Org babel source blocks ignore buffer-local variables

[Dominik Schrempf]

Hello,

I use directory local environments with =envrc= [1], and run into trouble when
using (Bash) Org Babel source code blocks. The buffer local environment seems to
be ignored (see the example at the bottom).

This seems to have been discussed in the course of a GitHub issue of
=inheritenv= [2], which is pulled in by =envrc=. Also, on this mailing list,
there was a short discussion [3].

Do you have any thoughts on this? Is there an easy way to make Org Babel source
blocks honor buffer local setups?

Thank you!
Dominik

#+name: Scratch
#+begin_src sh :exports both :results output verbatim
function path () { echo "$PATH" | tr ':' '\n'; }
path
#+end_src

#+RESULTS: Scratch
#+begin_example
/home/dominik/Evolutionary-Biology/Scripts/nix-flakes
/home/dominik/Evolutionary-Biology/Scripts
/home/dominik/bin/nix-flakes
/home/dominik/bin
/run/wrappers/bin
/home/dominik/.nix-profile/bin
/etc/profiles/per-user/dominik/bin
/nix/var/nix/profiles/default/bin
/run/current-system/sw/bin
/nix/store/3l9lddwxz1mayaxvw8iy50ygzzfh1s1b-emacs-27.2/libexec/emacs/27.2/x86_64-pc-linux-gnu
#+end_example

The Emacs =exec-path= variable has the following value:

#+begin_quote
exec-path is a variable defined in ‘C source code’.
Its value is
("/nix/store/cnxncxyghj3gfpfvng6z4l8k4hfl48wq-ghc-8.10.6-with-packages/bin/" 
"/nix/store/435paza0j48aa9vgvf6r2l12nrg4ld11-patchelf-0.12/bin/" 
"/nix/store/4xs1xyj8728yvh9y5v6ji819kwgfy2fv-gcc-wrapper-10.3.0/bin/" 
"/nix/store/dlni53myj53kx20pi4yhm7p68lw17b07-gcc-10.3.0/bin/" 
"/nix/store/6z35qvn00xrjvaznv9kfy8xddbbdz4gl-glibc-2.33-47-bin/bin/" 
"/nix/store/1570w56jrkvr90w9x158vyb5vahnk18v-coreutils-8.32/bin/" 
"/nix/store/29bjq5hw1qglybp1a5f3ij9gxc2fyf94-binutils-wrapper-2.35.1/bin/" 
"/nix/store/v8imx1nvyz0hgvx9cbcmh6gp4ngw3ffj-binutils-2.35.1/bin/" 
"/nix/store/iz7bgfvjmwdz3vgmzryhfkqwbn8zr2jn-ncurses-6.2/bin/" 
"/nix/store/w07a7k61dw5gnsyxj3kgcq3shr76jax8-bash-interactive-4.4-p23/bin/" 
"/nix/store/xhxll8hx0x9szhlvvd8h1c35glszlj34-cabal-install-3.4.0.0/bin/" 
"/nix/store/gbxdjp9z1bjx1zl6icckw093yv0vn21r-haskell-language-server-1.2.0.0/bin/"
 "/nix/store/mx8v4f0hq8nff5ab7mcgmmbxn5rk6al4-aeson-pretty-0.8.8/bin/" 
"/nix/store/xygkar338ssrwqjcpmmbv1pkkpqc1yfy-ghc-8.10.6/bin/" 
"/nix/store/w16zhm17a73sn3sshqgpxjk3r265vb9l-ghcide-1.4.0.3/bin/" 
"/nix/store/isja3hvzjmmg7278mdsyyn0k4s7k6cf8-constraints-extras-0.3.1.0/bin/" 
"/nix/store/9kz9pwpgnq4miywf5bk97xpn4qqz1h2c-hie-bios-0.7.5/bin/" 
"/nix/store/wfpjw96bjc1kwx5spddwgpi8r4jrbc6b-hiedb-0.4.0.0/bin/" 
"/nix/store/il7l9fjr7r0sq00iy0jr6pcwcb97227p-shake-0.19.5/bin/" 
"/nix/store/9i7z6c6ydhkw1ch37hvpi6fywbfkyrm0-implicit-hie-0.1.2.6/bin/" 
"/nix/store/88kdasbl46rhfnz249dxnh5n9amr27pv-retrie-1.0.0.0/bin/" 
"/nix/store/i7djw6911qk0vkkxv5rsm2zh95arfmjp-brittany-0.13.1.2/bin/" 
"/nix/store/5mpyw1f5jamnvnhsawj147vyvwpw054s-floskell-0.10.5/bin/" 
"/nix/store/aj2q5q38wzlsl60vwcxirlc133p3i8hj-fourmolu-0.3.0.0/bin/" 
"/nix/store/mr0algmndmq73ybhnk3752ylhpnp7918-apply-refact-0.9.3.0/bin/" 
"/nix/store/k9h1adjqqwmq39iik3253cgxdd5drgz8-hlint-3.2.7/bin/" 
"/nix/store/rdjb7sx4clhzjfal0xhb41x1k62nchf0-cpphs-1.20.9.1/bin/" 
"/nix/store/wlh74ffhf19ychrcf65885jsx8xy5f8d-hscolour-1.24.4/bin/" 
"/nix/store/1lbb1bzjqcblb946av3703g76ng18jx1-ormolu-0.1.4.1-bin/bin/" 
"/nix/store/jvx2rcmbcrjpsvz4p8z5zll4gchmhl75-stylish-haskell-0.12.2.0/bin/" 
"/nix/store/h0yyp8i85y3cahd1wyxb0a0izxqz2gxj-stack-2.7.3/bin/" 
"/nix/store/62m5yxq7f9gz4xn3qlvkvkna237vz92k-hpack-0.34.4/bin/" 
"/nix/store/ki59g3c2y2ahpjja9hch3wxgl7gki5f3-mustache-2.3.1/bin/" 
"/nix/store/1wdm2g4mz9is77iihfkbycq3m8c2frrv-open-browser-0.2.1.0/bin/" 
"/nix/store/1570w56jrkvr90w9x158vyb5vahnk18v-coreutils-8.32/bin/" 
"/nix/store/ihxk2vlm0vi7c4j3gpm084kbxvz6v585-findutils-4.8.0/bin/" 
"/nix/store/kjx1mv85c5cgsrr4bwar22j7hbwj834m-diffutils-3.7/bin/" 
"/nix/store/gm2w08wwsa3vd500d8vq879s2lv65ldh-gnused-4.8/bin/" 
"/nix/store/v0slhpb2y3xa7gmv4q6gblkdk7n0f09j-gnugrep-3.6/bin/" 
"/nix/store/2wn093wbc6ps4brcsppxjd14vxvaa8a2-gawk-5.1.0/bin/" 
"/nix/store/5bxrjkyvqmzn1p897652y3lwa9fxagpw-gnutar-1.34/bin/" 
"/nix/store/liva1jnjdskrn57s42kfawr2zz66szzm-gzip-1.10/bin/" 
"/nix/store/ih2zkh2mbrx2c766ryk2i9hhlkly7snr-bzip2-1.0.6.0.2-bin/bin/" 
"/nix/store/pvkiiw0mp1yx0b21b7k105yywccychgh-gnumake-4.3/bin/" 
"/nix/store/dpjnjrqbgbm8a5wvi1hya01vd8wyvsq4-bash-4.4-p23/bin/" 
"/nix/store/aicl3kwfnaizk45aygm8bviqv7lk0a16-patch-2.7.6/bin/" 
"/nix/store/7jk6k46f56rszzc1bxi8mdrvcw53pym4-xz-5.2.5-bin/bin/" 
"/home/dominik/Evolutionary-Biology/Scripts/nix-flakes/" 
"/home/dominik/Evolutionary-Biology/Scripts/" "/home/dominik/bin/nix-flakes/" 
"/home/dominik/bin/" "/run/wrappers/bin/" "/home/dominik/.nix-profile/bin/" 
"/etc/profiles/per-user/dominik/bin/" "/nix/var/nix/profiles/default/bin/" 
"/run/current-system/sw/bin/" 
"/nix/store/3l9lddwxz1mayaxvw8iy50ygzzfh1s1b-emacs-27.2/libexec/emacs/27.2/x86_64-pc-linux-gnu/")
Original value was 
("/nix/store/cnxncxyghj3gfpfvng6z4l8k4hfl48wq-ghc-8.10.6-with-packages/bin" 
"/nix/store/435paza0j48aa9vgvf6r2l12nrg4ld11-patchelf-0.12/bin" 
"/nix/store/4xs1xyj8728yvh9y5v6ji819kwgfy2fv-gcc-wrapper-10.3.0/bin" 
"/nix/store/dlni53myj53kx20pi4yhm7p68lw17b07-gcc-10.3.0/bin" 
"/nix/store/6z35qvn00xrjvaznv9kfy8xddbbdz4gl-glibc-2.33-47-bin/bin" 
"/nix/store/1570w56jrkvr90w9x158vyb5vahnk18v-coreutils-8.32/bin" 
"/nix/store/29bjq5hw1qglybp1a5f3ij9gxc2fyf94-binutils-wrapper-2.35.1/bin" 
"/nix/store/v8imx1nvyz0hgvx9cbcmh6gp4ngw3ffj-binutils-2.35.1/bin" 
"/nix/store/iz7bgfvjmwdz3vgmzryhfkqwbn8zr2jn-ncurses-6.2/bin" 
"/nix/store/w07a7k61dw5gnsyxj3kgcq3shr76jax8-bash-interactive-4.4-p23/bin" 
"/nix/store/xhxll8hx0x9szhlvvd8h1c35glszlj34-cabal-install-3.4.0.0/bin" 
"/nix/store/gbxdjp9z1bjx1zl6icckw093yv0vn21r-haskell-language-server-1.2.0.0/bin"
 "/nix/store/mx8v4f0hq8nff5ab7mcgmmbxn5rk6al4-aeson-pretty-0.8.8/bin" 
"/nix/store/xygkar338ssrwqjcpmmbv1pkkpqc1yfy-ghc-8.10.6/bin" 
"/nix/store/w16zhm17a73sn3sshqgpxjk3r265vb9l-ghcide-1.4.0.3/bin" 
"/nix/store/isja3hvzjmmg7278mdsyyn0k4s7k6cf8-constraints-extras-0.3.1.0/bin" 
"/nix/store/9kz9pwpgnq4miywf5bk97xpn4qqz1h2c-hie-bios-0.7.5/bin" 
"/nix/store/wfpjw96bjc1kwx5spddwgpi8r4jrbc6b-hiedb-0.4.0.0/bin" 
"/nix/store/il7l9fjr7r0sq00iy0jr6pcwcb97227p-shake-0.19.5/bin" 
"/nix/store/9i7z6c6ydhkw1ch37hvpi6fywbfkyrm0-implicit-hie-0.1.2.6/bin" 
"/nix/store/88kdasbl46rhfnz249dxnh5n9amr27pv-retrie-1.0.0.0/bin" 
"/nix/store/i7djw6911qk0vkkxv5rsm2zh95arfmjp-brittany-0.13.1.2/bin" 
"/nix/store/5mpyw1f5jamnvnhsawj147vyvwpw054s-floskell-0.10.5/bin" 
"/nix/store/aj2q5q38wzlsl60vwcxirlc133p3i8hj-fourmolu-0.3.0.0/bin" 
"/nix/store/mr0algmndmq73ybhnk3752ylhpnp7918-apply-refact-0.9.3.0/bin" 
"/nix/store/k9h1adjqqwmq39iik3253cgxdd5drgz8-hlint-3.2.7/bin" 
"/nix/store/rdjb7sx4clhzjfal0xhb41x1k62nchf0-cpphs-1.20.9.1/bin" 
"/nix/store/wlh74ffhf19ychrcf65885jsx8xy5f8d-hscolour-1.24.4/bin" 
"/nix/store/1lbb1bzjqcblb946av3703g76ng18jx1-ormolu-0.1.4.1-bin/bin" 
"/nix/store/jvx2rcmbcrjpsvz4p8z5zll4gchmhl75-stylish-haskell-0.12.2.0/bin" 
"/nix/store/h0yyp8i85y3cahd1wyxb0a0izxqz2gxj-stack-2.7.3/bin" 
"/nix/store/62m5yxq7f9gz4xn3qlvkvkna237vz92k-hpack-0.34.4/bin" 
"/nix/store/ki59g3c2y2ahpjja9hch3wxgl7gki5f3-mustache-2.3.1/bin" 
"/nix/store/1wdm2g4mz9is77iihfkbycq3m8c2frrv-open-browser-0.2.1.0/bin" 
"/nix/store/1570w56jrkvr90w9x158vyb5vahnk18v-coreutils-8.32/bin" 
"/nix/store/ihxk2vlm0vi7c4j3gpm084kbxvz6v585-findutils-4.8.0/bin" 
"/nix/store/kjx1mv85c5cgsrr4bwar22j7hbwj834m-diffutils-3.7/bin" 
"/nix/store/gm2w08wwsa3vd500d8vq879s2lv65ldh-gnused-4.8/bin" 
"/nix/store/v0slhpb2y3xa7gmv4q6gblkdk7n0f09j-gnugrep-3.6/bin" 
"/nix/store/2wn093wbc6ps4brcsppxjd14vxvaa8a2-gawk-5.1.0/bin" 
"/nix/store/5bxrjkyvqmzn1p897652y3lwa9fxagpw-gnutar-1.34/bin" 
"/nix/store/liva1jnjdskrn57s42kfawr2zz66szzm-gzip-1.10/bin" 
"/nix/store/ih2zkh2mbrx2c766ryk2i9hhlkly7snr-bzip2-1.0.6.0.2-bin/bin" 
"/nix/store/pvkiiw0mp1yx0b21b7k105yywccychgh-gnumake-4.3/bin" 
"/nix/store/dpjnjrqbgbm8a5wvi1hya01vd8wyvsq4-bash-4.4-p23/bin" 
"/nix/store/aicl3kwfnaizk45aygm8bviqv7lk0a16-patch-2.7.6/bin" 
"/nix/store/7jk6k46f56rszzc1bxi8mdrvcw53pym4-xz-5.2.5-bin/bin" 
"/home/dominik/Evolutionary-Biology/Scripts/nix-flakes" 
"/home/dominik/Evolutionary-Biology/Scripts" "/home/dominik/bin/nix-flakes" 
"/home/dominik/bin" "/run/wrappers/bin" "/home/dominik/.nix-profile/bin" 
"/etc/profiles/per-user/dominik/bin" "/nix/var/nix/profiles/default/bin" 
"/run/current-system/sw/bin" 
"/nix/store/3l9lddwxz1mayaxvw8iy50ygzzfh1s1b-emacs-27.2/libexec/emacs/27.2/x86_64-pc-linux-gnu"
 
"/nix/store/3l9lddwxz1mayaxvw8iy50ygzzfh1s1b-emacs-27.2/libexec/emacs/27.2/x86_64-pc-linux-gnu")
Local in buffer README.org; global value is 
("/home/dominik/Evolutionary-Biology/Scripts/nix-flakes" 
"/home/dominik/Evolutionary-Biology/Scripts" "/home/dominik/bin/nix-flakes" 
"/home/dominik/bin" "/run/wrappers/bin" "/home/dominik/.nix-profile/bin" 
"/etc/profiles/per-user/dominik/bin" "/nix/var/nix/profiles/default/bin" 
"/run/current-system/sw/bin" 
"/nix/store/3l9lddwxz1mayaxvw8iy50ygzzfh1s1b-emacs-27.2/libexec/emacs/27.2/x86_64-pc-linux-gnu")
#+end_quote

[1] https://github.com/purcell/envrc
[2] https://github.com/purcell/inheritenv/issues/4
[3] 
https://orgmode.org/list/3d3611c4-17a6-4d55-875b-f566c28d297b@www.fastmail.com/