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Substitutions from different store dirs
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This adds a ‘nix export’ command which hooks into nix-bundle. It can
be used in a similar way as nix-bundle, with the benefit of hooking
into the new “app” functionality. For instance,
$ nix export nixpkgs#jq
$ ./jq --help
jq - commandline JSON processor [version 1.6]
...
$ scp jq machine-without-nix:
$ ssh machine-without-nix ./jq
jq - commandline JSON processor [version 1.6]
...
Note that nix-bundle currently requires Linux to run. Other exporters
might not have that requirement.
“exporters” are meant to be reusable, so that, other repos can
implement their own bundling.
Fixes #3705
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Prevent nix-build from accepting nix-shell flags
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Merge legacy `fetchGit`-builtin with the generic `fetchTree`-function
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Set regex_constants::match_continuous for quicker search in nix develop
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Fix RemoteStore::addToStore() latency
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match_continuous limits the search to the current start position,
instead of searching the entire file.
On libc++, this improves performance dramatically:
$ time /nix/store/70ai68dfm6xbzwn26j5n4li9di52ylia-nix-3.0pre20200728_c159f48/bin/nix print-dev-env >/dev/null
/nix/store/70ai68dfm6xbzwn26j5n4li9di52ylia-nix-3.0pre20200728_c159f48/bin/ni 2.39s user 0.19s system 64% cpu 4.032 total
$ time /nix/store/cwjfxxlp83zln4mfyy1d2dbsx7f6s962-nix-3.0pre20200728_dirty/bin/nix print-dev-env >/dev/null
/nix/store/cwjfxxlp83zln4mfyy1d2dbsx7f6s962-nix-3.0pre20200728_dirty/bin/nix 0.09s user 0.05s system 65% cpu 0.204 total
Fixes #3874
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Since 6185d25e523a3cd223dd6f6aca10cf6ff15b4823, this was very
latency-bound since it required a round-trip for every 32 KiB. So for
example copying a 514 MiB closure over a virtual ethernet device with
a articial delay of just 1 ms took 343s. Now it takes 2.7s.
Fixes #3372.
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If a repo is dirty, it used to return a `rev` object with an "empty"
sha1 (0000000000000000000000000000000000000000). Please note that this
only applies for `builtins.fetchGit` and *not* for `builtins.fetchTree{
type = "git"; }`.
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new-interface-for-path-pathOpt
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The new interface we offer provides a way of getting all the
DerivationOutputs with the storePaths directly, based on the observation
that it's the most common usecase.
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istream->tellg() returns -1 so we can't get the number of bytes
written.
Fixes 'uploaded 's3://nix-cache/nar/00819r9lp5kajr6baxfw5dhhc0cx8ndxaz43qmd2f0gn1hk1ynlp.nar.xz' (-1 bytes) in 11620 ms' messages.
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Since there are some incompatible changes, it's better to bump the
major version number.
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The original idea was to implement a git-fetcher in Nix's core that
supports content hashes[1]. In #3549[2] it has been suggested to
actually use `fetchTree` for this since it's a fairly generic wrapper
over the new fetcher-API[3] and already supports content-hashes.
This patch implements a new git-fetcher based on `fetchTree` by
incorporating the following changes:
* Removed the original `fetchGit`-implementation and replaced it with an
alias on the `fetchTree` implementation.
* Ensured that the `git`-fetcher from `libfetchers` always computes a
content-hash and returns an "empty" revision on dirty trees (the
latter one is needed to retain backwards-compatibility).
* The hash-mismatch error in the fetcher-API exits with code 102 as it
usually happens whenever a hash-mismatch is detected by Nix.
* Removed the `flakes`-feature-flag: I didn't see a reason why this API
is so tightly coupled to the flakes-API and at least `fetchGit` should
remain usable without any feature-flags.
* It's only possible to specify a `narHash` for a `git`-tree if either a
`ref` or a `rev` is given[4].
* It's now possible to specify an URL without a protocol. If it's missing,
`file://` is automatically added as it was the case in the original
`fetchGit`-implementation.
[1] https://github.com/NixOS/nix/pull/3216
[2] https://github.com/NixOS/nix/pull/3549#issuecomment-625194383
[3] https://github.com/NixOS/nix/pull/3459
[4] https://github.com/NixOS/nix/pull/3216#issuecomment-553956703
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"create" as in read one in from a serialized form, or build one from
scratch in memory.
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derivation-primop-floating-output
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into misc-ca
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Hash always has a valid type
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better-ca-parse-errors
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into misc-ca
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obsidiansystems/optional-derivation-output-storepath
Only store hash in DerivationOutput for fixed output derivations
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ca-derivation-data-types
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optional-derivation-output-storepath
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Allow PRECOMPILE_HEADERS in cross-compilation
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In cross, CXX will look like aarch64-unknown-linux-gnu-g++. We could
run some command to check what kind of compiler it is, but for now we
can just check if g++ is anywhere in the string. I couldn’t find any
"ends with" for makefile, so it can be anywhere in CXX.
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