nix build: add --print-out-paths flag

has the same functionality as default nix-build

$ nix-build . -A "bash" -A "bash.dev" -A "tinycc"
/nix/store/4nmqxajzaf60yjribkgvj5j54x9yvr1r-bash-5.1-p12
/nix/store/c49i1ggnr5cc8gxmk9xm0cn961z104dn-bash-5.1-p12-dev
/nix/store/dbapb08862ajgaax3621fz8hly9fdah3-tcc-0.9.27+date=2022-01-11

$ nix-build . -A "bash"
/nix/store/4nmqxajzaf60yjribkgvj5j54x9yvr1r-bash-5.1-p12

$ $HOME/nixgits/nix/result/bin/nix build "nixpkgs#bash" "nixpkgs#bash.dev" "nixpkgs#tinycc" --print-out-paths
/nix/store/4nmqxajzaf60yjribkgvj5j54x9yvr1r-bash-5.1-p12
/nix/store/c49i1ggnr5cc8gxmk9xm0cn961z104dn-bash-5.1-p12-dev
/nix/store/dbapb08862ajgaax3621fz8hly9fdah3-tcc-0.9.27+date=2022-01-11

$ $HOME/nixgits/nix/result/bin/nix build "nixpkgs#bash" --print-out-paths
/nix/store/4nmqxajzaf60yjribkgvj5j54x9yvr1r-bash-5.1-p12
This commit is contained in:
Artturin 2022-03-19 20:16:05 +02:00
parent 2ffc5a4542
commit 51cfea8bb0
4 changed files with 42 additions and 0 deletions

View file

@ -2,3 +2,6 @@
* `nix repl` has a new build-'n-link (`:bl`) command that builds a derivation * `nix repl` has a new build-'n-link (`:bl`) command that builds a derivation
while creating GC root symlinks. while creating GC root symlinks.
* `nix build` has a new `--print-out-paths` flag to print the resulting output paths.
This matches the default behaviour of `nix-build`.

View file

@ -4,6 +4,7 @@
#include "shared.hh" #include "shared.hh"
#include "store-api.hh" #include "store-api.hh"
#include "local-fs-store.hh" #include "local-fs-store.hh"
#include "progress-bar.hh"
#include <nlohmann/json.hpp> #include <nlohmann/json.hpp>
@ -12,6 +13,7 @@ using namespace nix;
struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
{ {
Path outLink = "result"; Path outLink = "result";
bool printOutputPaths = false;
BuildMode buildMode = bmNormal; BuildMode buildMode = bmNormal;
CmdBuild() CmdBuild()
@ -31,6 +33,12 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
.handler = {&outLink, Path("")}, .handler = {&outLink, Path("")},
}); });
addFlag({
.longName = "print-out-paths",
.description = "Print the resulting output paths",
.handler = {&printOutputPaths, true},
});
addFlag({ addFlag({
.longName = "rebuild", .longName = "rebuild",
.description = "Rebuild an already built package and compare the result to the existing store paths.", .description = "Rebuild an already built package and compare the result to the existing store paths.",
@ -93,6 +101,22 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
}, buildable.raw()); }, buildable.raw());
} }
if (printOutputPaths) {
stopProgressBar();
for (auto & buildable : buildables) {
std::visit(overloaded {
[&](const BuiltPath::Opaque & bo) {
std::cout << store->printStorePath(bo.path) << std::endl;
},
[&](const BuiltPath::Built & bfd) {
for (auto & output : bfd.outputs) {
std::cout << store->printStorePath(output.second) << std::endl;
}
},
}, buildable.raw());
}
}
updateProfile(buildables); updateProfile(buildables);
} }
}; };

View file

@ -25,6 +25,13 @@ R""(
lrwxrwxrwx 1 … result-1 -> /nix/store/rkfrm0z6x6jmi7d3gsmma4j53h15mg33-cowsay-3.03+dfsg2 lrwxrwxrwx 1 … result-1 -> /nix/store/rkfrm0z6x6jmi7d3gsmma4j53h15mg33-cowsay-3.03+dfsg2
``` ```
* Build GNU Hello and print the resulting store path.
```console
# nix build nixpkgs#hello --print-out-paths
/nix/store/v5sv61sszx301i0x6xysaqzla09nksnd-hello-2.10
```
* Build a specific output: * Build a specific output:
```console ```console

View file

@ -34,6 +34,14 @@ outPath=$(readlink -f $TEST_ROOT/result)
grep 'FOO BAR BAZ' $TEST_ROOT/machine0/$outPath grep 'FOO BAR BAZ' $TEST_ROOT/machine0/$outPath
testPrintOutPath=$(nix build -L -v -f $file --print-out-paths --max-jobs 0 \
--arg busybox $busybox \
--store $TEST_ROOT/machine0 \
--builders "$(join_by '; ' "${builders[@]}")"
)
[[ $testPrintOutPath =~ store.*build-remote ]]
set -o pipefail set -o pipefail
# Ensure that input1 was built on store1 due to the required feature. # Ensure that input1 was built on store1 due to the required feature.