Commit graph

744 commits

Author SHA1 Message Date
Eelco Dolstra
dae6a267a8
Merge pull request #3625 from gilligan/xml-writer-tests
Add unit tests for xml-writer
2020-05-27 11:07:53 +02:00
Tobias Pflug
4b388e8431 Add unit tests for xml-writer 2020-05-25 18:34:55 +02:00
Tobias Pflug
ecc5c90dfc Add unit tests for hashing functions 2020-05-25 11:50:41 +02:00
Tobias Pflug
a73a820a5d Add unit testes for url.cc
This adds tests for

- parseURL
- percentDecode
- decodeQuery
2020-05-20 16:37:35 +02:00
Tobias Pflug
181a47d884 Enable toLower umlauts test
Update comment and enable the test
2020-05-08 15:13:55 +02:00
Tobias Pflug
2191141274 Enable baseNameOf test
Add note about removal of trailing slashes in the doc comment of
baseNameOf and enabled the test.
2020-05-08 15:07:40 +02:00
Tobias Pflug
e3df9c2a6e Enable dirOf test
Adjusted the doc comment for `dirOf` to reflect the implementation
behavior.
2020-05-08 15:03:44 +02:00
Eelco Dolstra
5b8883faac
configure: Look for gtest 2020-05-08 12:09:37 +02:00
Eelco Dolstra
ca657525b8
Don't install unit tests 2020-05-08 12:03:27 +02:00
Eelco Dolstra
7898cdb75a
make check: Run unit tests 2020-05-08 11:49:40 +02:00
Eelco Dolstra
72b9d971bc
Fix warning 2020-05-08 11:35:57 +02:00
Eelco Dolstra
7cc7cef950
Move unit tests to sr/libutil/tests, use mk make rules 2020-05-08 11:34:09 +02:00
Tobias Pflug
1f3602a2c9 Remove replaceInSet
The function isn't being used anywhere so it seems safe to remove
2020-05-07 18:15:13 +02:00
Eelco Dolstra
74a1bfdcab
Merge pull request #3546 from guibou/nix_readfile_on_0_sized_files
builtins.readFile: do not truncate content
2020-05-06 11:33:55 +02:00
Eelco Dolstra
fd4911269f
Revert "Merge pull request #3558 from LnL7/ssh-ng-stderr"
This reverts commit 3ebfbecdd1, reversing
changes made to c089c52d5f.

https://github.com/NixOS/nix/pull/3558
2020-05-06 10:54:18 +02:00
Eelco Dolstra
f132d82a79 nix --help: Group commands 2020-05-05 15:18:23 +02:00
Eelco Dolstra
a721a0b114 Flag: Use designated initializers 2020-05-04 22:40:19 +02:00
Daiderd Jordan
4769eea5e2
logging: handle build log lines in simple logger
The raw stderr output isn't logged anymore so the build logs need to be
printed by the default logger in order for the old commands like
nix-build to still show build output.
2020-05-02 23:40:53 +02:00
Guillaume Bouchard
2e5be2a749 StringSink pre allocate
When used with `readFile`, we have a pretty good heuristic of the file
size, so `reserve` this in the `string`. This will save some allocation
/ copy when the string is growing.
2020-04-29 18:44:01 +02:00
Guillaume Bouchard
7afcb5af98 Remove the drain argument from readFile
Now it is always `drain` (see previous commit).
2020-04-29 18:43:45 +02:00
Guillaume Bouchard
5a34a473dd builtins.readFile: do not truncate content
This closes #3026 by allowing `builtins.readFile` to read a file with a
wrongly reported file size, for example, files in `/proc` may report a
file size of 0. Reading file in `/proc` is not a good enough motivation,
however I do think it just makes nix more robust by allowing more file
to be read.  Especially, I do considerer the previous behavior to be
dangerous because nix was previously reading truncated files. Examples
of file system which incorrectly report file size may be network file
system or dynamic file system (for performance reason, a dynamic file
system such as FUSE may generate the content of the file on demand).

```
nix-repl> builtins.readFile "/proc/version"
""
```

With this commit:

```
nix-repl> builtins.readFile "/proc/version"
"Linux version 5.6.7 (nixbld@localhost) (gcc version 9.3.0 (GCC)) #1-NixOS SMP Thu Apr 23 08:38:27 UTC 2020\n"
```

Here is a summary of the behavior changes:

- If the reported size is smaller, previous implementation
was silently returning a truncated file content. The new implementation
is returning the correct file content.

- If a file had a bigger reported file size, previous implementation was
failing with an exception, but the new implementation is returning the
correct file content. This change of behavior is coherent with this pull
request.

Open questions

- The behavior is unchanged for correctly reported file size, however
performances may vary because it uses the more complex sink interface.
Considering that sink is used a lot, I don't think this impacts the
performance a lot.
- `builtins.readFile` on an infinite file, such as `/dev/random` may
fill the memory.
- it does not support adding file to store, such as `${/proc/version}`.
2020-04-29 14:50:52 +02:00
Alyssa Ross
c05e20daa1
Fix long paths permanently breaking GC
Suppose I have a path /nix/store/[hash]-[name]/a/a/a/a/a/[...]/a,
long enough that everything after "/nix/store/" is longer than 4096
(MAX_PATH) bytes.

Nix will happily allow such a path to be inserted into the store,
because it doesn't look at all the nested structure.  It just cares
about the /nix/store/[hash]-[name] part.  But, when the path is deleted,
we encounter a problem.  Nix will move the path to /nix/store/trash, but
then when it's trying to recursively delete the trash directory, it will
at some point try to unlink
/nix/store/trash/[hash]-[name]/a/a/a/a/a/[...]/a.  This will fail,
because the path is too long.  After this has failed, any store deletion
operation will never work again, because Nix needs to delete the trash
directory before recreating it to move new things to it.  (I assume this
is because otherwise a path being deleted could already exist in the
trash, and then moving it would fail.)

This means that if I can trick somebody into just fetching a tarball
containing a path of the right length, they won't be able to delete
store paths or garbage collect ever again, until the offending path is
manually removed from /nix/store/trash.  (And even fixing this manually
is quite difficult if you don't understand the issue, because the
absolute path that Nix says it failed to remove is also too long for
rm(1).)

This patch fixes the issue by making Nix's recursive delete operation
use unlinkat(2).  This function takes a relative path and a directory
file descriptor.  We ensure that the relative path is always just the
name of the directory entry, and therefore its length will never exceed
255 bytes.  This means that it will never even come close to AX_PATH,
and Nix will therefore be able to handle removing arbitrarily deep
directory hierachies.

Since the directory file descriptor is used for recursion after being
used in readDirectory, I made a variant of readDirectory that takes an
already open directory stream, to avoid the directory being opened
multiple times.  As we have seen from this issue, the less we have to
interact with paths, the better, and so it's good to reuse file
descriptors where possible.

I left _deletePath as succeeding even if the parent directory doesn't
exist, even though that feels wrong to me, because without that early
return, the linux-sandbox test failed.

Reported-by: Alyssa Ross <hi@alyssa.is>
Thanks-to: Puck Meerburg <puck@puckipedia.com>
Tested-by: Puck Meerburg <puck@puckipedia.com>
Reviewed-by: Puck Meerburg <puck@puckipedia.com>
2020-04-27 20:50:17 +00:00
Eelco Dolstra
c9d0cf7e02
Don't include error.hh in util.hh to prevent header bloat 2020-04-22 15:29:27 +02:00
Eelco Dolstra
16e3bf4537
Merge branch 'error-format' of https://github.com/bburdette/nix 2020-04-22 15:29:10 +02:00
Ben Burdette
12814806ef iomanip no longer needed 2020-04-16 10:48:15 -06:00
Eelco Dolstra
67a5941472 Logger: Add method for writing to stdout
Usually this just writes to stdout, but for ProgressBar, we need to
clear the current line, write the line to stdout, and then redraw the
progress bar.

(cherry picked from commit 696c026006)
2020-04-16 18:03:38 +02:00
Ben Burdette
96262e744e switch to structs, which don't need public: 2020-04-16 09:55:38 -06:00
Ben Burdette
057e5b6b2e move implementation to cc 2020-04-15 10:09:43 -06:00
Ben Burdette
adf03b0b8e Merge branch 'initializer-style' into error-format 2020-04-15 10:06:20 -06:00
zimbatm
895516cadf
add NIX_USER_CONF_FILES
Motivation: maintain project-level configuration files.

Document the whole situation a bit better so that it corresponds to the
implementation, and add NIX_USER_CONF_FILES that allows overriding
which user files Nix will load during startup.
2020-04-14 18:45:06 +02:00
Nikola Knezevic
c330109bfa DataTransfer -> FileTransfer 2020-04-08 22:26:57 +02:00
Nikola Knezevic
a0c5931208 actDownload -> actDataTransfer 2020-04-08 22:26:57 +02:00
Ben Burdette
805ffe1bc9 indention 2020-04-08 11:33:46 -06:00
Ben Burdette
8c2bf15c4f format -> fmt 2020-04-08 11:17:02 -06:00
Ben Burdette
555baa8fb0 comments 2020-04-08 09:56:10 -06:00
Ben Burdette
54f91923c8 return of NixCode 2020-04-08 09:48:21 -06:00
Ben Burdette
47ed067d45 initializer style 2020-04-08 09:07:58 -06:00
Ben Burdette
00c507cc52 columnRange -> column 2020-04-07 14:36:32 -06:00
Ben Burdette
20c0984a46 remove columnrange; switch to fmt in error.cc 2020-04-07 10:14:15 -06:00
Eelco Dolstra
462421d345 Backport libfetchers from the flakes branch
This provides a pluggable mechanism for defining new fetchers. It adds
a builtin function 'fetchTree' that generalizes existing fetchers like
'fetchGit', 'fetchMercurial' and 'fetchTarball'. 'fetchTree' takes a
set of attributes, e.g.

  fetchTree {
    type = "git";
    url = "https://example.org/repo.git";
    ref = "some-branch";
    rev = "abcdef...";
  }

The existing fetchers are just wrappers around this. Note that the
input attributes to fetchTree are the same as flake input
specifications and flake lock file entries.

All fetchers share a common cache stored in
~/.cache/nix/fetcher-cache-v1.sqlite. This replaces the ad hoc caching
mechanisms in fetchGit and download.cc (e.g. ~/.cache/nix/{tarballs,git-revs*}).

This also adds support for Git worktrees (c169ea5904).
2020-04-07 09:03:14 +02:00
Ben Burdette
55c96b64e4 comment cleanup 2020-04-06 20:14:48 -06:00
Ben Burdette
ec449c8450 constructor style basically working 2020-04-06 19:43:22 -06:00
Ben Burdette
216263c36f Merge branch 'master' into error-format 2020-04-06 10:00:00 -06:00
Ben Burdette
9bb528d392 handle Pos instead of individual file/line/columnrange args 2020-04-03 13:15:59 -06:00
Ben Burdette
7b7801d3f0 variadic args for hint format 2020-04-03 08:48:20 -06:00
Ben Burdette
c6b3fcddb0 formatted with astyle 2020-04-02 16:02:40 -06:00
Ben Burdette
1c329ca433 indenting 2020-04-02 14:25:43 -06:00
Ben Burdette
e697884f65 using std:: everywhere; fix a formatting error; add exception flags 2020-04-01 21:30:19 -06:00
Ben Burdette
dd7b8183a5 indenting 2020-04-01 16:20:20 -06:00
Ben Burdette
8713aeac5e remove using std::*, switch to include guard 2020-04-01 15:51:14 -06:00