Add libxslt package

packages/libxslt/project.bri

@@ -0,0 +1,51 @@
+import * as std from "std";
+import python from "python";
+import libxml2 from "libxml2";
+
+export const project = {
+  name: "libxslt",
+  version: "1.1.42",
+};
+
+const source = Brioche.download(
+  `https://download.gnome.org/sources/libxslt/1.1/libxslt-${project.version}.tar.xz`,
+)
+  .unarchive("tar", "xz")
+  .peel();
+
+export default function (): std.Recipe<std.Directory> {
+  let libxslt = std.runBash`
+    ./configure --prefix=/
+    make
+    make install DESTDIR="$BRIOCHE_OUTPUT"
+  `
+    .workDir(source)
+    .dependencies(std.toolchain(), python(), libxml2())
+    .toDirectory();
+
+  libxslt = makePkgConfigPathsRelative(libxslt);
+
+  libxslt = std.setEnv(libxslt, {
+    CPATH: { append: [{ path: "include" }] },
+    LIBRARY_PATH: { append: [{ path: "lib" }] },
+    PKG_CONFIG_PATH: { append: [{ path: "lib/pkgconfig" }] },
+  });
+
+  return libxslt;
+}
+
+// TODO: Figure out where to move this, this is copied from `std`
+function makePkgConfigPathsRelative(
+  recipe: std.AsyncRecipe<std.Directory>,
+): std.Recipe<std.Directory> {
+  // Replaces things that look like absolute paths in pkg-config files with
+  // relative paths (using the `${pcfiledir}` variable)
+  return std.runBash`
+    find "$BRIOCHE_OUTPUT"/lib/pkgconfig -name '*.pc' -type f -print0 \
+      | while IFS= read -r -d $'\\0' file; do
+        sed -i 's|=/|=\${pcfiledir}/../../|' "$file"
+      done
+  `
+    .outputScaffold(recipe)
+    .toDirectory();
+}