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rust2rpm.toml - Man Page

package-specific configuration file for *rust2rpm*

Description

Many aspects of rust2rpm(1) can be configured by setting package-specific preferences in a rust2rpm.conf file. If a file with this name is present in the current working directory when running rust2rpm, it is loaded automatically. This is especially useful for changes that need to be permanently applied to generated spec files.

Options

The settings in rust2rpm.toml are split into different sections ("tables").

[package] table

This table contains settings that affect RPM metadata.

summary

This setting is used to override the value of the RPM "Summary" tag and can be used if the summary generated from crate metadata based on heuristics is not good enough. Accepts a TOML string.

description

This setting is used to override the value of the RPM %description. Accepts a TOML string (for longer / multi-line descriptions, triple-quoted multi-line strings can be used).

url

This setting allows specifying the homepage of the packaged project which is used as the value of the "URL" tag in the generated spec file. This setting is only valid for non-crate and workspace projects and can be used when the upstream project does not specify a homepage or repository URL in its metadata.

source-url

This setting allows specifying the download URL for the source code of the packaged project. It is used as the value of the "Source" tag in the generated spec file. This setting is only valid for non-crate and workspace projects and can be used for persisting the download URL which cannot be known in advance for non-crate and workspace projects.

supported-arches

This setting can be used to specify that the crate only has support for limited  architectures (i.e. not all CPU architectures that are supported by the distribution). This setting accepts TOML array of strings. If this setting is present, the "cargo build" and "cargo test" steps in the generated spec file are wrapped with "%ifarch" conditionals.

bin-package-name

This setting can be used to override the name of the subpackage that is generated if there are any "bin" (or "cdylib") targets. The default is to fall back to the name of the current crate ("%{crate}").

cargo-install-bin

This setting controls whether binary targets are installed by the %cargo_install macro. Setting "false" for this key causes "bin" targets not to be installed to %{_bindir} even if a "bin" target is auto-detected or the crate defines any "bin" target explicitly. The default value is "true".

cargo-install-lib

This setting controls whether library sources are installed by the %cargo_install macro. Setting "false" for this key causes crate sources not to be installed to %{crate_instdir} even if a library target is auto-detected or the crate defines a [lib] target explicitly. The default value is "true".

debuginfo-level

This setting allows setting the level of debuginfo that is generated by rustc. Valid choices are the numbers 0, 1, and 2, corresponding to the debuginfo levels that are supported by rustc. The default is 2. Setting a lower level can be a workaround for builds running out of available memory.

cargo-toml-patch-comments

This setting allows persisting comments that are associated with manually created patches for Cargo.toml (i.e. by running "rust2rpm -p"). The setting accepts a list of strings. Elements of the array are treated as individual comments, and individual comments are formatted and line-wrapped to 80 characters.

extra-sources

This setting can be used to specify additional Sources to be included in the generated spec file. The expected value for this key is an array of objects with three properties - "number", "file", and "comments". The integer "number" is used to set a predictable number of the Source file in the spec, the "file" is expected to be a string that contains an URL or a plain file name, and "comments" is an array of strings that are formatted in the same way as the "cargo-toml-patch-comments" setting.

extra-patches

This setting is similar to "extra-sources" but allows specifying additional Patch files instead of Source files.

extra-files

This setting allows injecting additional files into the "%files" section of the "binary" subpackage in the generated spec file (if it exists). The value is expected to be an array of strings, where each element of the array will end up on a separate line in the "%files" list. Specifying "extra-files" for a library-only Rust crate has no effect.

bin-renames

This nested table can be used to specify a re-mapping of executable names to avoid conflicts with other packages. To cause a rename of an existing "bin" target with name "foo" to a new name "bar", add a key-value pair like foo = "bar" to this table.

[scripts] table

This table contains settings which allow injecting additional commands into the "%prep", "%build", "%install", and "%check" scriptlets, both before and after the respective "%cargo_*" macro.

There is a corresponding nested table for each of these scriptlets ("prep", "build", "install", "check"), with two properties each ("pre" and "post") - both of which accept an array of strings as value. Each element of these arrays is injected as a separate line into the spec file.

[tests] table

This table contains settings that control which tests are run. If any settings that restrict which tests are run are present, the comments setting should also be added with an explanation of why the tests are disabled.

run

Specific (or all) tests can be turned off with this setting. It accepts a TOML array of strings (with only "none", "all", "lib", "bin", "doc", "bins", and "tests" being accepted values). Neither "none" or "all" can be used in combination with other settings, but other settings can be combined freely.
If this setting is not specified, the default is equivalent to "all" (i.e. all tests are run, no arguments are passed to "cargo test"). If the setting is set to "none", the "check" bcond is turned off. The other options specify that only some parts of the cargo test suite are run.

skip

This setting can be used to skip specific tests. They are passed as "--skip" arguments to the cargo test harness. Accepts a TOML array of strings.

skip-exact

This setting contols whether tests are skipped based on substring match (the default) or only on exact match. Unless there is a large number of skipped tests, it is recommended to enable this setting to avoid skipping too many / unrelated tests. Accepts a TOML boolean. If this setting is unspecified, the default behaviour is equivalent to setting it to "false".

comments

Whenever any tests (or kinds of tests) are skipped or disabled, it is strongly recomemended to add short comments (or links to upstream issues) that explain why that is the case. Accepts a TOML array of strings. The comment text is automatically formatted, line-wrapped to 80 columns, and prefixed with "#". If run is set to ["none"], the comments are added just before the disabled "check" bcond. Otherwise, the comments are added just before the "%cargo_test" macro calls.

[features] table

The [features] table wraps settings that pertain to crate "features" and feature flags that are passed to cargo.

enable-all

When enabled, this setting causes the "-a" / "--all-features" flag to be passed to all cargo calls. This can be used for crates where running tests requires optional features to be enabled, or for applications where enabling all features is desirable. Accepts a TOML boolean. Setting enable-all to "true" requires the enable setting to be unspecified or to be an empty array. The default behaviour if this setting is not specified is equivalent to setting it to "false".

enable

This setting provides more fine-grained control for passing feature flags to cargo calls. Accepts a TOML array of strings that must be valid feature names. Setting enable to a non-empty array requires the enable-all setting to be unspecified or to be "false".

disable-default

When enabled, this setting causes the "-n" / "--no-default-features" flag to be passed to all cargo calls. This should only be used in circumstances where applications need to be built with non-default features (for example, switching from the default crypto backend to OpenSSL). This setting MUST NOT be enabled when building library crates, since the resulting packages might build, but the built packages will likely fail to install.

hide

This setting can be used to prevent subpackages for crate features and implicit features for optional dependencies from being generated in the spec file. For example, this can be useful for crates that have unused non-default features which pull in additional dependencies. Accepts a TOML array of strings that must be valid feature names / names of optional dependencies with associated implicit features.
NOTE: Care needs to be taken to only "hide" features / optional dependencies that are not dependencies of other "non-hidden" features, otherwise the subpackages for the dependent features will have unsatisfiable dependencies. All features that are marked as "hidden" by this setting must be "unreachable" via feature dependencies from any feature subpackages that are still present in the generated spec file. In some circumstances, the only way to cleanly handle removal of unused non-default features is to patch Cargo.toml instead.

[requires] table

Additional RPM dependencies (Requires) for different types of subpackages can be specified with settings in the [requires] table.

build

Additional BuildRequires for the package can be specified with this setting. Accepts a TOML array of strings that must be valid RPM dependency identifiers. The BuildRequires included in this setting are either added in the %generare_buildrequires scriptlet for targets where this is enabled, or as plain BuildRequires for targets without dynamically generated BuildRequires.

test

This setting allows specifying additional BuildRequires that are only needed when running a project’s test suite (i.e. "cargo test"). It works the same as the setting for additional BuildRequires, except that all entries are wrapped in an "%if %{with check}" conditional.

lib

With this setting, additional dependencies (Requires) for the main "-devel" subpackage of a "library crate" can be specified. For example, many "-sys" bindings require the development headers for the wrapped C library to be present during both build time of the package for the crate itself and when building a package that depends on this crate. In these cases, the same dependency often needs to be added in both requires.build and requires.lib. Accepts a TOML array of strings that must be valid RPM dependency identifiers.

bin

For crates that include application binaries / executables, this setting can be used to add additional dependencies for the subpackage that contains these executables. Accepts a TOML array of strings that must be valid RPM dependency identifiers.

features

This nested table can be used to specify additional dependencies for "feature subpackages". The keys in this table must be valid names of crate features or names of optional dependencies with associated implicit features, and values are expected to be TOML arrays of strings that must be valid RPM dependency identifiers.

Migrating from rust2rpm.conf

The manual page for rust2rpm.conf(5) contains simple guide for migrating old configuration files to TOML.

Examples

Bindings for system libraries

One typical use case for a rust2rpm.toml file are in packages for crates that contain bindings for system libraries, especially if crate features are used to control which APIs of the library are made available.

Example file equivalent to the rust2rpm.conf example for "gtk4-sys" version 0.7.3 on Fedora 38, where version 4.10 of gtk4 is available:

[features]
hide = ["v4_12", "v4_14"]

[requires]
build = ["pkgconfig(gtk4) >= 4.0.0"]
lib = ["pkgconfig(gtk4) >= 4.0.0"]

[requires.features]
v4_2 = ["pkgconfig(gtk4) >= 4.2"]
v4_4 = ["pkgconfig(gtk4) >= 4.4"]
v4_6 = ["pkgconfig(gtk4) >= 4.6"]
v4_8 = ["pkgconfig(gtk4) >= 4.7"]
v4_10 = ["pkgconfig(gtk4) >= 4.10"]

External dependencies of the Rust standard library

The Rust standard library depends on some crates that are also published separately, and a "hack" is used when building these crates as part of "std". The crate features and optional dependencies that are used for this purpose are useless in other situations.

Example file from the package for "libc" version 0.2.149:

[features]
hide = [
    "rustc-dep-of-std",
    "rustc-std-workspace-core",
]

[requires]
build = ["glibc-devel"]
lib = ["glibc-devel"]

Homepage

https://pagure.io/fedora-rust/rust2rpm

See Also

rust2rpm(1), rust2rpm.conf(5)

Referenced By

rust2rpm(1), rust2rpm.conf(5).

2024-06-08 rust2rpm