Add debug logging for migration diff.

db_migrate.nimble

@@ -1,7 +1,7 @@
 # Package
 
 bin           = @["db_migrate"]
-version       = "0.3.0"
+version       = "0.3.1"
 author        = "Jonathan Bernard"
 description   = "Simple tool to handle database migrations."
 license       = "BSD"

src/main/nim/db_migrate.nim

@@ -89,6 +89,9 @@ proc diffMigrations*(
     run: seq[string],
     notRun, missing: seq[MigrationEntry] ] =
 
+  debug "diffMigrations: inspecting database and configured directories " &
+    "for migrations"
+
   # Query the database to find out what migrations have been run.
   var migrationsRun = initHashSet[string]()
 
@@ -98,7 +101,9 @@ proc diffMigrations*(
   # Inspect the filesystem to see what migrations are available.
   var migrationsAvailable = newTable[string, MigrationEntry]()
   for sqlDir in config.sqlDirs:
+    debug "Looking in " & sqlDir
     for filePath in walkFiles(joinPath(sqlDir, "*.sql")):
+      debug "Saw migration file: " & filePath
       var migrationName = filePath.extractFilename
       migrationName.removeSuffix("-up.sql")
       migrationName.removeSuffix("-down.sql")
@@ -125,11 +130,18 @@ proc diffMigrations*(
       missingMigrations.add(migrationsNotRun)
       migrationsNotRun = newSeq[MigrationEntry]()
 
-  return (available: migrationsAvailable,
+  result = (available: migrationsAvailable,
           run: toSeq(migrationsRun.items).sorted(system.cmp),
           notRun: migrationsNotRun,
           missing: missingMigrations)
 
+  debug "diffMigration: Results" &
+    "\n\tavailable: " & $toSeq(result[0].keys) &
+    "\n\trun:       " & $result[1] &
+    "\n\tnotRun:    " & $(result[2].mapIt(it.name)) &
+    "\n\tmissing:   " & $(result[3].mapIt(it.name))
+
+
 proc readStatements*(filename: string): seq[SqlQuery] =
   result = @[]
   var stmt: string = ""