Source: rust-base64
Version: 0.21.7-1
Severity: wishlist
X-Debbugs-Cc: Daniel Kahn Gillmor <d...@fifthhorseman.net>

rust-base64 has a new upstream version 0.22.0 available, with the
following subtle changes to the API since 0.21.7:


- `DecodeSliceError::OutputSliceTooSmall` is now conservative rather
   than precise. That is, the error will only occur if the decoded
   output _cannot_ fit, meaning that `Engine::decode_slice` can now be
   used with exactly-sized output slices. As part of this,
   `Engine::internal_decode` now returns `DecodeSliceError` instead of
   `DecodeError`, but that is not expected to affect any external
   callers.

- `DecodeError::InvalidLength` now refers specifically to the _number of
  valid symbols_ being invalid (i.e. `len % 4 == 1`), rather than just
  the number of input bytes. This avoids confusing scenarios when based
  on interpretation you could make a case for either `InvalidLength` or
  `InvalidByte` being appropriate.


In debian, we have a bunch of different packages that depend on 0.21:

Versions of rdeps of rust-base64 in unstable, that also exist in testing:
  librust-alacritty-terminal-dev                   0.19.1-7         depends on  
   librust-base64-0.21+default-dev, 
  librust-bson-dev                                 2.10.0-1         depends on  
   librust-base64-0.21+default-dev, 
  librust-cargo-dev                                0.70.1-2         depends on  
   librust-base64-0.21+default-dev, 
  librust-charset-dev                              0.1.3-1+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-cookie-dev                               0.18.0-1         depends on  
   librust-base64-0.21+default-dev (>= 0.21.4-~~), 
  librust-embed-doc-image-dev                      0.1.4-1+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-fernet-dev                               0.2.0+really0.1.4-3 depends 
on     librust-base64-0.21+default-dev, 
  librust-gix-transport-dev                        0.42.0-1         depends on  
   librust-base64-0.21+default-dev, 
  librust-headers-dev                              0.3.9-1+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-http-auth-dev                            0.1.8-1+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-jsonwebtoken-dev                         8.3.0-4          depends on  
   librust-base64-0.21+default-dev, 
  librust-oauth2-dev                               4.4.1-2          depends on  
   librust-base64-0.21+default-dev, 
  librust-openssh-keys-dev                         0.6.2-1+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-parsec-service-dev                       1.3.0-5+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-parsec-tool-dev                          0.7.0-4          depends on  
   librust-base64-0.21+default-dev, 
  librust-pem-dev                                  3.0.3-2          depends on  
   librust-base64-0.21+alloc-dev, librust-base64-0.21+std-dev, 
  librust-picky-asn1-x509-dev                      0.10.0-1+b1      depends on  
   librust-base64-0.21+default-dev, 
  librust-plist-dev                                1.6.1-1          depends on  
   librust-base64-0.21+default-dev, 
  librust-postgres-protocol-dev                    0.6.6-2          depends on  
   librust-base64-0.21+default-dev, 
  librust-reqwest-dev                              0.11.24-3        depends on  
   librust-base64-0.21+default-dev, 
  librust-rfc2047-decoder-dev                      0.2.2-1+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-ripasso-dev                              0.6.5-2          depends on  
   librust-base64-0.21+default-dev (>= 0.21.2-~~), 
  librust-ron-dev                                  0.7.1-3          depends on  
   librust-base64-0.21+default-dev, 
  librust-ruma-common-dev                          0.10.5-4         depends on  
   librust-base64-0.21+default-dev, 
  librust-rust-argon2-dev                          1.0.0-3          depends on  
   librust-base64-0.21+default-dev, 
  librust-rustls-pemfile-dev                       1.0.3-1          depends on  
   librust-base64-0.21+default-dev, 
  librust-sequoia-autocrypt-dev                    0.25.1-1         depends on  
   librust-base64-0.21+default-dev, 
  librust-sequoia-net-dev                          0.28.0-1         depends on  
   librust-base64-0.21+default-dev, 
  librust-sequoia-openpgp-dev                      1.19.0-1         depends on  
   librust-base64-0.21+default-dev, 
  librust-serde-with-dev                           3.4.0-2          depends on  
   librust-base64-0.21+alloc-dev, librust-base64-0.21-dev, 
  librust-sqlx-postgres-dev                        0.7.3-1          depends on  
   librust-base64-0.21+std-dev, 
  librust-sshkeys-dev                              0.3.2-1+b1       depends on  
   librust-base64-0.21+default-dev, 
  librust-totp-rs-dev                              3.0.1-3          depends on  
   librust-base64-0.21+default-dev, 
  librust-tower-http-dev                           0.4.4-3          depends on  
   librust-base64-0.21+default-dev, 
  librust-ureq-dev                                 2.9.1-3          depends on  
   librust-base64-0.21+default-dev, 
  librust-wycheproof-dev                           0.5.0-1+b1       depends on  
   librust-base64-0.21+default-dev, 

Source packages in unstable whose autopkgtests are triggered by rust-base64:
  rust-native-tls                                  0.2.11-2         triggered 
by     librust-base64-dev=0.21.7-1
  rust-octocrab                                    0.31.2-1         triggered 
by     librust-base64-dev=0.21.7-1
  rust-picky-asn1-der                              0.4.0-1          triggered 
by     librust-base64-dev=0.21.7-1
  rust-psa-crypto                                  0.9.2-3          triggered 
by     librust-base64-dev=0.21.7-1
  rust-rustls                                      0.21.10-1        triggered 
by     librust-base64-dev=0.21.7-1
  rust-rustls-webpki                               0.101.7-2.1      triggered 
by     librust-base64-dev=0.21.7-1
  rust-ttf-parser                                  0.19.1-2         triggered 
by     librust-base64-dev=0.21.7-1
  rust-webpki                                      0.22.4-2         triggered 
by     librust-base64-dev=0.21.7-1
  rust-wu-diff                                     0.1.2-1          triggered 
by     librust-base64-dev=0.21.7-1



some of them, like rust-sequoia 1.20.0, have been tested successfully by
upstream against 0.22.0, but upgrading directly to 0.22.0 could break
the build of all of these packages.

So, either we need to:

- do a mass-testing event, patching the Cargo.toml of each of these
  reverse dependencies; if all the relevant tests succeed, then commit
  all these changes at once and push them into unstable as a batch.

or:

- upload a versioned rust-base64-0.21 that is capable of satisfying the
  existing reverse dependencies, and then upload 0.22 as the standad
  rust-base64.  Then we can at our leisure fix each reverse dependency
  (hopefully pushing fixes into the upstream projects)

The latter approach sounds more more plausible to me in terms of getting
the ball moving sooner (mass testing is expensive to set up), though it
could last a longer time than the former approach if a few packages
linger.  but maybe other rust packagers have other preferred workflows
to tackle this kind of transition.

In the meantime, i intend to upload a version of rust-sequoia-openpgp
with a patched dependency that just depends on the older 0.21.7 version.

   --dkg



-- System Information:
Debian Release: trixie/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing'), (500, 'stable'), (500, 
'oldstable'), (200, 'unstable-debug'), (200, 'unstable'), (1, 
'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.6.15-amd64 (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_FIRMWARE_WORKAROUND
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

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