nixpkgs/lib/fetchers.nix

# snippets that can be shared by multiple fetchers (pkgs/build-support)
{ lib }:
{

  proxyImpureEnvVars = [
    # We borrow these environment variables from the caller to allow
    # easy proxy configuration.  This is impure, but a fixed-output
    # derivation like fetchurl is allowed to do so since its result is
    # by definition pure.
    "http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"
  ];

}
lib: trivial spelling fixes 2017-04-19 22:41:28 +03:00			`# snippets that can be shared by multiple fetchers (pkgs/build-support)`
Convert libs to a fixed-point This does break the API of being able to import any lib file and get its libs, however I'm not sure people did this. I made this while exploring being able to swap out docFn with a stub in #2305, to avoid functor performance problems. I don't know if that is going to move forward (or if it is a problem or not,) but after doing all this work figured I'd put it up anyway :) Two notable advantages to this approach: 1. when a lib inherits another lib's functions, it doesn't automatically get put in to the scope of lib 2. when a lib implements a new obscure functions, it doesn't automatically get put in to the scope of lib Using the test script (later in this commit) I got the following diff on the API: + diff master fixed-lib 11764a11765,11766 > .types.defaultFunctor > .types.defaultTypeMerge 11774a11777,11778 > .types.isOptionType > .types.isType 11781a11786 > .types.mkOptionType 11788a11794 > .types.setType 11795a11802 > .types.types This means that this commit _adds_ to the API, however I can't find a way to fix these last remaining discrepancies. At least none are _removed_. Test script (run with nix-repl in the PATH): #!/bin/sh set -eux repl() { suff=${1:-} echo "(import ./lib)$suff" \ \| nix-repl 2>&1 } attrs_to_check() { repl "${1:-}" \ \| tr ';' $'\n' \ \| grep "\.\.\." \ \| cut -d' ' -f2 \ \| sed -e "s/^/${1:-}./" \ \| sort } summ() { repl "${1:-}" \ \| tr ' ' $'\n' \ \| sort \ \| uniq } deep_summ() { suff="${1:-}" depth="${2:-4}" depth=$((depth - 1)) summ "$suff" for attr in $(attrs_to_check "$suff" \| grep -v "types.types"); do if [ $depth -eq 0 ]; then summ "$attr" \| sed -e "s/^/$attr./" else deep_summ "$attr" "$depth" \| sed -e "s/^/$attr./" fi done } ( cd nixpkgs #git add . #git commit -m "Auto-commit, sorry" \|\| true git checkout fixed-lib deep_summ > ../fixed-lib git checkout master deep_summ > ../master ) if diff master fixed-lib; then echo "SHALLOW MATCH!" fi ( cd nixpkgs git checkout fixed-lib repl .types ) 2017-07-29 03:05:35 +03:00			`{ lib }:`
lib/fetchers.nix: factor out impure proxy vars (#18702) Apparently everyone just copied those variables, instead of creating a library constant for them. Some even removed the comment. -.- 2016-09-17 22:50:01 +03:00			`{`

			`proxyImpureEnvVars = [`
			`# We borrow these environment variables from the caller to allow`
			`# easy proxy configuration. This is impure, but a fixed-output`
			`# derivation like fetchurl is allowed to do so since its result is`
			`# by definition pure.`
			`"http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"`
			`];`

			`}`