From f7e607258e83ba0f47f839fa3649446fc90aa427 Mon Sep 17 00:00:00 2001
From: Philipp Baumann <baumann-philipp@proton.me>
Date: Mon, 11 Sep 2023 12:42:15 +0200
Subject: [PATCH] deal with `tex_pkgs = NULL`

---
 R/find_rev.R       | 3 +++
 dev/build_envs.Rmd | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/R/find_rev.R b/R/find_rev.R
index 0986efa4..f33e9e22 100644
--- a/R/find_rev.R
+++ b/R/find_rev.R
@@ -413,12 +413,15 @@ rPackages)
   generate_tex_pkgs <- function(tex_pkgs) {
 
     tex_pkgs <- paste(tex_pkgs, collapse = ' ')
+    
+    if (!is.null(tex_pkgs)) {
 
     sprintf('tex = (pkgs.texlive.combine {
   inherit (pkgs.texlive) scheme-basic %s;
 });
 ',
 tex_pkgs)
+    }
   }
 
   flag_tex_pkgs <- if(is.null(tex_pkgs)){
diff --git a/dev/build_envs.Rmd b/dev/build_envs.Rmd
index e6cdd498..b6e4c041 100644
--- a/dev/build_envs.Rmd
+++ b/dev/build_envs.Rmd
@@ -497,12 +497,15 @@ rPackages)
   generate_tex_pkgs <- function(tex_pkgs) {
 
     tex_pkgs <- paste(tex_pkgs, collapse = ' ')
+    
+    if (!is.null(tex_pkgs)) {
 
     sprintf('tex = (pkgs.texlive.combine {
   inherit (pkgs.texlive) scheme-basic %s;
 });
 ',
 tex_pkgs)
+    }
   }
 
   flag_tex_pkgs <- if(is.null(tex_pkgs)){