add OpenLibraryWorks

2 files changed, 30 insertions, 0 deletions

diff --git a/python/conf/settings.ini b/python/conf/settings.ini
index e79153c..b6d42c9 100644
--- a/python/conf/settings.ini
+++ b/python/conf/settings.ini
@@ -39,3 +39,5 @@ RELEASE_EXPORT_EXPANDED_FILE = "/bigger/citations/release_export_expanded.json.z
 
 # MAG directory.
 MAG = "/magna/data/mag-2020-06-25"
+
+OL_DUMP = "/magna/data/open_library_2021-04-26.jsonl.zst"
diff --git a/python/refcat/tasks.py b/python/refcat/tasks.py
index df2245f..fd1df86 100644
--- a/python/refcat/tasks.py
+++ b/python/refcat/tasks.py
@@ -191,6 +191,10 @@ class WikipediaCitationsMinimalDataset(luigi.ExternalTask, Refcat):
     def output(self):
         return luigi.LocalTarget(path=os.path.join(settings.WIKIPEDIA_CITATIONS, "minimal_dataset.json"))
 
+class OpenLibraryDump(luigi.ExternalTask, Refcat):
+
+    def output(self):
+        return luigi.LocalTarget(path=settings.OL_DUMP, format=Zstd)
 
 # ----8< Derivations
 
@@ -1449,3 +1453,27 @@ class WithISBN(Refcat):
 
     def output(self):
         return luigi.LocalTarget(path=self.path(ext="json.zst"), format=Zstd)
+
+
+class OpenLibraryWorks(Refcat):
+    """
+    Extract just the works.
+    """
+    def requires(self):
+        return OpenLibraryDump()
+
+    def run(self):
+        output = shellout("""
+                          zstdcat -T0 {input} |
+                          parallel -j {n} --block 10M --pipe "jq -rc 'select(.type == \"work\")'" |
+                          zstd -T0 -c > {output}
+                          """,
+                          n=self.n,
+                          tmpdir=self.tmpdir,
+                          input=self.input().path)
+        luigi.LocalTarget(output).move(self.output().path)
+
+    def output(self):
+        return luigi.LocalTarget(path=self.path(ext="json.zst"), format=Zstd)
+
+