Duplicative auto completions

[AurevoirXavier]

Problem

Duplicative auto completions

Steps

rustup completions zsh rustup > ~/.cache/oh-my-zsh/completions/_rustup

rustup c <TAB>

check        -- Check for updates to Rust toolchains and rustup
completions  -- Generate tab-completion scripts for your shell
component    -- Modify a toolchain's installed components
# It also starts the path completion, weird
code/

rustup check <TAB>

# All these are duplicative
check           -- Check for updates to Rust toolchains and rustup
completions     -- Generate tab-completion scripts for your shell
component       -- Modify a toolchain's installed components
default         -- Set the default toolchain
doc             -- Open the documentation for the current toolchain
dump-testament  -- Dump information about the build
help            -- Prints this message or the help of the given subcommand(s)
install         -- Update Rust toolchains
man             -- View the man page for a given command
override        -- Modify directory toolchain overrides
run             -- Run a command with an environment configured for a given toolchain
self            -- Modify the rustup installation
set             -- Alter rustup settings
show            -- Show the active and installed toolchains or profiles
target          -- Modify a toolchain's supported targets
toolchain       -- Modify or query the installed toolchains
uninstall       -- Uninstall Rust toolchains
update          -- Update Rust toolchains and rustup
which           -- Display which binary will be run for a given command

rustup check check --v

--help     -h  -- Prints help information
--version  -V  -- Prints version information

rustup check check --version

error: Found argument 'check' which wasn't expected, or isn't valid in this context

USAGE:
    rustup check

For more information try --help

Possible Solution(s)

No response

Notes

No response

Rustup version

rustup 1.25.1 (bb60b1e89 2022-07-12)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.68.0-nightly (0b90256ad 2023-01-13)`

Installed toolchains

Default host: aarch64-apple-darwin
rustup home:  /Users/xavier/.rustup

installed toolchains
--------------------

stable-aarch64-apple-darwin
nightly-aarch64-apple-darwin (default)

installed targets for active toolchain
--------------------------------------

aarch64-apple-darwin
wasm32-unknown-unknown

active toolchain
----------------

nightly-aarch64-apple-darwin (default)
rustc 1.68.0-nightly (0b90256ad 2023-01-13)

[rbtcollins]

This is probably some clap interaction.

[samchouse]

This is also an issue for me but it doesn't occur with Cargo completions. Something specifically about Rustup completions must have gone wrong.

[djc]

@Xenfo do you want to test if this still happens with #3444?

[omertuc]

EDIT: see more minimal Containerfile below

Still happens, can easily reproduce with the following:

cd $(mktemp -d)

cat << EOF > Containerfile
FROM alpine
RUN apk add --no-cache zsh curl
RUN zsh -c "curl https://sh.rustup.rs -sSf | sh -s -- -y"
RUN mkdir ~/.zfunc
RUN ~/.cargo/bin/rustup completions zsh > ~/.zfunc/_rustup
RUN echo 'export PATH="/root/.cargo/bin/:\$PATH"' > ~/.zshrc
RUN echo 'fpath+=~/.zfunc' >> ~/.zshrc
RUN echo 'autoload -Uz compinit' >> ~/.zshrc
RUN echo 'compinit' >> ~/.zshrc
ENTRYPOINT /bin/zsh
EOF

podman build . --iidfile rustupid
podman run -it $(cat rustupid)

[rami3l]

Our command line argument parser has been rewritten in #3596, so we might need to test against the latest (git) version to know whether the issue is still there.

@omertuc Thanks in advance for your reproduction steps :)

[rami3l]

@omertuc I can reproduce this on d288805 with the following Dockerfile:

FROM rust:alpine
RUN apk add --no-cache zsh curl
ADD _rustup /root/.zfunc/
RUN echo 'export PATH="/root/.cargo/bin/:$PATH"' > ~/.zshrc
RUN echo 'fpath+=~/.zfunc' >> ~/.zshrc
RUN echo 'autoload -Uz compinit' >> ~/.zshrc
RUN echo 'compinit' >> ~/.zshrc
ENTRYPOINT /bin/zsh

@samchouse Thanks for your insight. This seems to have something to do with the +toolchain syntax. Clap does not know the difference between rustup +completions completions and rustup completions completions (the rejection logic is implemented manually), so it will happily suggest the latter.

[rami3l]

Unfortunately, given the analysis above in #3156 (comment), I'm afraid there's not much we can do about this situation.

[omertuc]

Would something like this help in the future?

[rami3l]

Would something like this help in the future?

@omertuc Looks like it requires a lot of changes to the current shell ecosystem, but it'll definitely be helpful if feasible.