Commit graph

1256 commits

Author SHA1 Message Date
Eelco Dolstra 98ef11677c EvalState::callFunction(): Make FunctionCallTrace use less stack space
The FunctionCallTrace object consumes a few hundred bytes of stack
space, even when tracing is disabled. This was causing stack overflows:

  $ nix-instantiate '<nixpkgs> -A texlive.combined.scheme-full --dry-run
  error: stack overflow (possible infinite recursion)

This is with the default stack size of 8 MiB.

Putting the object on the heap reduces stack usage to < 5 MiB.
2019-12-10 13:32:30 +01:00
Eelco Dolstra 0678e4d56a Move #include
(cherry picked from commit 8beedd4486)
2019-12-05 20:30:29 +01:00
Eelco Dolstra 79142cbbe1 Bindings: Add convenience method for requiring an attribute
(cherry picked from commit fb692e5f7b)
2019-12-05 20:29:15 +01:00
Eelco Dolstra 0d118ef0c9 Bindings::get(): Add convenience method
This allows writing attribute lookups as

    if (auto name = value.attrs->get(state.sName))
      ...

(cherry picked from commit f216c76c56)
2019-12-05 20:29:00 +01:00
Eelco Dolstra c3c23a52ee Merge remote-tracking branch 'origin/master' into flakes 2019-12-04 00:31:09 +01:00
Eelco Dolstra f102d793f1
Merge pull request #2748 from edolstra/rust
Make nix/unpack-channel.nix a builtin builder
2019-11-29 19:33:31 +01:00
Eelco Dolstra 2d6f1ddbb5
Remove builtins.valueSize
Fixes #3246.
2019-11-28 13:52:42 +01:00
Eelco Dolstra 8918bae098 Drop remaining uses of external "tar"
Also, fetchGit now runs in O(1) memory since we pipe the output of
'git archive' directly into unpackTarball() (rather than first reading
it all into memory).
2019-11-26 22:07:28 +01:00
Eelco Dolstra 872740cf60
Merge pull request #3238 from puckipedia/attrset-overrides-dynamic
Ensure enough space in attrset bindings
2019-11-26 20:14:55 +01:00
Eelco Dolstra 1ec6e6e11e
Add feature to disable URL literals
E.g.

  $ nix-build '<nixpkgs>' -A hello --experimental-features no-url-literals
  error: URL literals are disabled, at /nix/store/vsjamkzh15r3c779q2711az826hqgvzr-nixpkgs-20.03pre194957.bef773ed53f/nixpkgs/pkgs/top-level/all-packages.nix:1236:11

Helps with implementing https://github.com/NixOS/rfcs/pull/45.
2019-11-26 19:48:34 +01:00
puck cd55f91ad2 Ensure enough space in attrset bindings when using both __overrides and dynamic attributes 2019-11-25 12:37:14 +00:00
Eelco Dolstra d12d69ea1a
Turn NIX_PATH into a config setting
This allows it to be set in nix.conf.
2019-11-22 23:07:35 +01:00
Eelco Dolstra ec9dd9a5ae
Provide a default value for NIX_PATH 2019-11-22 22:08:51 +01:00
Eelco Dolstra ba87b08f85
getEnv(): Return std::optional
This allows distinguishing between an empty value and no value.
2019-11-22 16:18:13 +01:00
Eelco Dolstra fd8ee94ab2 Remove #include 2019-11-20 13:04:39 +01:00
Eelco Dolstra 8beedd4486 Move #include 2019-11-20 13:04:39 +01:00
Eelco Dolstra 5ee23c35b9
Merge pull request #3219 from Ericson2314/semicolons
Fix extra semicolons warnings
2019-11-11 12:13:51 +01:00
John Ericson 4c34054673 Remove unneeded semicolons 2019-11-10 11:24:47 -05:00
John Ericson 96e6e680c1 Fix extra ; warnings involving MakeError 2019-11-10 11:24:47 -05:00
Peter Kolloch 2ba9f22715
De-duplicate struct PrimOp forward declaration 2019-11-10 10:02:22 +01:00
Eelco Dolstra e491efe9fb
Use more stable registry URL 2019-11-06 14:20:16 +01:00
Eelco Dolstra d5f1cc3e94
Use revcount/last-modified for computing the flake fingerprint
The store path is not enough. For example, when we build a dirty tree,
commit, and build the clean tree, a re-evaluation is necessary because
the flake may depend on the lastModified or revCount attributes.
2019-11-06 12:01:37 +01:00
Eelco Dolstra 88c452d160
Merge remote-tracking branch 'origin/master' into flakes 2019-11-06 10:56:33 +01:00
Eelco Dolstra 852554bb16
Merge branch 'nix-repl-e' of https://github.com/zimbatm/nix 2019-11-05 11:20:53 +01:00
Eelco Dolstra 72748b4088
Merge pull request #3173 from mkenigs/typo
fix typo
2019-11-05 11:17:26 +01:00
Eelco Dolstra b81d9d26f5
Merge remote-tracking branch 'origin/master' into flakes 2019-11-04 22:29:31 +01:00
Benjamin Hipple 80d5ec6ff4 Minor updates to inline comments
Add missing docstring on InstallableCommand. Also, some of these were wrapped
when they're right next to a line longer than the unwrapped line, so we can just
unwrap them to save vertical space.
2019-10-31 05:56:37 -04:00
Janne Heß 2d1d1e3083 Replace git show with git log
git show seems to print the entire tag message when being called on a tag
instead of a commit. git log instead always prints the correct timestamp
in my tests.
The error nix prints is: `error: stoull`.
2019-10-30 17:15:38 +01:00
matthew e0bcacf79f fix typo 2019-10-28 18:02:47 -05:00
Jonas Chevalier 9a25059656
findDerivationFilename: add FIXME 2019-10-28 21:40:02 +01:00
Jonas Chevalier ec448f8bb6
libexpr: findDerivationFilename return Pos instead of tuple 2019-10-28 21:29:54 +01:00
Eelco Dolstra e012384fe9
Merge branch 'tojson-tostring-fix' of https://github.com/mayflower/nix 2019-10-27 12:18:35 +01:00
Robin Gloster e583df5280
builtins.toJSON: fix __toString usage 2019-10-27 10:15:51 +01:00
Jonas Chevalier 59c7249769
libexpr: add findDerivationFilename
extract the derivation to filename:lineno heuristic
2019-10-23 17:21:16 +02:00
Eelco Dolstra 1e23b82a53 exportGitHub(): Don't rely on the ETag from GitHub
We relied on it being the Git revision, but that stopped being the
case.
2019-10-21 23:14:29 +02:00
Eelco Dolstra 45b740c18b Use upstream json_fwd.hpp to speed up compilation 2019-10-21 22:11:21 +02:00
Eelco Dolstra a07da2fd7a Don't ignore revs/refs of local flakerefs
Fixes

  error: the content hash of flake '/home/eelco/Dev/nixpkgs-flake?ref=HEAD&rev=0000000000000000000000000000000000000000' doesn't match the hash recorded in the referring lockfile
2019-10-21 14:57:01 +02:00
Eelco Dolstra 8e478c2341
Add experimental-features setting
Experimental features are now opt-in. There are currently two
experimental features: "nix-command" (which enables the "nix"
command), and "flakes" (which enables support for flakes). This will
allow us to merge experimental features more quickly, without
committing to supporting them indefinitely.

Typical usage:

$ nix build --experimental-features 'nix-command flakes' nixpkgs#hello
2019-10-16 17:49:01 +02:00
Eelco Dolstra 0ab64729e9 Improve GitHub caching
In particular, when building a flake lock file, inputs like 'nixpkgs'
are now downloaded only once. Previously, it would fetch
https://api.github.com/repos/<owner>/<repo>/tarball/<ref> and then
later https://api.github.com/repos/<owner>/<repo>/tarball/<rev>, even
though they produce the same result.

Git and GitHub now also share a cache that maps revs to a store path
and other info.
2019-10-16 00:20:51 +02:00
Eelco Dolstra e99bb91217
Merge remote-tracking branch 'origin/master' into flakes 2019-10-10 12:54:37 +02:00
Eelco Dolstra 926d3e5bb0
Fix Bison 2.4 warning 2019-10-09 22:57:37 +02:00
Eelco Dolstra 99b73fb507
OCD performance fix: {find,count}+insert => insert 2019-10-09 16:06:29 +02:00
Eelco Dolstra 21304c11f9
uri -> url for consistency 2019-10-08 17:00:55 +02:00
Eelco Dolstra a15f9b37eb
fetchGit: Support Git trees without any commits
Fixes

  $ nix build
  fatal: bad revision 'HEAD'
  error: program 'git' failed with exit code 128

on a new flake. It is now detected as a dirty tree with revCount = 0.
2019-10-07 15:44:32 +02:00
Eelco Dolstra a323b7826c
Merge remote-tracking branch 'origin/master' into flakes 2019-10-04 17:26:32 +02:00
Eelco Dolstra 90d6018509
Fix aborts when using builtins.getFlake
In that case, 'self' could refer to a value on the stack, so accessing
'self.rev' would abort.
2019-10-02 22:08:19 +02:00
Eelco Dolstra 168a887916
Fix fetchTarball with chroot stores
Fixes #2405.
2019-10-01 07:51:06 +00:00
Eelco Dolstra 15b888c9a5
cmatch -> smatch 2019-09-27 15:31:09 +02:00
Eelco Dolstra 454e3a541a
Fix sorting of non-flake input attributes 2019-09-26 17:51:51 +02:00
Eelco Dolstra bd79c1f6f6 Don't catch exceptions by value
(cherry picked from commit 893be6f5e3)
2019-09-22 21:56:56 +02:00
Eelco Dolstra 893be6f5e3 Don't catch exceptions by value 2019-09-22 21:29:33 +02:00
Eelco Dolstra 5961c94097 Flake alias -> id 2019-09-20 14:46:37 +02:00
Eelco Dolstra 68e0f23edc Add flags to disallow dirty Git trees and to turn off warnings 2019-09-20 14:29:49 +02:00
Eelco Dolstra aeb7148afd
Some effort to minimize flake dependencies
For example, if the top-level flake depends on
"nixpkgs/release-19.03", and one of its dependencies depends on
"nixpkgs", then the latter will be mapped to "nixpkgs/release-19.03",
rather than whatever the default branch of "nixpkgs" is. Thus you get
only one "nixpkgs" dependency rather than two.

This currently only works in a breadth-first way, so the other way
around (i.e. if the top-level flake depends on "nixpkgs", and a
dependency depends on "nixpkgs/release-19.03") still results in two
"nixpkgs" dependencies.
2019-09-18 23:59:45 +02:00
Jonas Chevalier 619cc4af85
function-trace: always show the trace
If the user invokes nix with --trace-function-calls it means that they
want to see the trace.
2019-09-18 23:23:21 +02:00
Eelco Dolstra c67407172d
Record original flakerefs in the lock file again
If 'input.<name>.uri' changes, then the entry in the lockfile for
input <name> should be considered stale.

Also print some messages when lock file entries are added/updated.
2019-09-18 21:57:57 +02:00
Eelco Dolstra f97d3753a1
Require flake.nix to be an attrset (not a non-trivial thunk) 2019-09-09 17:34:38 +02:00
Eelco Dolstra c87840ae14
Don't allow arbitrary computations in flake attributes
E.g. you can write 'edition = 201909' but not 'edition = 201909 + 0'.

Fixes #3075.
2019-09-09 16:34:44 +02:00
Eelco Dolstra 2fa7f2a56a
Use git+ prefix in flake URI schemes
Fixes #3045.
2019-09-05 17:15:09 +02:00
Eelco Dolstra 61fdb16aac
Improve error message when a directory is not a flake
So you now get

  $ nix build
  error: path '.' is not a flake (because it does not reference a Git repository)

rather than

  $ nix build
  error: unsupported argument '.'
2019-09-02 17:35:35 +02:00
Eelco Dolstra a49b6761a5 Fix sourceInfo 2019-08-30 17:27:51 +02:00
Eelco Dolstra 80c36d4562 Remove 'name' attribute from flakes
This is no longer needed since flakes are given an identity in the
'inputs' attribute.
2019-08-30 16:38:27 +02:00
Eelco Dolstra 30ccf4e52d Turn flake inputs into an attrset
Instead of a list, inputs are now an attrset like

  inputs = {
    nixpkgs.uri = github:NixOS/nixpkgs;
  };

If 'uri' is omitted, than the flake is a lookup in the flake registry, e.g.

  inputs = {
    nixpkgs = {};
  };

but in that case, you can also just omit the input altogether and
specify it as an argument to the 'outputs' function, as in

  outputs = { self, nixpkgs }: ...

This also gets rid of 'nonFlakeInputs', which are now just a special
kind of input that have a 'flake = false' attribute, e.g.

  inputs = {
    someRepo = {
      uri = github:example/repo;
      flake = false;
    };
  };
2019-08-30 16:27:51 +02:00
Eelco Dolstra 2341f30ec6 Clean up the 'outputs' interface 2019-08-30 13:06:23 +02:00
Eelco Dolstra 89468410d5 Extract flake dependencies from the 'outputs' arguments
That is, instead of

  inputs = [ "nixpkgs" ];

  outputs = inputs: ... inputs.nixpkgs ...;

you can write

  outputs = { nixpkgs }: ... inputs.nixpkgs ...;
2019-08-30 11:22:34 +02:00
Eelco Dolstra ebc4dae517 Merge remote-tracking branch 'origin/master' into flakes 2019-08-29 16:11:38 +02:00
Graham Christensen ee9c988a1b
Track function start and ends for flame graphs
With this patch, and this file I called `log.py`:

    #!/usr/bin/env nix-shell
    #!nix-shell -i python3 -p python3 --pure

    import sys
    from pprint import pprint

    stack = []
    timestack = []

    for line in open(sys.argv[1]):
        components = line.strip().split(" ", 2)
        if components[0] != "function-trace":
            continue

        direction = components[1]
        components = components[2].rsplit(" ", 2)

        loc = components[0]
        _at = components[1]
        time = int(components[2])

        if direction == "entered":
            stack.append(loc)
            timestack.append(time)
        elif direction == "exited":
            dur = time - timestack.pop()
            vst = ";".join(stack)
            print(f"{vst} {dur}")
            stack.pop()

and:

    nix-instantiate --trace-function-calls -vvvv ../nixpkgs/pkgs/top-level/release.nix -A unstable > log.matthewbauer 2>&1
    ./log.py ./log.matthewbauer > log.matthewbauer.folded
    flamegraph.pl --title matthewbauer-post-pr log.matthewbauer.folded > log.matthewbauer.folded.svg

I can make flame graphs like: http://gsc.io/log.matthewbauer.folded.svg

---

Includes test cases around function call failures and tryEval. Uses
RAII so the finish is always called at the end of the function.
2019-08-14 16:09:35 -04:00
Eelco Dolstra 1d750e0587
Merge remote-tracking branch 'origin/master' into flakes 2019-08-08 15:49:13 +02:00
Bas van Dijk 89865144c3 Allow builtins.pathExists to check the existence of /nix/store paths
This makes it consitent with builtins.readDir.
2019-07-30 11:27:35 +02:00
Eelco Dolstra b29cec7697
Don't write lock files if they have dirty inputs 2019-07-12 13:29:54 +02:00
Eelco Dolstra bd62290c23
fetchGit: Warn about dirty trees 2019-07-12 12:59:00 +02:00
Eelco Dolstra 0802e006f2
Use "git add --force --intent-to-add" for flake.lock
Fixes

  The following paths are ignored by one of your .gitignore files:
  flake.lock
2019-07-11 17:05:53 +02:00
Eelco Dolstra ad42a78469
Rename 'epoch' -> 'edition' 2019-07-11 13:54:53 +02:00
Eelco Dolstra b0c220c02e
Check for epochs < 201906 2019-07-10 10:27:33 +02:00
Eelco Dolstra cc218b15ba Merge remote-tracking branch 'origin/master' into flakes 2019-07-06 21:06:22 +02:00
Eelco Dolstra 33db1d35ae
Merge pull request #2582 from LnL7/fetchgit-refs
fetchGit: allow fetching explicit refs
2019-07-02 15:44:31 +02:00
Eelco Dolstra 2cc248c4fd
Merge remote-tracking branch 'origin/master' into flakes 2019-06-25 14:27:57 +02:00
Eelco Dolstra 64ec087f58
Fix 32-bit overflow with --no-net
--no-net causes tarballTtl to be set to the largest 32-bit integer,
which causes comparison like 'time + tarballTtl < other_time' to
fail on 32-bit systems. So cast them to 64-bit first.

https://hydra.nixos.org/build/95076624
(cherry picked from commit 29ccb2e969)
2019-06-24 22:16:43 +02:00
Eelco Dolstra f8b30338ac
Refactor downloadCached() interface
(cherry picked from commit df3f5a78d5)
2019-06-24 22:12:26 +02:00
Eelco Dolstra b43e1e186e
CachedDownloadResult: Include store path
Also, make fetchGit and fetchMercurial update allowedPaths properly.

(Maybe the evaluator, rather than the caller of the evaluator, should
apply toRealPath(), but that's a bigger change.)

(cherry picked from commit 5c34d66538)
2019-06-24 21:59:27 +02:00
Eelco Dolstra dc29e9fb47
downloadCached: Return ETag
(cherry picked from commit 529add316c)
2019-06-24 21:58:33 +02:00
Eelco Dolstra 94f11d0a61
Fix abort in fromTOML
Fixes #2969.
2019-06-24 17:09:09 +02:00
Eelco Dolstra d4fe9daed6
Simplify getFlake() / fetchFlake() logic 2019-06-21 19:04:58 +02:00
Eelco Dolstra aa2846198f
Don't update the global registry when building a locked flake
It's unnecessary and slows things down (e.g. when you're on a Thalys
with super-crappy Internet).
2019-06-21 18:34:43 +02:00
Eelco Dolstra d132d057a8
Handle store symlinks in flake directories
E.g. 'nix path-info ./result' inside a flake directory now works
again.
2019-06-21 15:29:05 +02:00
Eelco Dolstra 29ccb2e969
Fix 32-bit overflow with --no-net
--no-net causes tarballTtl to be set to the largest 32-bit integer,
which causes comparison like 'time + tarballTtl < other_time' to
fail on 32-bit systems. So cast them to 64-bit first.

https://hydra.nixos.org/build/95076624
2019-06-21 12:53:52 +02:00
Eelco Dolstra e75ffbf04a
Merge pull request #2937 from CSVdB/fuzzymatching-v2
FuzzyMatching works
2019-06-18 18:03:38 +02:00
Nick Van den Broeck 59714a15e0 FuzzyMatching works
Fixes #2843
2019-06-18 17:01:57 +02:00
Eelco Dolstra 9d1207c02c
nix flake check: Check apps 2019-06-17 17:59:57 +02:00
Eelco Dolstra 06010eaf19
Fix fetchTarball with chroot stores
Fixes #2405.
2019-06-12 10:34:13 +02:00
Eelco Dolstra 69b047f4ce
writeRegistry(): Write correct version 2019-06-11 21:32:57 +02:00
Eelco Dolstra c47d2dac6c
Disable EvalCache in impure mode 2019-06-07 22:38:39 +02:00
Eelco Dolstra 6644b6099b
Add flake evaluation cache
This exploits the hermetic nature of flake evaluation to speed up
repeated evaluations of a flake output attribute.

For example (doing 'nix build' on an already present package):

  $ time nix build nixpkgs:firefox

  real    0m1.497s
  user    0m1.160s
  sys     0m0.139s

  $ time nix build nixpkgs:firefox

  real    0m0.052s
  user    0m0.038s
  sys     0m0.007s

The cache is ~/.cache/nix/eval-cache-v1.sqlite, which has entries like

  INSERT INTO Attributes VALUES(
    X'92a907d4efe933af2a46959b082cdff176aa5bfeb47a98fabd234809a67ab195',
    'packages.firefox',
    1,
    '/nix/store/pbalzf8x19hckr8cwdv62rd6g0lqgc38-firefox-67.0.drv /nix/store/g6q0gx0v6xvdnizp8lrcw7c4gdkzana0-firefox-67.0 out');

where the hash 92a9... is a fingerprint over the flake store path and
the contents of the lockfile. Because flakes are evaluated in pure
mode, this uniquely identifies the evaluation result.
2019-06-07 22:25:48 +02:00
Eelco Dolstra 54aff8430c
Move flake-related stuff to src/libexpr/flake 2019-06-05 16:51:54 +02:00
Eelco Dolstra 1b05792988
Shorter syntax for referencing flake outputs
Fixes #2819.
2019-06-04 22:35:43 +02:00
Eelco Dolstra ce225615c3
Eliminate duplicate fetching of the top-level flake 2019-06-04 21:10:53 +02:00
Eelco Dolstra 087530dec4
Add comments 2019-06-04 21:07:55 +02:00
Eelco Dolstra 1e53a07712
Make non-flake inputs lazy
Also add a proper test for non-flake inputs.
2019-06-04 20:56:42 +02:00
Eelco Dolstra 1c5067b9a7
Check hash 2019-06-04 20:35:35 +02:00
Eelco Dolstra 5fe7be2409
Rename dep -> input
Also use nlohmann::json range-based for.
2019-06-04 20:08:13 +02:00