Command to print all PATH information that can be consumed by the shell

[lostman]

OCaml's opam has a convenient command to setup environment variables:

❯ opam config env
CAML_LD_LIBRARY_PATH="/Users/lostman/.opam/system/lib/stublibs:/usr/local/lib/ocaml/stublibs"; export CAML_LD_LIBRARY_PATH;
OPAMUTF8MSGS="1"; export OPAMUTF8MSGS;
MANPATH=":/Users/lostman/.opam/system/man"; export MANPATH;
MAKELEVEL=""; export MAKELEVEL;
MAKEFLAGS=""; export MAKEFLAGS;
PERL5LIB="/Users/lostman/.opam/system/lib/perl5"; export PERL5LIB;
OCAML_TOPLEVEL_PATH="/Users/lostman/.opam/system/lib/toplevel"; export OCAML_TOPLEVEL_PATH;
PATH="/Users/lostman/.opam/system/bin:/Users/lostman/.local/bin:/Users/lostman/.cabal/bin:/Users/lostman/bin:/usr/local/Cellar/llvm/3.4.2/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin"; export PATH;

Which can be consumed by:

eval `opam config env`

It would be great if stack offered something similar. In particular, when using stack-installed GHC one needs to add it to PATH. Ditto regarding bin/ directory. While stack exec foo works, it is not enough when I want to call more than one binary from a script.

stack config env (or equivalent) could work globally by pointing to the latest GHC version that has been installed and locally in a directory with stack.yaml by pointing to GHC version that is required to build that particular project.

[snoyberg]

Are you aware of stack path?

On Fri, Jul 17, 2015, 8:41 AM Maciej Woś notifications@github.com wrote:

OCaml's opam has a convenient command to setup environment variables:

❯ opam config env
CAML_LD_LIBRARY_PATH="/Users/lostman/.opam/system/lib/stublibs:/usr/local/lib/ocaml/stublibs"; export CAML_LD_LIBRARY_PATH;
OPAMUTF8MSGS="1"; export OPAMUTF8MSGS;
MANPATH=":/Users/lostman/.opam/system/man"; export MANPATH;
MAKELEVEL=""; export MAKELEVEL;
MAKEFLAGS=""; export MAKEFLAGS;
PERL5LIB="/Users/lostman/.opam/system/lib/perl5"; export PERL5LIB;
OCAML_TOPLEVEL_PATH="/Users/lostman/.opam/system/lib/toplevel"; export OCAML_TOPLEVEL_PATH;
PATH="/Users/lostman/.opam/system/bin:/Users/lostman/.local/bin:/Users/lostman/.cabal/bin:/Users/lostman/bin:/usr/local/Cellar/llvm/3.4.2/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin"; export PATH;

Which can be consumed by:

eval opam config env

It would be great if stack offered something similar. In particular, when
using stack-installed GHC one needs to add it to PATH. Ditto regarding
bin/ directory. While stack exec foo works, it is not enough when I want
to call more than one binary from a script.

stack config env (or equivalent) could work globally by pointing to the
latest GHC version that has been installed and locally in a directory with
stack.yaml by pointing to GHC version that is required to build that
particular project.

—
Reply to this email directly or view it on GitHub
#620.

[lostman]

@snoyberg yes, I've seen stack path. It is different from what I'm talking about though. For instance, bin-path includes all sorts of location, presumably both from PATH and local stack directories. What I think would be useful is a command that can setup all those paths in the current shell.

I just realised that a similar effect can be achieved by issuing stack exec bash or stack exec zsh, but that doesn't display which variables are set and it starts a separate shell.

[snoyberg]

Would you be interested in taking a stab at a PR for this?

[lostman]

@snoyberg Sure, I'll take a stab at this once I'll have a free weekend.

[sjakobi]

@lostman Does the following command do what you have in mind?

$ comm -23 <(stack exec env | sort) <(env | sort) | sed 's/.*/export &;/'
export GHC_PACKAGE_PATH=/home/simon/src/stack/.stack-work/install/x86_64-linux/lts-3.4/7.10.2/pkgdb:/home/simon/.stack/snapshots/x86_64-linux/lts-3.4/7.10.2/pkgdb:/home/simon/.stack/programs/x86_64-linux/ghc-7.10.2/lib/ghc-7.10.2/package.conf.d;
export HASKELL_DIST_DIR=.stack-work/dist/x86_64-linux/Cabal-1.22.4.0;
export HASKELL_PACKAGE_SANDBOXES=/home/simon/src/stack/.stack-work/install/x86_64-linux/lts-3.4/7.10.2/pkgdb:/home/simon/.stack/snapshots/x86_64-linux/lts-3.4/7.10.2/pkgdb:;
export HASKELL_PACKAGE_SANDBOX=/home/simon/.stack/snapshots/x86_64-linux/lts-3.4/7.10.2/pkgdb;
export PATH=/home/simon/src/stack/.stack-work/install/x86_64-linux/lts-3.4/7.10.2/bin:/home/simon/.stack/snapshots/x86_64-linux/lts-3.4/7.10.2/bin:/home/simon/.stack/programs/x86_64-linux/ghc-7.10.2/bin: # snip
export STACK_EXE=/usr/bin/stack;
export _=/usr/bin/stack;

[snoyberg]

PR #4642 open.