From 74e75ed54d4075c1ffeeba22513a3a2edd25fee5 Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Tue, 22 Jun 2021 12:24:35 +0100
Subject: rescribe: Add an embedded tessdata

---
 cmd/rescribe/main.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/cmd/rescribe/main.go b/cmd/rescribe/main.go
index 51a33b2..3325282 100644
--- a/cmd/rescribe/main.go
+++ b/cmd/rescribe/main.go
@@ -43,6 +43,9 @@ Note that embedded Tesseract includes these training files:
 - rescribev8_fast.traineddata (Latin historic printing)
 `
 
+//go:embed tessdata.20210622.zip
+var tessdatazip []byte
+
 const QueueTimeoutSecs = 2 * 60
 const PauseBetweenChecks = 1 * time.Second
 const LogSaveTime = 1 * time.Minute
@@ -188,6 +191,23 @@ func main() {
 			tessCommand = filepath.Join(tessdir, "tesseract.exe")
 		// TODO: add linux and osx
 		}
+
+		tessdatadir := filepath.Join(tessdir, "tessdata")
+		err = os.MkdirAll(tessdatadir, 0755)
+		if err != nil {
+			log.Fatalln("Error setting up tessdata directory:", err)
+		}
+		err = unpackZip(tessdatazip, tessdatadir)
+		if err != nil {
+			log.Fatalln("Error unpacking embedded tessdata zip:", err)
+		}
+
+		// if trainingPath doesn't exist, set it to the embedded training instead
+		_, err = os.Stat(trainingPath)
+		if !os.IsExist(err) {
+			trainingPath = filepath.Base(trainingPath)
+			trainingPath = filepath.Join(tessdatadir, trainingPath)
+		}
 	}
 
 	f, err := os.Open(trainingPath)
-- 
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