservation-only TechWorks material and its provenance manifest live under `archive/techworks/`, outside the generated website. Verify the corpus with `make container-archive-audit` (or `make archive-audit` when FFmpeg and Poppler are installed locally). To prepare a checksummed recovery directory containing Git history, LFS objects, repository bundles, and preserved files, run `make archive-export DEST=/absolute/path`.
diff --git a/archive/techworks/README.md b/archive/techworks/README.md
new file mode 100644
index 0000000..bdf391e
--- /dev/null
+++ b/archive/techworks/README.md
@@ -0,0 +1,17 @@
+# TechWorks preservation data
+
+This directory stores preservation-only artifacts and provenance records. It is
+not copied into the generated website. Visitor-facing downloads remain under
+`md/TechWorks/`.
+
+`manifest.tsv` contains one row per artifact. A preserved row records the exact
+source URL, local path, retrieval time, byte count, SHA-256 digest, and whether
+the artifact is intended for the public site. Rows without retrievable files
+record why only metadata or a missing-item disposition remains.
+
+Run `make archive-audit` after adding or replacing an artifact. Generate a
+portable recovery copy with an explicit destination:
+
+```sh
+make archive-export DEST=/absolute/path/to/empty-directory
+```
diff --git a/archive/techworks/SHA256SUMS b/archive/techworks/SHA256SUMS
new file mode 100644
index 0000000..ba52d9c
--- /dev/null
+++ b/archive/techworks/SHA256SUMS
@@ -0,0 +1,68 @@
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diff --git a/archive/techworks/manifest.tsv b/archive/techworks/manifest.tsv
new file mode 100644
index 0000000..443717c
--- /dev/null
+++ b/archive/techworks/manifest.tsv
@@ -0,0 +1,69 @@
+work_id	artifact_id	title	kind	source_url	local_path	retrieved_utc	sha256	bytes	visibility	status	notes
+2015-04-20_ClojureWestBoot	2015-04-20_clojurewestboot-pdf	2015-04-20_ClojureWestBoot.pdf	pdf	repository-preserved-source	md/TechWorks/2015-04-20_ClojureWestBoot.pdf	2026-08-08T00:00:00Z	a4f289f053abcdb02ac7ff433f4f1aacf279e4470c999cb5e292c31a1f28f4e8	604933	public	preserved	
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+oscon2012-clojure	oscon2012-clojure-5ac233f-tar-gz	oscon2012-clojure-5ac233f.tar.gz	git-snapshot	https://github.com/alandipert/oscon2012-clojure	md/TechWorks/oscon2012-clojure-5ac233f.tar.gz	2026-08-08T00:00:00Z	37eb2a8885fae16fc6f45b7910a272d9564246cf140ecd72db756fbdc3efa852	380357	public	preserved	
+wombat	wombat-dbd34f4-tar-gz	wombat-dbd34f4.tar.gz	git-snapshot	https://github.com/alandipert/wombat	md/TechWorks/wombat-dbd34f4.tar.gz	2026-08-08T00:00:00Z	4fa2b18b4df657cc4fe0b1dcc61fac3a179bb7da636cf90c06de98b38efe7e6f	11907	public	preserved	
diff --git a/tests/test_archive_techworks.py b/tests/test_archive_techworks.py
new file mode 100644
index 0000000..3fe4d8f
--- /dev/null
+++ b/tests/test_archive_techworks.py
@@ -0,0 +1,77 @@
+import csv
+import hashlib
+from pathlib import Path
+import tempfile
+import unittest
+
+import archive_techworks
+
+
+class ArchiveTechWorksTests(unittest.TestCase):
+    def write_manifest(self, root, rows):
+        path = root / "archive" / "techworks" / "manifest.tsv"
+        path.parent.mkdir(parents=True, exist_ok=True)
+        with path.open("w", encoding="utf-8", newline="") as stream:
+            writer = csv.DictWriter(
+                stream,
+                fieldnames=archive_techworks.FIELDS,
+                dialect="excel-tab",
+            )
+            writer.writeheader()
+            writer.writerows(rows)
+        return path
+
+    def test_audit_accepts_a_complete_preserved_artifact(self):
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            artifact = root / "md" / "TechWorks" / "article.html"
+            artifact.parent.mkdir(parents=True)
+            artifact.write_text("preserved", encoding="utf-8")
+            row = {
+                "work_id": "work",
+                "artifact_id": "work-page",
+                "title": "Work page",
+                "kind": "html",
+                "source_url": "https://example.com/work",
+                "local_path": "md/TechWorks/article.html",
+                "retrieved_utc": "2026-08-09T00:00:00Z",
+                "sha256": hashlib.sha256(b"preserved").hexdigest(),
+                "bytes": str(len(b"preserved")),
+                "visibility": "public",
+                "status": "preserved",
+                "notes": "",
+            }
+            manifest = self.write_manifest(root, [row])
+            rows = archive_techworks.audit(root, manifest, verify_formats=False)
+            self.assertEqual(rows[0]["artifact_id"], "work-page")
+
+    def test_audit_rejects_an_unmanifested_corpus_file(self):
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            artifact = root / "archive" / "techworks" / "orphan.bin"
+            artifact.parent.mkdir(parents=True)
+            artifact.write_bytes(b"orphan")
+            manifest = self.write_manifest(root, [])
+            with self.assertRaisesRegex(
+                archive_techworks.AuditError, "unmanifested corpus file"
+            ):
+                archive_techworks.audit(root, manifest, verify_formats=False)
+
+    def test_export_destination_must_be_absolute_and_empty(self):
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            with self.assertRaisesRegex(archive_techworks.AuditError, "absolute"):
+                archive_techworks.safe_destination(root, Path("relative"))
+            occupied = root.parent / f"{root.name}-occupied"
+            occupied.mkdir()
+            try:
+                (occupied / "file").write_text("data", encoding="utf-8")
+                with self.assertRaisesRegex(archive_techworks.AuditError, "not empty"):
+                    archive_techworks.safe_destination(root, occupied)
+            finally:
+                (occupied / "file").unlink()
+                occupied.rmdir()
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tools/archive_techworks.py b/tools/archive_techworks.py
new file mode 100644
index 0000000..99816d4
--- /dev/null
+++ b/tools/archive_techworks.py
@@ -0,0 +1,255 @@
+#!/usr/bin/env python3
+"""Audit and export the repository's TechWorks preservation corpus."""
+
+from __future__ import annotations
+
+import argparse
+import csv
+import hashlib
+from pathlib import Path
+import shutil
+import subprocess
+import sys
+
+
+FIELDS = (
+    "work_id", "artifact_id", "title", "kind", "source_url", "local_path",
+    "retrieved_utc", "sha256", "bytes", "visibility", "status", "notes",
+)
+STATUSES = {"preserved", "metadata-only", "missing", "rights-limited"}
+VISIBILITIES = {"public", "repository-only"}
+CONTROL_PATHS = {
+    "archive/techworks/README.md",
+    "archive/techworks/manifest.tsv",
+    "archive/techworks/SHA256SUMS",
+}
+
+
+class AuditError(Exception):
+    pass
+
+
+def sha256(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        for block in iter(lambda: stream.read(1024 * 1024), b""):
+            digest.update(block)
+    return digest.hexdigest()
+
+
+def run(command: list[str], cwd: Path) -> None:
+    subprocess.run(command, cwd=cwd, check=True, stdout=subprocess.DEVNULL)
+
+
+def load_manifest(path: Path) -> list[dict[str, str]]:
+    with path.open(encoding="utf-8", newline="") as stream:
+        reader = csv.DictReader(stream, dialect="excel-tab")
+        if tuple(reader.fieldnames or ()) != FIELDS:
+            raise AuditError(
+                f"{path}: expected fields {FIELDS}, got {tuple(reader.fieldnames or ())}"
+            )
+        return list(reader)
+
+
+def check_artifact(path: Path, kind: str, root: Path) -> None:
+    if kind in {"audio", "video"}:
+        run([
+            "ffprobe", "-v", "error", "-show_entries",
+            "format=duration:stream=codec_type,codec_name,width,height",
+            "-of", "default=noprint_wrappers=1", str(path),
+        ], root)
+    elif kind == "pdf":
+        run(["pdfinfo", str(path)], root)
+    elif kind == "git-bundle":
+        run(["git", "bundle", "verify", str(path)], root)
+    elif kind == "warc":
+        run(["gzip", "--test", str(path)], root)
+
+
+def discover_corpus_files(root: Path) -> set[str]:
+    paths: set[str] = set()
+    for directory in (root / "md" / "TechWorks", root / "archive" / "techworks"):
+        if not directory.exists():
+            continue
+        for path in directory.rglob("*"):
+            if path.is_file():
+                relative = path.relative_to(root).as_posix()
+                if relative not in CONTROL_PATHS:
+                    paths.add(relative)
+    return paths
+
+
+def audit(root: Path, manifest_path: Path, verify_formats: bool = True) -> list[dict[str, str]]:
+    rows = load_manifest(manifest_path)
+    errors: list[str] = []
+    artifact_ids: set[str] = set()
+    preserved_paths: set[str] = set()
+
+    for line_number, row in enumerate(rows, start=2):
+        prefix = f"{manifest_path}:{line_number}"
+        artifact_id = row["artifact_id"]
+        if not artifact_id:
+            errors.append(f"{prefix}: artifact_id is empty")
+        elif artifact_id in artifact_ids:
+            errors.append(f"{prefix}: duplicate artifact_id {artifact_id}")
+        artifact_ids.add(artifact_id)
+
+        if row["status"] not in STATUSES:
+            errors.append(f"{prefix}: invalid status {row['status']!r}")
+        if row["visibility"] not in VISIBILITIES:
+            errors.append(f"{prefix}: invalid visibility {row['visibility']!r}")
+
+        local_path = row["local_path"]
+        if row["status"] != "preserved":
+            if local_path or row["sha256"] or row["bytes"]:
+                errors.append(f"{prefix}: non-preserved row contains local file data")
+            continue
+
+        if not local_path:
+            errors.append(f"{prefix}: preserved row has no local_path")
+            continue
+        path = root / local_path
+        preserved_paths.add(Path(local_path).as_posix())
+        if path.is_symlink():
+            errors.append(f"{prefix}: symbolic links are not allowed: {local_path}")
+            continue
+        if not path.is_file():
+            errors.append(f"{prefix}: missing file: {local_path}")
+            continue
+        if row["visibility"] == "public" and not local_path.startswith("md/TechWorks/"):
+            errors.append(f"{prefix}: public artifact is outside md/TechWorks: {local_path}")
+        try:
+            expected_size = int(row["bytes"])
+        except ValueError:
+            errors.append(f"{prefix}: invalid byte count {row['bytes']!r}")
+        else:
+            if path.stat().st_size != expected_size:
+                errors.append(
+                    f"{prefix}: size mismatch for {local_path}: expected "
+                    f"{expected_size}, got {path.stat().st_size}"
+                )
+        actual_hash = sha256(path)
+        if actual_hash != row["sha256"]:
+            errors.append(
+                f"{prefix}: SHA-256 mismatch for {local_path}: expected "
+                f"{row['sha256']}, got {actual_hash}"
+            )
+        if verify_formats:
+            try:
+                check_artifact(path, row["kind"], root)
+            except (OSError, subprocess.CalledProcessError) as error:
+                errors.append(f"{prefix}: format verification failed for {local_path}: {error}")
+
+    errors.extend(
+        f"unmanifested corpus file: {path}"
+        for path in sorted(discover_corpus_files(root) - preserved_paths)
+    )
+    if errors:
+        raise AuditError("\n".join(errors))
+    return rows
+
+
+def write_checksums(rows: list[dict[str, str]], destination: Path) -> None:
+    lines = [
+        f"{row['sha256']}  {row['local_path']}"
+        for row in rows if row["status"] == "preserved"
+    ]
+    destination.write_text("\n".join(sorted(lines)) + "\n", encoding="utf-8")
+
+
+def safe_destination(root: Path, destination: Path) -> Path:
+    if not destination.is_absolute():
+        raise AuditError("export destination must be an absolute path")
+    resolved = destination.resolve()
+    if resolved in {Path("/"), root.resolve(), root.resolve().parent}:
+        raise AuditError(f"unsafe export destination: {resolved}")
+    if resolved.exists() and any(resolved.iterdir()):
+        raise AuditError(f"export destination is not empty: {resolved}")
+    return resolved
+
+
+def export(root: Path, manifest_path: Path, destination: Path) -> None:
+    rows = audit(root, manifest_path)
+    destination = safe_destination(root, destination)
+    destination.mkdir(parents=True, exist_ok=True)
+    bundle_dir = destination / "git"
+    files_dir = destination / "files"
+    lfs_dir = destination / "lfs" / "objects"
+    bundle_dir.mkdir()
+    files_dir.mkdir()
+
+    run(["git", "bundle", "create", str(bundle_dir / "homepage.bundle"), "--all"], root)
+    run(["git", "lfs", "fetch", "--all"], root)
+    source_lfs = root / ".git" / "lfs" / "objects"
+    if source_lfs.exists():
+        shutil.copytree(source_lfs, lfs_dir, dirs_exist_ok=True)
+
+    for row in rows:
+        if row["status"] != "preserved":
+            continue
+        source = root / row["local_path"]
+        target = files_dir / row["local_path"]
+        target.parent.mkdir(parents=True, exist_ok=True)
+        shutil.copy2(source, target)
+
+    shutil.copy2(manifest_path, destination / "manifest.tsv")
+    (destination / "RESTORE.md").write_text(
+        """# TechWorks portable preservation export
+
+Verify this export with `sha256sum --check SHA256SUMS`.
+
+Restore Git history with `git clone git/homepage.bundle homepage`. Copy
+`lfs/objects/` into `homepage/.git/lfs/objects/`, then check out the desired
+revision. The `files/` tree is a directly browsable copy of every preserved
+artifact in the manifest.
+""",
+        encoding="utf-8",
+    )
+    checksum_paths = [
+        path for path in destination.rglob("*")
+        if path.is_file() and path.name != "SHA256SUMS"
+    ]
+    (destination / "SHA256SUMS").write_text(
+        "\n".join(sorted(
+            f"{sha256(path)}  {path.relative_to(destination).as_posix()}"
+            for path in checksum_paths
+        )) + "\n",
+        encoding="utf-8",
+    )
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--root", type=Path, default=Path.cwd())
+    parser.add_argument("--manifest", type=Path, default=Path("archive/techworks/manifest.tsv"))
+    subparsers = parser.add_subparsers(dest="command", required=True)
+    audit_parser = subparsers.add_parser("audit")
+    audit_parser.add_argument("--skip-format-checks", action="store_true")
+    subparsers.add_parser("checksums")
+    export_parser = subparsers.add_parser("export")
+    export_parser.add_argument("--dest", type=Path, required=True)
+    return parser.parse_args()
+
+
+def main() -> int:
+    args = parse_args()
+    root = args.root.resolve()
+    manifest = args.manifest if args.manifest.is_absolute() else root / args.manifest
+    try:
+        if args.command == "audit":
+            rows = audit(root, manifest, not args.skip_format_checks)
+            print(f"TechWorks archive OK: {len(rows)} manifest rows")
+        elif args.command == "checksums":
+            rows = audit(root, manifest, verify_formats=False)
+            write_checksums(rows, root / "archive/techworks/SHA256SUMS")
+        elif args.command == "export":
+            export(root, manifest, args.dest)
+            print(f"TechWorks export created at {args.dest}")
+    except (AuditError, OSError, subprocess.CalledProcessError) as error:
+        print(error, file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())