I tried to use the new rmd_subdir option in the _bookdown.yml by setting a list of subdirectories. I copied all files except the index.Rmd of a freshly created bookdown project in a folder called content. The following setting in the _bookdown.yml does work
rmd_subdir: = yes
However when I change the _bookdown.yml to the following only the index.Rmd is compiled.
_bookdown.yml
book_filename: "_tmp_rmd_subdir"
delete_merged_file: true
language:
ui:
chapter_name: "Chapter "
rmd_subdir: ["content"]
R version 3.4.3 (2017-11-30) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows >= 8 x64 (build 9200)
Matrix products: default
locale: [1] LC_COLLATE=English_United Kingdom.1252 LC_CTYPE=English_United Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C
[5] LC_TIME=English_United Kingdom.1252attached base packages: [1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached): [1] Rcpp_0.12.15 bookdown_0.7 digest_0.6.14 rprojroot_1.3-2 backports_1.1.2 [6] magrittr_1.5 evaluate_0.10.1 stringi_1.1.6 rstudioapi_0.7 rmarkdown_1.9
[11] tools_3.4.3 stringr_1.3.0 tinytex_0.4 xfun_0.1 yaml_2.1.19
[16] rsconnect_0.8.5 compiler_3.4.3 htmltools_0.3.6 knitr_1.20