112 lines
3.4 KiB
Nix
112 lines
3.4 KiB
Nix
# idea: provide nix environment for your developement actions
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# experimental
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/*
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# example:
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# add postgresql to environment and create ctags (tagfiles can be extracted from TAG_FILES)
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# add this to your ~/.nixpkgs/config.nix
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{
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packageOverrides = pkgs : with pkgs; with sourceAndTags;
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let simple = { name, buildInputs ? [], cTags ? [], extraCmds ? ""}:
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pkgs.myEnvFun {
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inherit name;
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buildInputs = buildInputs
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++ map (x : sourceWithTagsDerivation ( (addCTaggingInfo x ).passthru.sourceWithTags ) ) cTags;
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extraCmds = ''
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${extraCmds}
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HOME=${builtins.getEnv "HOME"}
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. ~/.bashrc
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'';
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};
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in rec {
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nixEnv = simple {
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name = "nix";
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buildInputs = [ libtool stdenv perl curl bzip2 openssl aterm242fixes db45 autoconf automake zlib ];
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cTags = [ aterm242fixes];
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};
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[...]
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};
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}
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Put this into your .bashrc
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loadEnv(){ . "${HOME}/.nix-profile/dev-envs/${1}" }
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then nix-env -iA ...nixEnv
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and
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$ loadEnv postgresql
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*/
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{ mkDerivation, substituteAll, pkgs } : { stdenv ? pkgs.stdenv, name, buildInputs ? [], cTags ? [], extraCmds ? ""} :
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mkDerivation {
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buildInputs = [ ] ++ buildInputs ;
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name = "env-${name}";
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phases = "buildPhase";
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setupNew = substituteAll {
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src = ../../stdenv/generic/setup.sh;
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preHook="";
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postHook="";
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initialPath= (import ../../stdenv/common-path.nix) { inherit pkgs; };
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gcc = stdenv.gcc;
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};
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buildPhase = ''
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set -x
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mkdir -p "$out/dev-envs" "$out/nix-support"
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s="$out/nix-support/setup-new-modified"
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cp "$setupNew" "$s"
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# shut some warning up.., do not use set -e
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sed -e 's@set -e@@' \
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-e 's@assertEnvExists\s\+NIX_STORE@:@' \
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-e 's@trap.*@@' \
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-i "$s"
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cat >> "$out/dev-envs/''${name/env-/}" << EOF
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buildInputs="$buildInputs"
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# the setup-new script wants to write some data to a temp file.. so just let it do that and tidy up afterwards
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tmp="\$("${pkgs.coreutils}/bin/mktemp" -d)"
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NIX_BUILD_TOP="\$tmp"
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phases=
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# only do all the setup stuff in nix-support/*
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set +e
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if [[ -z "\$ZSH_VERSION" ]]; then
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source "$s"
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else
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setopt interactivecomments
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# fix bash indirection
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# let's hope the bash arrays aren't used
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# substitute is using bash array, so skip it
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echo '
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setopt NO_BAD_PATTERN
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setopt NO_BANG_HIST
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setopt NO_BG_NICE
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setopt NO_EQUALS
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setopt NO_FUNCTION_ARGZERO
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setopt GLOB_SUBST
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setopt NO_HUP
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setopt INTERACTIVE_COMMENTS
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setopt KSH_ARRAYS
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setopt NO_MULTIOS
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setopt NO_NOMATCH
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setopt RM_STAR_SILENT
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setopt POSIX_BUILTINS
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setopt SH_FILE_EXPANSION
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setopt SH_GLOB
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setopt SH_OPTION_LETTERS
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setopt SH_WORD_SPLIT
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' >> "\$tmp/script"
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sed -e 's/\''${!\([^}]*\)}/\''${(P)\1}/g' \
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-e 's/[[]\*\]//' \
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-e 's/substitute() {/ substitute() { return; /' \
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-e 's@PATH=\$@PATH=${pkgs.coreutils}/bin@' \
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"$s" >> "\$tmp/script"
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echo "\$tmp/script";
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source "\$tmp/script";
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fi
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rm -fr "\$tmp"
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${extraCmds}
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export PATH
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echo $name loaded
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EOF
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'';
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}
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