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stdlib: add use_flake function #847

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Nov 28, 2021
Merged

stdlib: add use_flake function #847

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13 changes: 13 additions & 0 deletions man/direnv-stdlib.1
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Expand Up @@ -397,6 +397,19 @@ If you have a \fB\fCdefault.nix\fR or \fB\fCshell.nix\fR these will be used by d
.PP
See http://nixos.org/nix/manual/#sec-nix-shell

.SS \fB\fCuse flake [<installable>]\fR
.PP
Load the build environment of a derivation similar to \fB\fCnix develop\fR\&.

.PP
By default it will load the current folder flake.nix devShell attribute. Or
pass an "installable" like "nixpkgs#hello" to load all the build dependencies
of the hello package from the latest nixpkgs.

.PP
Note that the flakes feature is hidden behind an experimental flag, which you
will have to enable on your own. Flakes is not considered stable yet.

.SS \fB\fCuse guix [...]\fR
.PP
Load environment variables from \fB\fCguix environment\fR\&.
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11 changes: 11 additions & 0 deletions man/direnv-stdlib.1.md
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Expand Up @@ -288,6 +288,17 @@ If you have a `default.nix` or `shell.nix` these will be used by default, but yo

See http://nixos.org/nix/manual/#sec-nix-shell

### `use flake [<installable>]`

Load the build environment of a derivation similar to `nix develop`.

By default it will load the current folder flake.nix devShell attribute. Or
pass an "installable" like "nixpkgs#hello" to load all the build dependencies
of the hello package from the latest nixpkgs.

Note that the flakes feature is hidden behind an experimental flag, which you
will have to enable on your own. Flakes is not considered stable yet.

### `use guix [...]`

Load environment variables from `guix environment`.
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16 changes: 16 additions & 0 deletions stdlib.go
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Expand Up @@ -1144,6 +1144,22 @@ const StdLib = "#!/usr/bin/env bash\n" +
" fi\n" +
"}\n" +
"\n" +
"# Usage: use_flake [<installable>]\n" +
"#\n" +
"# Load the build environment of a derivation similar to `nix develop`.\n" +
"#\n" +
"# By default it will load the current folder flake.nix devShell attribute. Or\n" +
"# pass an \"installable\" like \"nixpkgs#hello\" to load all the build\n" +
"# dependencies of the hello package from the latest nixpkgs.\n" +
"#\n" +
"# Note that the flakes feature is hidden behind an experimental flag, which\n" +
"# you will have to enable on your own. Flakes is not considered stable yet.\n" +
"use_flake() {\n" +
" watch_file flake.nix\n" +
" watch_file flake.lock\n" +
" eval \"$(nix print-dev-env --profile \"$(direnv_layout_dir)/flake-profile\" \"$@\")\"\n" +
"}\n" +
"\n" +
"# Usage: use_guix [...]\n" +
"#\n" +
"# Load environment variables from `guix environment`.\n" +
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16 changes: 16 additions & 0 deletions stdlib.sh
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Expand Up @@ -1141,6 +1141,22 @@ use_nix() {
fi
}

# Usage: use_flake [<installable>]
#
# Load the build environment of a derivation similar to `nix develop`.
#
# By default it will load the current folder flake.nix devShell attribute. Or
# pass an "installable" like "nixpkgs#hello" to load all the build
# dependencies of the hello package from the latest nixpkgs.
#
# Note that the flakes feature is hidden behind an experimental flag, which
# you will have to enable on your own. Flakes is not considered stable yet.
use_flake() {
watch_file flake.nix
watch_file flake.lock
eval "$(nix print-dev-env --profile "$(direnv_layout_dir)/flake-profile" "$@")"
}

# Usage: use_guix [...]
#
# Load environment variables from `guix environment`.
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