hadrian: Substitute LIBRARY_*_VERSION variables

This teaches Hadrian to substitute the `LIBRARY_*_VERSION` variables
in `libraries/prologue.txt`, fixing #22714.

Fixes #22714.

2 files changed, 18 insertions, 2 deletions

diff --git a/hadrian/src/Rules/Documentation.hs b/hadrian/src/Rules/Documentation.hs
index 3c31823889..27aece61d2 100644
--- a/hadrian/src/Rules/Documentation.hs
+++ b/hadrian/src/Rules/Documentation.hs
@@ -78,6 +78,8 @@ needDocDeps = do
             , ghci
             , libiserv
             , compiler
+            , ghcHeap
+            , templateHaskell
             ]
 
     need templatedCabalFiles
@@ -102,8 +104,6 @@ documentationRules = do
     "docs" ~> do
         root <- buildRoot
 
-        needDocDeps
-
         doctargets <- ghcDocs =<< flavour
         let html     = htmlRoot -/- "index.html" -- also implies "docs-haddock"
             archives = map pathArchive docPaths
@@ -203,6 +203,9 @@ buildSphinxHtml path = do
     root -/- htmlRoot -/- path -/- "index.html" %> \file -> do
         let dest = takeDirectory file
             rstFilesDir = pathPath path
+
+        needDocDeps
+
         rstFiles <- getDirectoryFiles rstFilesDir ["**/*.rst"]
         need (map (rstFilesDir -/-) rstFiles)
         build $ target docContext (Sphinx HtmlMode) [pathPath path] [dest]
@@ -314,6 +317,9 @@ buildSphinxPdf :: FilePath -> Rules ()
 buildSphinxPdf path = do
     root <- buildRootRules
     root -/- pdfRoot -/- path <.> "pdf" %> \file -> do
+
+        needDocDeps
+
         withTempDir $ \dir -> do
             let rstFilesDir = pathPath path
             rstFiles <- getDirectoryFiles rstFilesDir ["**/*.rst"]
diff --git a/hadrian/src/Rules/Generate.hs b/hadrian/src/Rules/Generate.hs
index f17ff0eb21..a37d69d7d1 100644
--- a/hadrian/src/Rules/Generate.hs
+++ b/hadrian/src/Rules/Generate.hs
@@ -13,6 +13,8 @@ import Hadrian.Oracles.TextFile (lookupSystemConfig)
 import Oracles.Flag
 import Oracles.ModuleFiles
 import Oracles.Setting
+import Hadrian.Haskell.Cabal.Type (PackageData(version))
+import Hadrian.Oracles.Cabal (readPackageData)
 import Packages
 import Rules.Libffi
 import Settings
@@ -303,6 +305,13 @@ rtsCabalFlags = mconcat
   where
     flag = interpolateCabalFlag
 
+packageVersions :: Interpolations
+packageVersions = foldMap f [ base, ghcPrim, ghc, cabal, templateHaskell, ghcCompact, array ]
+  where
+    f :: Package -> Interpolations
+    f pkg = interpolateVar var $ show . version <$> readPackageData pkg
+      where var = "LIBRARY_" <> pkgName pkg <> "_VERSION"
+
 templateRule :: FilePath -> Interpolations -> Rules ()
 templateRule outPath interps = do
     outPath %> \_ -> do
@@ -328,6 +337,7 @@ templateRules = do
   templateRule "utils/ghc-pkg/ghc-pkg.cabal" $ projectVersion
   templateRule "libraries/libiserv/libiserv.cabal" $ projectVersion
   templateRule "libraries/template-haskell/template-haskell.cabal" $ projectVersion
+  templateRule "libraries/prologue.txt" $ packageVersions
 
 
 -- Generators