1. A replacement for a python based command-not-found handler for openSUSE.
2. Written in Rust, so has as few runtime dependencies as is possible.
3. Uses libsolv under the hood, so is 100% compatible with zypper.

cargo build

To query not installed programs:

./target/debug/cnf cmake

The program 'cmake' can be found in following packages:
  * cmake-full [ path: /usr/bin/cmake, repository: repo-oss ]
  * cmake-mini [ path: /usr/bin/cmake, repository: repo-oss ]

Try installing with:
    sudo zypper install <selected_package>

To query installed programs in /usr/sbin:

./target/debug/cnf chcpu

Absolute path to 'chcpu' is '/usr/sbin/chcpu', so running it may require superuser privileges (eg. root).

To query installed programs in /usr/bin:

./target/debug/cnf vim

Absolute path to 'vim' is '/usr/bin/vim'. Please check your $PATH variable to see whether it contains the mentioned path

source command_not_found.bash # or command_not_found.zsh, or command_not_found.fish
export COMMAND_NOT_FOUND_BIN=./target/debug/cnf
cmake

The program 'cmake' can be found in following packages:
  * cmake-full [ path: /usr/bin/cmake, repository: repo-oss ]
  * cmake-mini [ path: /usr/bin/cmake, repository: repo-oss ]

Try installing with:
    sudo zypper install <selected_package>

Integration tests run inside docker images tagged local/cnf-ci-zypper, local/cnf-ci-dnf, and local/cnf-ci-dnf5; these are built as a part of a Github Action and can be built locally with:

for pm in zypper dnf dnf5; do
    docker build -t local/cnf-ci-$pm:latest -f test/$pm.dockerfile test
done

The testing itself is wrapped in bats and in order to make it run, one needs to initialize the git submodules (git submodule update --init). Then tests can be executed using following command

./test/bats/bin/bats ./test/

test.bats
 ✓ zypper root: installed /usr/bin/rpm
 ✓ zypper root: installed /usr/sbin/sysctl
 ✓ zypper root: not installed xnake
 ✓ zypper root: not installed make
 ✓ zypper root: not installed cmake
 ✓ zypper nonroot: not installed cmake
 ✓ zypper nonroot: bash without handler: not installed cmake
 ✓ zypper nonroot: bash handler: not installed cmake
 ✓ zypper nonroot: zsh without handler: not installed cmake
 ✓ zypper nonroot: zsh handler: not installed cmake
 ✓ zypper nonroot: fish handler: not installed cmake
 ✓ zypper issue26: do not list not installable files
 ✓ dnf root: installed /usr/bin/rpm
 ✓ dnf root: installed /usr/sbin/sysctl
 ✓ dnf root: not installed xnake
 ✓ dnf root: not installed make
 ✓ dnf root: not installed cmake
 ✓ dnf nonroot: not installed cmake
 ✓ dnf nonroot: bash without handler: not installed cmake
 ✓ dnf nonroot: bash handler: not installed cmake
 ✓ dnf nonroot: zsh without handler: not installed cmake
 ✓ dnf nonroot: zsh handler: not installed cmake
 ✓ dnf nonroot: fish handler: not installed cmake
 ✓ dnf issue26: do not list not installable files
 ✓ dnf5 root: installed /usr/bin/rpm
 ✓ dnf5 root: installed /usr/sbin/sysctl
 ✓ dnf5 root: not installed xnake
 ✓ dnf5 root: not installed make
 ✓ dnf5 root: not installed cmake
 ✓ dnf5 nonroot: not installed cmake
 ✓ dnf5 nonroot: bash without handler: not installed cmake
 ✓ dnf5 nonroot: bash handler: not installed cmake
 ✓ dnf5 nonroot: zsh without handler: not installed cmake
 ✓ dnf5 nonroot: zsh handler: not installed cmake
 ✓ dnf5 nonroot: fish handler: not installed cmake
 ✓ dnf5 issue26: do not list not installable files

36 tests, 0 failures

Every test can be executed on a command line. The `root.sh` wrapper mounts the
binary to `/usr/bin/cnf` and bash/fish integrations.

```.sh
./root.sh /usr/bin/cnf rpm

Absolute path to 'rpm' is '/usr/bin/rpm'. Please check your $PATH variable to see whether it contains the mentioned path

The step by step instructions for how to test the dnf part is

distrobox ephemeral
sudo zypper install dnf rpm-repos-openSUSE-Tumbleweed libcurl4
sudo dnf makecache
# run osc getbinaries utilities cnf openSUSE_Factory x86_64
sudo zypper in binaries/cnf-0.9*x86_64.rpm
cnf fractal

The program 'fractal' can be found in the following package:
  * fractal [ path: /usr/bin/fractal, repository: opensuse-tumbleweed-oss ]

Try installing with:
    sudo dnf install fractal

libcurl4 dependency is mandatory avoiding the No handler specified error from dnf/dnf5.

As cnf does not integrate with PowerShell by default, please read the issue comment #8 (comment) to learn how to configure your system properly:

Here's an example command_not_found.ps1 file that somewhat emulates what command_not_found.bash does:

#!/usr/bin/env -S pwsh

#Requires -PSEdition Core
#Requires -Version 7

$Env:TEXTDOMAINDIR = '/usr/share/locale'
$Env:TEXTDOMAIN = 'cnf'

$ExecutionContext.InvokeCommand.CommandNotFoundAction = {

    param($commandAsSubmitted, $commandLookupEventArgs)

    # Ignore the following invocations via:
    # *   A 'get-*' prefix stemming from PowerShell's default-verb logic;
    # *   A repeated lookup in the *current* dir. (./…) - PowerShell itself will provide feedback on that; and
    # *   Calls from scripts.
    if ($commandAsSubmitted -like 'Get-*' -or $commandAsSubmitted -like '.[/\]*' -or (Get-PSCallStack)[1].ScriptName) { return }

    # Determine the executable path.
    $cnf_bin = $env:COMMAND_NOT_FOUND_BIN ?? '/usr/bin/cnf'

    # Invoke and output the results directly to the terminal (host).
    & $cnf_bin $commandAsSubmitted *>&1 | Out-Host

    # Note:
    # *   PowerShell's not-found error is seemingly invariably printed afterwards; the following does *NOT* prevent that:
    #     ```.PS1
    #     $commandLookupEventArgs.StopSearch = $true
    #     ```
    # *   Supposedly, returning a `[System.Management.Automation.CommandInfo]` instance - such as output by `Get-Command` - can provide the command to execute, but that doesn't seem to work.

}

• This script can be invoked directly (doesn't need sourcing); e.g.. ./command_not_found.ps1
• A call to this script (or the code it contains) is best placed in the user's $PROFILE file.
• As in the Bash case, the mechanism supports only one custom command-not-found handler.
  • However, a plug-in system is being worked on that supports multiple third-party handlers, called feedback providers - see this blog post.
  • Someone could write a custom feedback provider that incorporates cnf, similar to the one in the command-not-found provider; the latter currently relies solely on the presence of /usr/lib/command-not-found, as preinstalled on Ubuntu distros.