Backport 'nix dev-shell' from the flakes branch
This also adds a '--profile' option to 'nix build' (replacing 'nix-env --set').
This commit is contained in:
Eelco Dolstra
parent
367577d9a6
commit
e1a94ad852
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@ -478,6 +478,17 @@ Path createTempDir(const Path & tmpRoot, const Path & prefix,
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}
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std::pair<AutoCloseFD, Path> createTempFile(const Path & prefix)
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{
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Path tmpl(getEnv("TMPDIR").value_or("/tmp") + "/" + prefix + ".XXXXXX");
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// Strictly speaking, this is UB, but who cares...
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AutoCloseFD fd(mkstemp((char *) tmpl.c_str()));
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if (!fd)
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throw SysError("creating temporary file '%s'", tmpl);
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return {std::move(fd), tmpl};
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}
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std::string getUserName()
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{
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auto pw = getpwuid(geteuid());
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@ -122,10 +122,6 @@ void deletePath(const Path & path);
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void deletePath(const Path & path, unsigned long long & bytesFreed);
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/* Create a temporary directory. */
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Path createTempDir(const Path & tmpRoot = "", const Path & prefix = "nix",
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bool includePid = true, bool useGlobalCounter = true, mode_t mode = 0755);
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std::string getUserName();
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/* Return $HOME or the user's home directory from /etc/passwd. */
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@ -205,6 +201,14 @@ public:
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};
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/* Create a temporary directory. */
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Path createTempDir(const Path & tmpRoot = "", const Path & prefix = "nix",
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bool includePid = true, bool useGlobalCounter = true, mode_t mode = 0755);
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/* Create a temporary file, returning a file handle and its path. */
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std::pair<AutoCloseFD, Path> createTempFile(const Path & prefix = "nix");
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class Pipe
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{
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public:
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@ -5,7 +5,7 @@
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using namespace nix;
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struct CmdBuild : MixDryRun, InstallablesCommand
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struct CmdBuild : InstallablesCommand, MixDryRun, MixProfile
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{
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Path outLink = "result";
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@ -40,6 +40,10 @@ struct CmdBuild : MixDryRun, InstallablesCommand
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"To build the build.x86_64-linux attribute from release.nix:",
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"nix build -f release.nix build.x86_64-linux"
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},
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Example{
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"To make a profile point at GNU Hello:",
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"nix build --profile /tmp/profile nixpkgs.hello"
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},
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};
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}
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@ -49,18 +53,19 @@ struct CmdBuild : MixDryRun, InstallablesCommand
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if (dryRun) return;
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for (size_t i = 0; i < buildables.size(); ++i) {
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auto & b(buildables[i]);
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if (outLink != "")
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for (auto & output : b.outputs)
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if (outLink != "") {
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for (size_t i = 0; i < buildables.size(); ++i) {
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for (auto & output : buildables[i].outputs)
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if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>()) {
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std::string symlink = outLink;
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if (i) symlink += fmt("-%d", i);
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if (output.first != "out") symlink += fmt("-%s", output.first);
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store2->addPermRoot(output.second, absPath(symlink), true);
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}
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}
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}
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updateProfile(buildables);
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}
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};
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@ -2,6 +2,9 @@
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#include "store-api.hh"
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#include "derivations.hh"
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#include "nixexpr.hh"
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#include "profiles.hh"
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extern char * * environ;
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namespace nix {
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@ -96,4 +99,95 @@ Strings editorFor(const Pos & pos)
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return args;
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}
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MixProfile::MixProfile()
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{
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mkFlag()
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.longName("profile")
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.description("profile to update")
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.labels({"path"})
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.dest(&profile);
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}
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void MixProfile::updateProfile(const StorePath & storePath)
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{
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if (!profile) return;
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auto store = getStore().dynamic_pointer_cast<LocalFSStore>();
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if (!store) throw Error("'--profile' is not supported for this Nix store");
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auto profile2 = absPath(*profile);
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switchLink(profile2,
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createGeneration(
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ref<LocalFSStore>(store),
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profile2, store->printStorePath(storePath)));
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}
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void MixProfile::updateProfile(const Buildables & buildables)
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{
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if (!profile) return;
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std::optional<StorePath> result;
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for (auto & buildable : buildables) {
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for (auto & output : buildable.outputs) {
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if (result)
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throw Error("'--profile' requires that the arguments produce a single store path, but there are multiple");
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result = output.second.clone();
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}
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}
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if (!result)
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throw Error("'--profile' requires that the arguments produce a single store path, but there are none");
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updateProfile(*result);
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}
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MixDefaultProfile::MixDefaultProfile()
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{
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profile = getDefaultProfile();
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}
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MixEnvironment::MixEnvironment() : ignoreEnvironment(false) {
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mkFlag()
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.longName("ignore-environment")
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.shortName('i')
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.description("clear the entire environment (except those specified with --keep)")
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.set(&ignoreEnvironment, true);
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mkFlag()
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.longName("keep")
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.shortName('k')
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.description("keep specified environment variable")
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.arity(1)
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.labels({"name"})
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.handler([&](std::vector<std::string> ss) { keep.insert(ss.front()); });
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mkFlag()
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.longName("unset")
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.shortName('u')
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.description("unset specified environment variable")
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.arity(1)
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.labels({"name"})
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.handler([&](std::vector<std::string> ss) { unset.insert(ss.front()); });
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}
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void MixEnvironment::setEnviron() {
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if (ignoreEnvironment) {
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if (!unset.empty())
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throw UsageError("--unset does not make sense with --ignore-environment");
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for (const auto & var : keep) {
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auto val = getenv(var.c_str());
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if (val) stringsEnv.emplace_back(fmt("%s=%s", var.c_str(), val));
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}
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vectorEnv = stringsToCharPtrs(stringsEnv);
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environ = vectorEnv.data();
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} else {
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if (!keep.empty())
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throw UsageError("--keep does not make sense without --ignore-environment");
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for (const auto & var : unset)
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unsetenv(var.c_str());
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}
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}
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}
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@ -1,5 +1,6 @@
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#pragma once
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#include "installables.hh"
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#include "args.hh"
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#include "common-eval-args.hh"
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#include "path.hh"
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@ -22,34 +23,7 @@ private:
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std::shared_ptr<Store> _store;
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};
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struct Buildable
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{
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std::optional<StorePath> drvPath;
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std::map<std::string, StorePath> outputs;
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};
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typedef std::vector<Buildable> Buildables;
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struct Installable
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{
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virtual ~Installable() { }
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virtual std::string what() = 0;
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virtual Buildables toBuildables()
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{
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throw Error("argument '%s' cannot be built", what());
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}
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Buildable toBuildable();
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virtual std::pair<Value *, Pos> toValue(EvalState & state)
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{
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throw Error("argument '%s' cannot be evaluated", what());
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}
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};
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struct SourceExprCommand : virtual Args, StoreCommand, MixEvalArgs
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struct SourceExprCommand : virtual StoreCommand, MixEvalArgs
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{
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Path file;
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@ -184,4 +158,36 @@ std::set<StorePath> toDerivations(ref<Store> store,
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filename:lineno. */
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Strings editorFor(const Pos & pos);
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struct MixProfile : virtual StoreCommand
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{
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std::optional<Path> profile;
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MixProfile();
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/* If 'profile' is set, make it point at 'storePath'. */
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void updateProfile(const StorePath & storePath);
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/* If 'profile' is set, make it point at the store path produced
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by 'buildables'. */
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void updateProfile(const Buildables & buildables);
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};
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struct MixDefaultProfile : MixProfile
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{
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MixDefaultProfile();
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};
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struct MixEnvironment : virtual Args {
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StringSet keep, unset;
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Strings stringsEnv;
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std::vector<char*> vectorEnv;
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bool ignoreEnvironment;
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MixEnvironment();
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/* Modify global environ based on ignoreEnvironment, keep, and unset. It's expected that exec will be called before this class goes out of scope, otherwise environ will become invalid. */
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void setEnviron();
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};
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}
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@ -109,6 +109,11 @@ struct InstallableStorePath : Installable
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bs.push_back(std::move(b));
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return bs;
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}
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std::optional<StorePath> getStorePath() override
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{
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return storePath.clone();
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}
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};
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struct InstallableValue : Installable
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45
src/nix/installables.hh
Normal file
45
src/nix/installables.hh
Normal file
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@ -0,0 +1,45 @@
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#pragma once
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#include "util.hh"
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#include "path.hh"
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#include "eval.hh"
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#include <optional>
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namespace nix {
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struct Buildable
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{
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std::optional<StorePath> drvPath;
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std::map<std::string, StorePath> outputs;
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};
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typedef std::vector<Buildable> Buildables;
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struct Installable
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{
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virtual ~Installable() { }
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virtual std::string what() = 0;
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virtual Buildables toBuildables()
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{
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throw Error("argument '%s' cannot be built", what());
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}
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Buildable toBuildable();
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virtual std::pair<Value *, Pos> toValue(EvalState & state)
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{
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throw Error("argument '%s' cannot be evaluated", what());
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}
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/* Return a value only if this installable is a store path or a
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symlink to it. */
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virtual std::optional<StorePath> getStorePath()
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{
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return {};
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}
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};
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}
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120
src/nix/run.cc
120
src/nix/run.cc
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@ -8,6 +8,7 @@
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#include "fs-accessor.hh"
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#include "progress-bar.hh"
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#include "affinity.hh"
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#include "eval.hh"
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#if __linux__
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#include <sys/mount.h>
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@ -19,11 +20,46 @@ using namespace nix;
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std::string chrootHelperName = "__run_in_chroot";
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struct CmdRun : InstallablesCommand
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struct RunCommon : virtual Command
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{
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void runProgram(ref<Store> store,
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const std::string & program,
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const Strings & args)
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{
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stopProgressBar();
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restoreSignals();
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restoreAffinity();
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/* If this is a diverted store (i.e. its "logical" location
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(typically /nix/store) differs from its "physical" location
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(e.g. /home/eelco/nix/store), then run the command in a
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chroot. For non-root users, this requires running it in new
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mount and user namespaces. Unfortunately,
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unshare(CLONE_NEWUSER) doesn't work in a multithreaded
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program (which "nix" is), so we exec() a single-threaded
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helper program (chrootHelper() below) to do the work. */
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auto store2 = store.dynamic_pointer_cast<LocalStore>();
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if (store2 && store->storeDir != store2->realStoreDir) {
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Strings helperArgs = { chrootHelperName, store->storeDir, store2->realStoreDir, program };
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for (auto & arg : args) helperArgs.push_back(arg);
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execv(readLink("/proc/self/exe").c_str(), stringsToCharPtrs(helperArgs).data());
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throw SysError("could not execute chroot helper");
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}
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execvp(program.c_str(), stringsToCharPtrs(args).data());
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throw SysError("unable to execute '%s'", program);
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}
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};
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struct CmdRun : InstallablesCommand, RunCommon, MixEnvironment
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{
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std::vector<std::string> command = { "bash" };
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StringSet keep, unset;
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bool ignoreEnvironment = false;
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CmdRun()
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{
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@ -37,28 +73,6 @@ struct CmdRun : InstallablesCommand
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if (ss.empty()) throw UsageError("--command requires at least one argument");
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command = ss;
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});
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mkFlag()
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.longName("ignore-environment")
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.shortName('i')
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.description("clear the entire environment (except those specified with --keep)")
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.set(&ignoreEnvironment, true);
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mkFlag()
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.longName("keep")
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.shortName('k')
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.description("keep specified environment variable")
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.arity(1)
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.labels({"name"})
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.handler([&](std::vector<std::string> ss) { keep.insert(ss.front()); });
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mkFlag()
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.longName("unset")
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.shortName('u')
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.description("unset specified environment variable")
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.arity(1)
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.labels({"name"})
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.handler([&](std::vector<std::string> ss) { unset.insert(ss.front()); });
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}
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std::string description() override
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@ -94,35 +108,13 @@ struct CmdRun : InstallablesCommand
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auto accessor = store->getFSAccessor();
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if (ignoreEnvironment) {
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if (!unset.empty())
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throw UsageError("--unset does not make sense with --ignore-environment");
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std::map<std::string, std::string> kept;
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for (auto & var : keep) {
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auto s = getenv(var.c_str());
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if (s) kept[var] = s;
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}
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clearEnv();
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for (auto & var : kept)
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setenv(var.first.c_str(), var.second.c_str(), 1);
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} else {
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if (!keep.empty())
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throw UsageError("--keep does not make sense without --ignore-environment");
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for (auto & var : unset)
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unsetenv(var.c_str());
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}
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std::unordered_set<StorePath> done;
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std::queue<StorePath> todo;
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for (auto & path : outPaths) todo.push(path.clone());
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setEnviron();
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auto unixPath = tokenizeString<Strings>(getEnv("PATH").value_or(""), ":");
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while (!todo.empty()) {
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@ -142,38 +134,10 @@ struct CmdRun : InstallablesCommand
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setenv("PATH", concatStringsSep(":", unixPath).c_str(), 1);
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std::string cmd = *command.begin();
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Strings args;
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for (auto & arg : command) args.push_back(arg);
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stopProgressBar();
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restoreSignals();
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restoreAffinity();
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/* If this is a diverted store (i.e. its "logical" location
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(typically /nix/store) differs from its "physical" location
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(e.g. /home/eelco/nix/store), then run the command in a
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chroot. For non-root users, this requires running it in new
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mount and user namespaces. Unfortunately,
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unshare(CLONE_NEWUSER) doesn't work in a multithreaded
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program (which "nix" is), so we exec() a single-threaded
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helper program (chrootHelper() below) to do the work. */
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auto store2 = store.dynamic_pointer_cast<LocalStore>();
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if (store2 && store->storeDir != store2->realStoreDir) {
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Strings helperArgs = { chrootHelperName, store->storeDir, store2->realStoreDir, cmd };
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for (auto & arg : args) helperArgs.push_back(arg);
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execv(readLink("/proc/self/exe").c_str(), stringsToCharPtrs(helperArgs).data());
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throw SysError("could not execute chroot helper");
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}
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execvp(cmd.c_str(), stringsToCharPtrs(args).data());
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throw SysError("unable to exec '%s'", cmd);
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runProgram(store, *command.begin(), args);
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}
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};
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|
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319
src/nix/shell.cc
Normal file
319
src/nix/shell.cc
Normal file
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@ -0,0 +1,319 @@
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#include "eval.hh"
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#include "command.hh"
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#include "common-args.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include "derivations.hh"
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#include "affinity.hh"
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#include "progress-bar.hh"
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||||
|
||||
#include <regex>
|
||||
|
||||
using namespace nix;
|
||||
|
||||
struct Var
|
||||
{
|
||||
bool exported;
|
||||
std::string value; // quoted string or array
|
||||
};
|
||||
|
||||
struct BuildEnvironment
|
||||
{
|
||||
std::map<std::string, Var> env;
|
||||
std::string bashFunctions;
|
||||
};
|
||||
|
||||
BuildEnvironment readEnvironment(const Path & path)
|
||||
{
|
||||
BuildEnvironment res;
|
||||
|
||||
std::set<std::string> exported;
|
||||
|
||||
debug("reading environment file '%s'", path);
|
||||
|
||||
auto file = readFile(path);
|
||||
|
||||
auto pos = file.cbegin();
|
||||
|
||||
static std::string varNameRegex =
|
||||
R"re((?:[a-zA-Z_][a-zA-Z0-9_]*))re";
|
||||
|
||||
static std::regex declareRegex(
|
||||
"^declare -x (" + varNameRegex + ")" +
|
||||
R"re((?:="((?:[^"\\]|\\.)*)")?\n)re");
|
||||
|
||||
static std::string simpleStringRegex =
|
||||
R"re((?:[a-zA-Z0-9_/:\.\-\+=]*))re";
|
||||
|
||||
static std::string quotedStringRegex =
|
||||
R"re((?:\$?'(?:[^'\\]|\\[abeEfnrtv\\'"?])*'))re";
|
||||
|
||||
static std::string arrayRegex =
|
||||
R"re((?:\(( *\[[^\]]+\]="(?:[^"\\]|\\.)*")*\)))re";
|
||||
|
||||
static std::regex varRegex(
|
||||
"^(" + varNameRegex + ")=(" + simpleStringRegex + "|" + quotedStringRegex + "|" + arrayRegex + ")\n");
|
||||
|
||||
static std::regex functionRegex(
|
||||
"^" + varNameRegex + " \\(\\) *\n");
|
||||
|
||||
while (pos != file.end()) {
|
||||
|
||||
std::smatch match;
|
||||
|
||||
if (std::regex_search(pos, file.cend(), match, declareRegex)) {
|
||||
pos = match[0].second;
|
||||
exported.insert(match[1]);
|
||||
}
|
||||
|
||||
else if (std::regex_search(pos, file.cend(), match, varRegex)) {
|
||||
pos = match[0].second;
|
||||
res.env.insert({match[1], Var { (bool) exported.count(match[1]), match[2] }});
|
||||
}
|
||||
|
||||
else if (std::regex_search(pos, file.cend(), match, functionRegex)) {
|
||||
res.bashFunctions = std::string(pos, file.cend());
|
||||
break;
|
||||
}
|
||||
|
||||
else throw Error("shell environment '%s' has unexpected line '%s'",
|
||||
path, file.substr(pos - file.cbegin(), 60));
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
/* Given an existing derivation, return the shell environment as
|
||||
initialised by stdenv's setup script. We do this by building a
|
||||
modified derivation with the same dependencies and nearly the same
|
||||
initial environment variables, that just writes the resulting
|
||||
environment to a file and exits. */
|
||||
StorePath getDerivationEnvironment(ref<Store> store, Derivation drv)
|
||||
{
|
||||
auto builder = baseNameOf(drv.builder);
|
||||
if (builder != "bash")
|
||||
throw Error("'nix shell' only works on derivations that use 'bash' as their builder");
|
||||
|
||||
drv.args = {
|
||||
"-c",
|
||||
"set -e; "
|
||||
"export IN_NIX_SHELL=impure; "
|
||||
"export dontAddDisableDepTrack=1; "
|
||||
"if [[ -n $stdenv ]]; then "
|
||||
" source $stdenv/setup; "
|
||||
"fi; "
|
||||
"export > $out; "
|
||||
"set >> $out "};
|
||||
|
||||
/* Remove derivation checks. */
|
||||
drv.env.erase("allowedReferences");
|
||||
drv.env.erase("allowedRequisites");
|
||||
drv.env.erase("disallowedReferences");
|
||||
drv.env.erase("disallowedRequisites");
|
||||
|
||||
// FIXME: handle structured attrs
|
||||
|
||||
/* Rehash and write the derivation. FIXME: would be nice to use
|
||||
'buildDerivation', but that's privileged. */
|
||||
auto drvName = drv.env["name"] + "-env";
|
||||
for (auto & output : drv.outputs)
|
||||
drv.env.erase(output.first);
|
||||
drv.env["out"] = "";
|
||||
drv.env["outputs"] = "out";
|
||||
Hash h = hashDerivationModulo(*store, drv, true);
|
||||
auto shellOutPath = store->makeOutputPath("out", h, drvName);
|
||||
drv.outputs.insert_or_assign("out", DerivationOutput(shellOutPath.clone(), "", ""));
|
||||
drv.env["out"] = store->printStorePath(shellOutPath);
|
||||
auto shellDrvPath2 = writeDerivation(store, drv, drvName);
|
||||
|
||||
/* Build the derivation. */
|
||||
store->buildPaths({shellDrvPath2});
|
||||
|
||||
assert(store->isValidPath(shellOutPath));
|
||||
|
||||
return shellOutPath;
|
||||
}
|
||||
|
||||
struct Common : InstallableCommand, MixProfile
|
||||
{
|
||||
std::set<string> ignoreVars{
|
||||
"BASHOPTS",
|
||||
"EUID",
|
||||
"HOME", // FIXME: don't ignore in pure mode?
|
||||
"NIX_BUILD_TOP",
|
||||
"NIX_ENFORCE_PURITY",
|
||||
"NIX_LOG_FD",
|
||||
"PPID",
|
||||
"PWD",
|
||||
"SHELLOPTS",
|
||||
"SHLVL",
|
||||
"SSL_CERT_FILE", // FIXME: only want to ignore /no-cert-file.crt
|
||||
"TEMP",
|
||||
"TEMPDIR",
|
||||
"TERM",
|
||||
"TMP",
|
||||
"TMPDIR",
|
||||
"TZ",
|
||||
"UID",
|
||||
};
|
||||
|
||||
void makeRcScript(const BuildEnvironment & buildEnvironment, std::ostream & out)
|
||||
{
|
||||
out << "nix_saved_PATH=\"$PATH\"\n";
|
||||
|
||||
for (auto & i : buildEnvironment.env) {
|
||||
if (!ignoreVars.count(i.first) && !hasPrefix(i.first, "BASH_")) {
|
||||
out << fmt("%s=%s\n", i.first, i.second.value);
|
||||
if (i.second.exported)
|
||||
out << fmt("export %s\n", i.first);
|
||||
}
|
||||
}
|
||||
|
||||
out << "PATH=\"$PATH:$nix_saved_PATH\"\n";
|
||||
|
||||
out << buildEnvironment.bashFunctions << "\n";
|
||||
|
||||
// FIXME: set outputs
|
||||
|
||||
out << "export NIX_BUILD_TOP=\"$(mktemp -d --tmpdir nix-shell.XXXXXX)\"\n";
|
||||
for (auto & i : {"TMP", "TMPDIR", "TEMP", "TEMPDIR"})
|
||||
out << fmt("export %s=\"$NIX_BUILD_TOP\"\n", i);
|
||||
|
||||
out << "eval \"$shellHook\"\n";
|
||||
}
|
||||
|
||||
StorePath getShellOutPath(ref<Store> store)
|
||||
{
|
||||
auto path = installable->getStorePath();
|
||||
if (path && hasSuffix(path->to_string(), "-env"))
|
||||
return path->clone();
|
||||
else {
|
||||
auto drvs = toDerivations(store, {installable});
|
||||
|
||||
if (drvs.size() != 1)
|
||||
throw Error("'%s' needs to evaluate to a single derivation, but it evaluated to %d derivations",
|
||||
installable->what(), drvs.size());
|
||||
|
||||
auto & drvPath = *drvs.begin();
|
||||
|
||||
return getDerivationEnvironment(store, store->derivationFromPath(drvPath));
|
||||
}
|
||||
}
|
||||
|
||||
BuildEnvironment getBuildEnvironment(ref<Store> store)
|
||||
{
|
||||
auto shellOutPath = getShellOutPath(store);
|
||||
|
||||
updateProfile(shellOutPath);
|
||||
|
||||
return readEnvironment(store->printStorePath(shellOutPath));
|
||||
}
|
||||
};
|
||||
|
||||
struct CmdDevShell : Common, MixEnvironment
|
||||
{
|
||||
std::vector<std::string> command;
|
||||
|
||||
CmdDevShell()
|
||||
{
|
||||
mkFlag()
|
||||
.longName("command")
|
||||
.shortName('c')
|
||||
.description("command and arguments to be executed insted of an interactive shell")
|
||||
.labels({"command", "args"})
|
||||
.arity(ArityAny)
|
||||
.handler([&](std::vector<std::string> ss) {
|
||||
if (ss.empty()) throw UsageError("--command requires at least one argument");
|
||||
command = ss;
|
||||
});
|
||||
}
|
||||
|
||||
std::string description() override
|
||||
{
|
||||
return "run a bash shell that provides the build environment of a derivation";
|
||||
}
|
||||
|
||||
Examples examples() override
|
||||
{
|
||||
return {
|
||||
Example{
|
||||
"To get the build environment of GNU hello:",
|
||||
"nix dev-shell nixpkgs.hello"
|
||||
},
|
||||
Example{
|
||||
"To store the build environment in a profile:",
|
||||
"nix dev-shell --profile /tmp/my-shell nixpkgs.hello"
|
||||
},
|
||||
Example{
|
||||
"To use a build environment previously recorded in a profile:",
|
||||
"nix dev-shell /tmp/my-shell"
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
void run(ref<Store> store) override
|
||||
{
|
||||
auto buildEnvironment = getBuildEnvironment(store);
|
||||
|
||||
auto [rcFileFd, rcFilePath] = createTempFile("nix-shell");
|
||||
|
||||
std::ostringstream ss;
|
||||
makeRcScript(buildEnvironment, ss);
|
||||
|
||||
ss << fmt("rm -f '%s'\n", rcFilePath);
|
||||
|
||||
if (!command.empty()) {
|
||||
std::vector<std::string> args;
|
||||
for (auto s : command)
|
||||
args.push_back(shellEscape(s));
|
||||
ss << fmt("exec %s\n", concatStringsSep(" ", args));
|
||||
}
|
||||
|
||||
writeFull(rcFileFd.get(), ss.str());
|
||||
|
||||
stopProgressBar();
|
||||
|
||||
auto shell = getEnv("SHELL").value_or("bash");
|
||||
|
||||
setEnviron();
|
||||
|
||||
auto args = Strings{std::string(baseNameOf(shell)), "--rcfile", rcFilePath};
|
||||
|
||||
restoreAffinity();
|
||||
restoreSignals();
|
||||
|
||||
execvp(shell.c_str(), stringsToCharPtrs(args).data());
|
||||
|
||||
throw SysError("executing shell '%s'", shell);
|
||||
}
|
||||
};
|
||||
|
||||
struct CmdPrintDevEnv : Common
|
||||
{
|
||||
std::string description() override
|
||||
{
|
||||
return "print shell code that can be sourced by bash to reproduce the build environment of a derivation";
|
||||
}
|
||||
|
||||
Examples examples() override
|
||||
{
|
||||
return {
|
||||
Example{
|
||||
"To apply the build environment of GNU hello to the current shell:",
|
||||
". <(nix print-dev-env nixpkgs.hello)"
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
void run(ref<Store> store) override
|
||||
{
|
||||
auto buildEnvironment = getBuildEnvironment(store);
|
||||
|
||||
stopProgressBar();
|
||||
|
||||
makeRcScript(buildEnvironment, std::cout);
|
||||
}
|
||||
};
|
||||
|
||||
static auto r1 = registerCommand<CmdPrintDevEnv>("print-dev-env");
|
||||
static auto r2 = registerCommand<CmdDevShell>("dev-shell");
|
||||
Loading…
Reference in a new issue