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view tests/test-bundle-type.t @ 39409:2fe21c65777e
internals: document CBOR utilization
I spoke with some people at Mozilla about CBOR and they advised me
that we should be careful about the subset of CBOR we use in order
to mitigate security, performance, and compatibility concerns.
This commit establishes a document that attempts to formalize our
use of CBOR.
Its main limitations are on what types are allowed. It explicitly
enumerates which types are supported. Notable missing features
include:
* Indefinite-length arrays and maps
* Text strings (bytes all the way)
* Floats
* Date/time types
* Big integers
* Use of indefinite-length byte strings for map keys, values in
containers.
If we have a need for any of these, we can have a discussion about
them when the time comes.
Differential Revision: https://phab.mercurial-scm.org/D4412
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Tue, 28 Aug 2018 20:27:36 -0700 |
parents | 326b174c6a47 |
children | 89630d0b3e23 |
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bundle w/o type option $ hg init t1 $ hg init t2 $ cd t1 $ echo blablablablabla > file.txt $ hg ci -Ama adding file.txt $ hg log | grep summary summary: a $ hg bundle ../b1 ../t2 searching for changes 1 changesets found $ cd ../t2 $ hg unbundle ../b1 adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets c35a0f9217e6 (run 'hg update' to get a working copy) $ hg up 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg log | grep summary summary: a $ cd .. Unknown compression type is rejected $ hg init t3 $ cd t3 $ hg -q unbundle ../b1 $ hg bundle -a -t unknown out.hg abort: unknown is not a recognized bundle specification (see 'hg help bundlespec' for supported values for --type) [255] $ hg bundle -a -t unknown-v2 out.hg abort: unknown compression is not supported (see 'hg help bundlespec' for supported values for --type) [255] $ cd .. test bundle types $ testbundle() { > echo % test bundle type $1 > hg init t$1 > cd t1 > hg bundle -t $1 ../b$1 ../t$1 > f -q -B6 -D ../b$1; echo > cd ../t$1 > hg debugbundle ../b$1 > hg debugbundle --spec ../b$1 > echo > cd .. > } $ for t in "None" "bzip2" "gzip" "none-v2" "v2" "v1" "gzip-v1"; do > testbundle $t > done % test bundle type None searching for changes 1 changesets found HG20\x00\x00 (esc) Stream params: {} changegroup -- {nbchanges: 1, version: 02} (mandatory: True) c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf cache:rev-branch-cache -- {} (mandatory: False) none-v2 % test bundle type bzip2 searching for changes 1 changesets found HG20\x00\x00 (esc) Stream params: {Compression: BZ} changegroup -- {nbchanges: 1, version: 02} (mandatory: True) c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf cache:rev-branch-cache -- {} (mandatory: False) bzip2-v2 % test bundle type gzip searching for changes 1 changesets found HG20\x00\x00 (esc) Stream params: {Compression: GZ} changegroup -- {nbchanges: 1, version: 02} (mandatory: True) c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf cache:rev-branch-cache -- {} (mandatory: False) gzip-v2 % test bundle type none-v2 searching for changes 1 changesets found HG20\x00\x00 (esc) Stream params: {} changegroup -- {nbchanges: 1, version: 02} (mandatory: True) c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf cache:rev-branch-cache -- {} (mandatory: False) none-v2 % test bundle type v2 searching for changes 1 changesets found HG20\x00\x00 (esc) Stream params: {Compression: BZ} changegroup -- {nbchanges: 1, version: 02} (mandatory: True) c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf cache:rev-branch-cache -- {} (mandatory: False) bzip2-v2 % test bundle type v1 searching for changes 1 changesets found HG10BZ c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf bzip2-v1 % test bundle type gzip-v1 searching for changes 1 changesets found HG10GZ c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf gzip-v1 Compression level can be adjusted for bundle2 bundles $ hg init test-complevel $ cd test-complevel $ cat > file0 << EOF > this is a file > with some text > and some more text > and other content > EOF $ cat > file1 << EOF > this is another file > with some other content > and repeated, repeated, repeated, repeated content > EOF $ hg -q commit -A -m initial $ hg bundle -a -t gzip-v2 gzip-v2.hg 1 changesets found $ f --size gzip-v2.hg gzip-v2.hg: size=468 $ hg --config experimental.bundlecomplevel=1 bundle -a -t gzip-v2 gzip-v2-level1.hg 1 changesets found $ f --size gzip-v2-level1.hg gzip-v2-level1.hg: size=475 $ hg --config experimental.bundlecomplevel.gzip=1 --config experimental.bundlelevel=9 bundle -a -t gzip-v2 gzip-v2-level1.hg 1 changesets found $ f --size gzip-v2-level1.hg gzip-v2-level1.hg: size=475 $ cd .. #if zstd $ for t in "zstd" "zstd-v2"; do > testbundle $t > done % test bundle type zstd searching for changes 1 changesets found HG20\x00\x00 (esc) Stream params: {Compression: ZS} changegroup -- {nbchanges: 1, version: 02} (mandatory: True) c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf cache:rev-branch-cache -- {} (mandatory: False) zstd-v2 % test bundle type zstd-v2 searching for changes 1 changesets found HG20\x00\x00 (esc) Stream params: {Compression: ZS} changegroup -- {nbchanges: 1, version: 02} (mandatory: True) c35a0f9217e65d1fdb90c936ffa7dbe679f83ddf cache:rev-branch-cache -- {} (mandatory: False) zstd-v2 Explicit request for zstd on non-generaldelta repos $ hg --config format.usegeneraldelta=false init nogd $ hg -q -R nogd pull t1 $ hg -R nogd bundle -a -t zstd nogd-zstd 1 changesets found zstd-v1 always fails $ hg -R tzstd bundle -a -t zstd-v1 zstd-v1 abort: compression engine zstd is not supported on v1 bundles (see 'hg help bundlespec' for supported values for --type) [255] #else zstd is a valid engine but isn't available $ hg -R t1 bundle -a -t zstd irrelevant.hg abort: compression engine zstd could not be loaded [255] #endif test garbage file $ echo garbage > bgarbage $ hg init tgarbage $ cd tgarbage $ hg pull ../bgarbage pulling from ../bgarbage abort: ../bgarbage: not a Mercurial bundle [255] $ cd .. test invalid bundle type $ cd t1 $ hg bundle -a -t garbage ../bgarbage abort: garbage is not a recognized bundle specification (see 'hg help bundlespec' for supported values for --type) [255] $ cd ..