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0000000..0ad25db --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..cde87b6 --- /dev/null +++ b/README.md @@ -0,0 +1,149 @@ +# ia + +while several existing package managers implement one, or some, of these attributes, none of them: +* avoid doing weird things to archive files for file formats; +* avoid introducing a second-tier meta-language such as "macros"; +* ensure that packages are built reproducibly by default, only providing an escape hatch for impossible cases; +* ensure that package composition is constructed in a clean, restricted namespace; +* optionally create an immutable overlay using reflinks into the running system to provide an immutable base; +* exclusively utilise a capability-based operating model for the packaging pipeline to mitigate malicious build manifests; +* provide easily-indexable information on package contents for end-users; +* provide atomicity of *individual* package installation and uninstallation; **and** +* use a declarative composition pipeline and configuration using a simple, halting configuration language. + +many wrappers for current package managers exist that attempt to create declarative behaviour or implement some of these traits, and in some cases processes or external tools are used by maintainers to perform the above. many of these tools simply spawn these underlying tools as subprocesses, cleaning up as best they can, and operating on a trust model with the underlying imperative package manager. + +`ia` is an attempt at a fully declarative package manager as thoroughly as usably viable while attempting to learn from experiences packaging for (and using) various distributions throughout the years. + +fundamentally, `ia` functions similar to the build process in almost any other package manager, utilising the [apk file format](https://wiki.alpinelinux.org/wiki/Apk_spec) for artifact outputs. optionally, `ia` can generate an ostree overlay containing the package composition pipeline's outputs. this can be overlayed onto the root filesystem to provide read-only access to the package's files. + +## current status + +`ia` usage is currently represented by its [test suite](crates/ia/src/tests). + +## install + +* `ia-cli` binary: `cargo build --bin ia-cli` + * this is the `ia` executable which provides the client and server modules. +* `ia` library: `cargo build --lib ia` + * this is a rust library that can be used by others. + +## configuration + +* `ia` configuration file manpage: `man 5 ia.toml` +* [example configuration file](./crates/tests/fixtures/package/manifest.toml) + +## usage + +* `ia` help: `ia --help` +* `ia` cli manpage: `man 8 ia` +* `ia` [library development docs](https://docs.rs/git.mischief.expert/arcayr/ia) + +## packaging for ia + +* `ia build` help: `ia build --help` +* `ia build` manpage: `man 8 ia-build` +* [example manifest](./crates/tests/fixtures/package/manifest.toml) +* `ia` [package manifest source](./crates/ia/src/manifest) + +## repository hosting for ia + +* `ia server` help: `ia server --help` +* `ia server` manpage: `man 8 ia-server` + +## why the name? + +short, it doesn't mean anything. it was called `pk` before this, which meant 'package keeper'. this was obviously even less unimaginative and very taken. + +if you really need a longer name to attach to it, i guess 'installation assistant' works just fine. + +## something's wrong + +🚧 + +## this is bad / this makes me angry / i don't like this + +🙂 + +## what's the todo? + +`ia` is considered pre-pre alpha. + +### pre-alpha +- **package building pipeline unsandboxed** +- ~~full manifest parsing~~ +- ~~source file hash verification~~ +- ~~implementation of fetchers for local files~~ +- basic cli + - most commands will be behind "unsafe" flags, as their behaviour will be kept to bypass + cases where the standard method simply cannot work +- package building pipeline via `exec` escape hatch + +### alpha +- **package building pipeline sandboxed** + build pipeline utilises `cap_std`, ia will utilise the repository server to obtain build dependencies +- implementation of fetchers for `http`/`https`, `git`, and `ftp`. +- `build_dependencies` support +- package lockfile generation +- cli configuration file +- repository server +- package definition import from: + - apk: apkbuild +- implementation of specific configuration / pre-build handlers + - autoconf +- implementation of specific build handlers + - cmake + - go + - meson + - cpan + - python: setup.py +- implementation of specific test handlers + - cmake + - go + - cargo + - meson + +### beta +- ostree overlays from ia transactions +- implementation of further download handlers + - hg + - bzr +- implementation of further build handlers + - cargo + - python (distutils) +- package definition import from: + - apk: apkbuild + - pacman: pkgbuild + - rpm: specfile +- `exec` escape hatch moved to require unsafe flag +- 100% test coverage + - some tests will need to be executed separately due to their interaction + with state outside of the library (e.g., source fetching). + +### 1.0+ +* package definition import from: + * deb: debian control + * library package definition import from: + * javascript: npm + * ruby: rubygems (via git) + * python: pypi + * rust: crates.io + * go: pkg.dev +* packagekit integration + +## references and inspirations + +* [apk](https://wiki.alpinelinux.org/wiki/Alpine_Package_Keeper) +* [the apk file specification](https://wiki.alpinelinux.org/wiki/Apk_spec) +* [ostree](https://ostreedev.github.io/) +* [rpm-ostree](https://coreos.github.io/rpm-ostree) +* [overlayfs](https://www.kernel.org/doc/Documentation/filesystems/overlayfs.txt) +* [composefs](https://github.com/containers/composefs) +* [bootc](https://containers.github.io/bootc) +* [nix](https://nixos.org/) + +## license + +`ia` is released under the AGPLv3 license, the text of which you can find [in the LICENSE file](./LICENSE). + +`ia` will not be dual licensed, and is provided as-is without warranty. diff --git a/crates/ia/Cargo.toml b/crates/ia/Cargo.toml new file mode 100644 index 0000000..df662f8 --- /dev/null +++ b/crates/ia/Cargo.toml @@ -0,0 +1,16 @@ +[package] +name = "ia" +version = "0.0.0" +edition = "2021" + +[dependencies] +base16ct = { version = "0.2.0", features = ["alloc", "std"] } +cap-std = "3.3.0" +cap-tempfile = "3.3.0" +digest = { version = "0.10.7", features = ["alloc", "std"] } +serde = { version = "1.0.210", features = ["derive"] } +sha2 = "0.10.8" +sha3 = "0.10.8" +strum = { version = "0.26.3", features = ["derive"] } +thiserror = "1.0.64" +toml = "0.8.19" diff --git a/crates/ia/fixtures/package/manifest.toml b/crates/ia/fixtures/package/manifest.toml new file mode 100644 index 0000000..16881ee --- /dev/null +++ b/crates/ia/fixtures/package/manifest.toml @@ -0,0 +1,28 @@ +name = "test-package" +description = "test package" +version = "1.2.3-git" +revision = 42 +license = "gpl-3.0-only" +architectures = [ "ppc64" ] +dependencies = [ ] +build_dependencies = [ ] +provides = [ "hello-world" ] +groups = [ "examples" ] + +[[sources]] +name = "test-source.txt" +url = "file:./source-test.txt" +hash = "sha2:4cbf04bd094e2bd2eda36cf3561bfa61cb1a83c29427f0dd01d8b071cd8d002f3f46aa1c8b5eef25e7743f629ad4976f59bf7ee07d345b9bdb89c85703e581c7" + +[configure] +exec = """ +""" + +[build] +exec = """ +make +""" + +[test] +exec = """ +""" diff --git a/crates/ia/fixtures/package/test-source.txt b/crates/ia/fixtures/package/test-source.txt new file mode 100644 index 0000000..9daeafb --- /dev/null +++ b/crates/ia/fixtures/package/test-source.txt @@ -0,0 +1 @@ +test diff --git a/crates/ia/src/error.rs b/crates/ia/src/error.rs new file mode 100644 index 0000000..7fb16cf --- /dev/null +++ b/crates/ia/src/error.rs @@ -0,0 +1,59 @@ +//! error types used within ia + +use thiserror::Error; + +#[derive(Debug, thiserror::Error)] +pub enum Error { + Manifest(ErrorSource), + Hash(ErrorSource), +} + +#[derive(Debug, thiserror::Error)] +pub enum Hash { + #[error("invalid hash algorithm: {0}")] + InvalidAlgorithm(String), + #[error("invalid hash string: {0}")] + InvalidHashString(String), +} + +#[derive(Debug, thiserror::Error)] +pub enum Source { + #[error("bad source url: {0}")] + BadUrl(String), + #[error("hash error: {0}")] + Hash(Hash), + #[error("no fetcher attached to source: {0}")] + NoFetcher(String), + #[error("fetcher error: {0}")] + Fetcher(Fetcher), +} + +#[derive(Debug, thiserror::Error)] +pub enum Manifest { + #[error("parse error")] + Parse, + #[error("filesystem error: {0}")] + FS(FS), +} + +#[derive(Debug, thiserror::Error)] +pub enum FS { + #[error("could not create file")] + Create, + #[error("could not read file")] + Read, + #[error("could not write file")] + Write, + #[error("could not create directory")] + CreateDir, + #[error("could not read file: {0}")] + ReadNamed(String), + #[error("could not read file: {0}")] + WriteNamed(String), +} + +#[derive(Debug, Error)] +pub enum Fetcher { + #[error("filesystem error: {0}")] + FS(FS), +} diff --git a/crates/ia/src/fs.rs b/crates/ia/src/fs.rs new file mode 100644 index 0000000..466881f --- /dev/null +++ b/crates/ia/src/fs.rs @@ -0,0 +1,177 @@ +//! abstractions over the filesystem, predominantly over the capability-based +//! filesystem offered by [cap_std]. +use std::{ + io::{BufReader, BufWriter, Read, Seek, Write}, + path::{Path, PathBuf}, +}; + +use crate::error; +use cap_std::fs; +use cap_tempfile; + +pub enum Permissions { + Read, + Write, + WriteCreate, + ReadWrite, +} + +impl From for fs::OpenOptions { + fn from(value: Permissions) -> Self { + match value { + Permissions::Read => fs::OpenOptions::new().read(true).to_owned(), + Permissions::Write => fs::OpenOptions::new().write(true).to_owned(), + Permissions::WriteCreate => fs::OpenOptions::new() + .read(true) + .write(true) + .create(true) + .to_owned(), + Permissions::ReadWrite => fs::OpenOptions::new().read(true).write(true).to_owned(), + } + } +} + +/// a representation of an entry in a directory on the filesystem. +#[allow(dead_code)] +pub struct DirEntry(fs::DirEntry); + +impl DirEntry {} + +/// a representation of an open directory on the filesystem. +pub struct Dir(fs::Dir); + +impl Dir { + /// constructs a new Dir by opening `path` as a directory + /// using the process's ambient authority. + pub fn open_ambient(path: PathBuf) -> Result { + fs::Dir::open_ambient_dir(&path, cap_std::ambient_authority()) + .map(Dir) + .map_err(|_| error::FS::ReadNamed(path.to_string_lossy().to_string())) + } + + /// attempts to return a list of entries within the directory. + /// any entries that cannot be properly parsed into a path are ignored. + pub fn entries(&self) -> Result, error::FS> { + Ok(self + .0 + .entries() + .map_err(|_| error::FS::Read)? + .filter_map(|de| de.ok()) + .map(DirEntry) + .collect()) + } + + /// attempts to open a file by name in the directory, with the provided [Permissions]. + pub fn open_file>( + &self, + path: P, + permissions: Permissions, + ) -> Result { + self.0 + .open_with(&path, &permissions.into()) + .map(File) + .map_err(|_| error::FS::ReadNamed(path.as_ref().to_string_lossy().to_string())) + } +} + +#[derive(Debug)] +/// a representation of an open file on the filesystem. +pub struct File(fs::File); + +impl File { + /// constructs a new [File] by opening the `path` as a file + /// using the process's ambient authority. + /// this method should be used sparingly, and never directly + /// take user input. + pub fn open_ambient(path: &PathBuf) -> Result { + fs::File::open_ambient(path, cap_std::ambient_authority()) + .map(File) + .map_err(|_| error::FS::ReadNamed(path.to_string_lossy().to_string())) + } + + pub fn read(&mut self, dst_bytes: &mut [u8]) -> Result { + self.0.read(dst_bytes).map_err(|_| error::FS::Read) + } + + /// writes a slice of bytes to the beginning of a file. + pub fn write(&mut self, bytes: &[u8]) -> Result { + self.0 + .seek(std::io::SeekFrom::Start(0)) + .map_err(|_| error::FS::Read)?; + + self.0.write(bytes).map_err(|_| error::FS::Write) + } + + /// converts self into a [BufReader]. + pub fn into_reader(self) -> Result, error::FS> { + Ok(BufReader::new(self)) + } + + /// converts self into a [BufWriter]. + pub fn into_writer(self) -> Result, error::FS> { + Ok(BufWriter::new(self)) + } + + /// copies the contents of self into `dst`. + pub fn copy_to(&mut self, dst: &mut dyn std::io::Write) -> Result { + std::io::copy(self, dst) + .map_err(|_| error::FS::Write) + .and_then(|i| { + dst.flush() + .map(|_| i as usize) + .map_err(|_| error::FS::Write) + }) + } +} + +impl Read for File { + fn read(&mut self, buf: &mut [u8]) -> std::io::Result { + self.0.read(buf) + } +} + +impl Write for File { + fn write(&mut self, buf: &[u8]) -> std::io::Result { + self.0.write(buf) + } + + fn flush(&mut self) -> std::io::Result<()> { + self.0.flush() + } +} + +/// a representation of an open temporary directory on the filesystem. +/// this directory will be deleted from the filesystem when it goes out of +/// scope. +pub struct TempDir(cap_tempfile::TempDir); + +impl TempDir { + /// constructs a new [TempDir] using the ambient authority. + pub fn new() -> Result { + cap_tempfile::TempDir::new(cap_std::ambient_authority()) + .map(TempDir) + .map_err(|_| error::FS::CreateDir) + } + + /// constructs a new [TempDir] within the provided [Dir]. + pub fn new_in(dir: &Dir) -> Result { + cap_tempfile::TempDir::new_in(&dir.0) + .map(TempDir) + .map_err(|_| error::FS::CreateDir) + } + + pub fn open_file>( + &self, + path: P, + permissions: Permissions, + ) -> Result { + self.0 + .open_with(&path, &permissions.into()) + .map(File) + .map_err(|_| error::FS::ReadNamed(path.as_ref().to_string_lossy().to_string())) + } + + pub fn into_dir(self) -> Result { + self.0.into_dir().map(Dir).map_err(|_| error::FS::Read) + } +} diff --git a/crates/ia/src/hashstring.rs b/crates/ia/src/hashstring.rs new file mode 100644 index 0000000..ef60df1 --- /dev/null +++ b/crates/ia/src/hashstring.rs @@ -0,0 +1,135 @@ +//! creation and manipulation of ia hashstrings. +use crate::error; +use digest::DynDigest; +use serde::{de::Visitor, Deserialize, Deserializer, Serialize, Serializer}; +use std::{fmt::Display, io::Write, str::FromStr}; + +/// a hash algorithm supported by ia. +#[derive( + strum::Display, strum::EnumString, Clone, Debug, Deserialize, Serialize, PartialEq, Eq, +)] +pub enum HashAlgorithm { + #[strum(to_string = "sha2", ascii_case_insensitive)] + Sha2, + #[strum(to_string = "sha3", ascii_case_insensitive)] + Sha3, +} + +/// a collection of bytes representing the generated hash. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct HashValue(Box<[u8]>); + +impl HashValue { + pub fn new>(val: T) -> Self { + Self(val.as_ref().to_owned().into_boxed_slice()) + } +} + +impl Display for HashValue { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match String::from_utf8(self.0.to_vec()) { + Ok(s) => write!(f, "{}", s), + Err(_) => write!(f, "{}", base16ct::lower::encode_string(&self.0)), + } + } +} + +/// an individual hashstring for a package, input, or output. +/// hashstrings are expressed as a string in the format `alg:hash`. +/// hashes of package inputs are used to verify their authenticity. +/// hashes of the package outputs allow the content-addressed storage model to work. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct Hashstring { + pub algorithm: HashAlgorithm, + pub value: HashValue, +} + +impl Display for Hashstring { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "{}:{}", self.algorithm, self.value) + } +} + +pub trait Hasher: DynDigest + Write {} + +impl Hasher for sha2::Sha512 {} + +impl Hasher for sha3::Sha3_512 {} + +impl Hashstring { + pub fn hasher_for(alg: &HashAlgorithm) -> Result, error::Hash> { + match alg { + HashAlgorithm::Sha2 => Ok(Box::new(sha2::Sha512::default())), + HashAlgorithm::Sha3 => Ok(Box::new(sha3::Sha3_512::default())), + } + } + + // creates a new hash with the provided algorithm and value. + pub fn new(alg: HashAlgorithm, val: String) -> Result { + Ok(Self { + algorithm: alg, + value: HashValue::new(val.as_bytes()), + }) + } +} + +impl FromStr for Hashstring { + type Err = error::Hash; + + fn from_str(s: &str) -> Result { + s.to_lowercase() + .split_once(':') + .ok_or(error::Hash::InvalidHashString(s.to_owned())) + .map(|(alg, val)| { + HashAlgorithm::from_str(alg) + .map_err(|_| error::Hash::InvalidAlgorithm(alg.to_owned())) + .map(|alg| (alg, val)) + })? + .map(|(alg, val)| Hashstring::new(alg, val.to_owned()))? + } +} + +struct HashVisitor; + +impl<'de> Visitor<'de> for HashVisitor { + type Value = Hashstring; + + fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result { + formatter.write_str("a hash string (`algorithm:value`)") + } + + fn visit_str(self, v: &str) -> Result + where + E: serde::de::Error, + { + Hashstring::from_str(v).map_err(|_| E::invalid_type(serde::de::Unexpected::Str(v), &self)) + } + + fn visit_string(self, v: String) -> Result + where + E: serde::de::Error, + { + // all hashes are represented in lowercase. + // this generally handles unicode, but + // hashes currently used by ia use ascii only. + self.visit_str(&v.to_lowercase()) + } +} + +impl<'de> Deserialize<'de> for Hashstring { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + deserializer.deserialize_string(HashVisitor) + } +} + +impl Serialize for Hashstring { + fn serialize(&self, serializer: S) -> Result + where + S: Serializer, + { + serializer.serialize_str(self.to_string().as_str()) + } +} diff --git a/crates/ia/src/lib.rs b/crates/ia/src/lib.rs new file mode 100644 index 0000000..e973032 --- /dev/null +++ b/crates/ia/src/lib.rs @@ -0,0 +1,92 @@ +use std::{fmt::Display, str::FromStr}; + +use serde::{Deserialize, Serialize}; + +#[cfg(test)] +mod tests; + +pub mod error; +pub mod fs; + +mod license; +pub use license::License; + +pub mod version; +pub use version::Version; + +pub mod manifest; +pub use manifest::Manifest; + +pub mod source; +pub use source::Source; + +pub mod hashstring; +pub use hashstring::Hashstring; + +/// a package name, usually verbatim from upstream. +#[derive(Debug, Deserialize, Serialize)] +pub struct Name(String); + +impl Display for Name { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!( + f, + "{}", + // this isn't a safety net but to make sure nobody does stupid + // things with package names. + // if someone intentionally shoots themself in the foot by + // circumventing these replacements they will only injure their own + // filesystem. + self.0 + .to_ascii_lowercase() + .replace("_", "-") + .replace(" ", "-") + ) + } +} + +impl FromStr for Name { + type Err = error::Manifest; + + fn from_str(s: &str) -> Result { + Ok(Self( + s.replace("_", "-").replace(" ", "-").to_ascii_lowercase(), + )) + } +} + +/// a package description, usually verbatim from upstream. +#[derive(Debug, Deserialize, Serialize)] +pub struct Description(String); + +impl Display for Description { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "{}", self.0) + } +} + +impl FromStr for Description { + type Err = error::Manifest; + fn from_str(s: &str) -> Result { + Ok(Self(s.to_string())) + } +} + +/// an architecture supported by an ia package. +#[derive(strum::Display, Debug, Deserialize, Serialize)] +pub enum Architecture { + #[strum(to_string = "all")] + #[serde(rename = "all")] + All, + #[strum(to_string = "aarch64")] + #[serde(rename = "aarch64")] + Aarch64, + #[strum(to_string = "amd64")] + #[serde(rename = "amd64")] + Amd64, + #[strum(to_string = "riscv")] + #[serde(rename = "riscv")] + RiscV, + #[strum(to_string = "other:{0}")] + Other(String), +} diff --git a/crates/ia/src/license.rs b/crates/ia/src/license.rs new file mode 100644 index 0000000..17bd8bd --- /dev/null +++ b/crates/ia/src/license.rs @@ -0,0 +1,42 @@ +use serde::{Deserialize, Serialize}; + +// a license supported by ia packages. these are represented +// as a spdx license expression. +// "other" is included, but its usage in application code is +// discouraged. +#[derive(strum::Display, Debug, Deserialize, Serialize)] +pub enum License { + #[strum(to_string = "gpl-3.0-only")] + #[serde(rename = "gpl-3.0-only")] + Gpl3Only, + #[strum(to_string = "gpl-3.0-or-later")] + #[serde(rename = "gpl-3.0-or-later")] + Gpl3OrLater, + #[strum(to_string = "gpl-2.0-only")] + #[serde(rename = "gpl-2.0-only")] + Gpl2Only, + #[strum(to_string = "gpl-2.0-or-later")] + #[serde(rename = "gpl-2.0-or-later")] + Gpl2OrLater, + #[strum(to_string = "lgpl-3.0-only")] + #[serde(rename = "lgpl-3.0-only")] + Lgpl3Only, + #[strum(to_string = "lgpl-3.0-or-later")] + #[serde(rename = "lgpl-3.0-or-later")] + Lgpl3OrLater, + #[strum(to_string = "bsd-2-clause")] + #[serde(rename = "bsd-2-clause")] + Bsd2, + #[strum(to_string = "bsd-3-clause")] + #[serde(rename = "bsd-3-clause")] + Bsd3, + #[strum(to_string = "mit")] + #[serde(rename = "mit")] + Mit, + #[strum(to_string = "mpl-2.0")] + #[serde(rename = "mpl-2.0")] + Mozilla2, + #[strum(to_string = "other:{0}")] + #[serde(rename = "other:{0}")] + Other(String), +} diff --git a/crates/ia/src/manifest/dependency.rs b/crates/ia/src/manifest/dependency.rs new file mode 100644 index 0000000..141ec0e --- /dev/null +++ b/crates/ia/src/manifest/dependency.rs @@ -0,0 +1,79 @@ +use std::{fmt::Display, str::FromStr}; + +use serde::{de::Visitor, Deserialize, Deserializer, Serialize}; + +use crate::{ + version::{Version, VersionOper}, + Name, +}; + +/// a dependency entry from a manifest. +/// these may be represented in two variants: +/// a version-free name, which will pull the latest version of the package as +/// a dependency, or a versioned name. +#[derive(Debug, Serialize)] +pub struct Dependency(Name, Option<(VersionOper, Version)>); + +impl Dependency { + fn new(name: Name, opped_version: Option<(VersionOper, Version)>) -> Self { + Self(name, opped_version) + } +} + +impl Display for Dependency { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match &self.1 { + None => write!(f, "{}", self.0 .0), + Some((op, version)) => write!(f, "{}{}{}", self.0 .0, op, version), + } + } +} + +struct DependencyVisitor; + +impl<'de> Visitor<'de> for DependencyVisitor { + type Value = Dependency; + + fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result { + formatter.write_str("a version string (e.g., `package_name=1.0`)") + } + + fn visit_str(self, s: &str) -> Result + where + E: serde::de::Error, + { + ["<=", ">=", "=", "<", ">"] + .into_iter() + .find_map(|oper| { + s.rsplit_once(oper) + .map(|(name, version)| { + ( + Name(name.to_string()), + VersionOper::from_str(oper).unwrap_or(VersionOper::Equal), + Version::new(version), + ) + }) + .map(|(n, o, v)| Dependency::new(n, Some((o, v)))) + }) + .or(Some(Dependency::new(Name(s.to_string()), None))) + .ok_or(E::invalid_value(serde::de::Unexpected::Str(s), &self)) + } + + fn visit_string(self, v: String) -> Result + where + E: serde::de::Error, + { + // all hashes are represented in lowercase. this generally handles + // unicode, but hashes currently used by ia use ascii only. + self.visit_str(&v.to_lowercase()) + } +} + +impl<'de> Deserialize<'de> for Dependency { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + deserializer.deserialize_string(DependencyVisitor) + } +} diff --git a/crates/ia/src/manifest/mod.rs b/crates/ia/src/manifest/mod.rs new file mode 100644 index 0000000..747b3e8 --- /dev/null +++ b/crates/ia/src/manifest/mod.rs @@ -0,0 +1,57 @@ +//! creation and processing of package manifest files. + +mod dependency; +use crate::{error, fs::File, version::Revision, Description, Name, Source, Version}; +pub use dependency::Dependency; +use serde::{Deserialize, Serialize}; +use std::{path::PathBuf, str::FromStr}; + +/// a full parsed package manifest. +/// manifests are a representation of the "recipe" used to build the package. +/// a package manifest is the 'recipe' for constructing an ia package. +/// in the future, this will be used to generate a lockfile, which will +/// in turn be used to construct a package. +#[derive(Deserialize, Serialize)] +pub struct Manifest { + pub name: Name, + pub description: Description, + pub version: Version, + pub revision: Revision, + pub sources: Vec, + pub patches: Option>, + pub dependencies: Vec, + pub build_dependencies: Vec, + // #[serde(rename = "configure")] + // pub configure_phase: ConfigurePhase, + // #[serde(rename = "build")] + // pub build_phase: BuildPhase, + // #[serde(rename = "test")] + // pub test_phase: TestPhase, +} + +impl Manifest { + /// deserializes a manifest from an open file reference. + pub fn from_file(mut file: File) -> Result { + let mut file_bytes = Vec::new(); + file.read(&mut file_bytes) + .map(|_| file_bytes) + .map_err(error::Manifest::FS) + .map(|b| String::from_utf8(b).map_err(|_| error::Manifest::FS(error::FS::Read)))? + .map(|s| Self::from_str(&s))? + } + + /// deserializes a manifest from a path. + pub fn from_path(path: &PathBuf) -> Result { + File::open_ambient(path) + .map_err(error::Manifest::FS) + .map(Self::from_file)? + } +} + +impl FromStr for Manifest { + type Err = error::Manifest; + + fn from_str(s: &str) -> Result { + toml::de::from_str(s).map_err(|_| error::Manifest::Parse) + } +} diff --git a/crates/ia/src/source/fetcher/file.rs b/crates/ia/src/source/fetcher/file.rs new file mode 100644 index 0000000..b372458 --- /dev/null +++ b/crates/ia/src/source/fetcher/file.rs @@ -0,0 +1,35 @@ +use std::io::Write; + +use crate::{ + error, + fs::{Dir, Permissions}, + source::Url, +}; + +use super::Fetcher; + +pub struct FileFetcher<'a> { + /// used for manifest-relative file paths. + pub manifest_root: &'a Dir, +} + +impl<'a> FileFetcher<'a> { + pub fn new(manifest_root: &'a Dir) -> Self { + Self { manifest_root } + } +} + +impl<'a> Fetcher for FileFetcher<'_> { + fn fetch_to(&self, url: &Url, dst: &mut dyn Write) -> Result { + let mut src_file = self + .manifest_root + .open_file(url.location(), Permissions::Read) + .map_err(error::Fetcher::FS)?; + + src_file.copy_to(dst).map_err(error::Fetcher::FS) + } + + fn scheme(&self) -> &'static str { + "file" + } +} diff --git a/crates/ia/src/source/fetcher/mod.rs b/crates/ia/src/source/fetcher/mod.rs new file mode 100644 index 0000000..adbec20 --- /dev/null +++ b/crates/ia/src/source/fetcher/mod.rs @@ -0,0 +1,11 @@ +pub mod file; + +use std::io::Write; + +use crate::{error, source::Url}; + +/// a construct capable of fetching a particular source. +pub trait Fetcher { + fn fetch_to(&self, url: &Url, dst: &mut dyn Write) -> Result; + fn scheme(&self) -> &'static str; +} diff --git a/crates/ia/src/source/mod.rs b/crates/ia/src/source/mod.rs new file mode 100644 index 0000000..57de299 --- /dev/null +++ b/crates/ia/src/source/mod.rs @@ -0,0 +1,134 @@ +pub mod fetcher; + +use std::{fmt::Display, str::FromStr}; + +use fetcher::Fetcher; +use serde::{de::Visitor, Deserialize, Deserializer, Serialize}; + +use crate::{error, fs::File, Hashstring, Name}; + +/// a source url, stored as a pair of strings (scheme, location). +/// the [Display] implementation concatenates the two strings with a `:`. +#[derive(Debug, Serialize)] +pub struct Url((String, String)); + +impl Url { + /// returns the url scheme, such as `http` or `file`. + pub fn scheme(&self) -> String { + self.0 .0.clone() + } + + /// returns the location, or tail of the url. + /// this is the remainder after removing the scheme. + pub fn location(&self) -> String { + self.0 .1.clone() + } +} + +impl FromStr for Url { + type Err = error::Source; + + fn from_str(s: &str) -> Result { + s.split_once(':') + .map(|(scheme, tail)| Self((scheme.to_owned(), tail.to_owned()))) + .ok_or(Self::Err::BadUrl(s.to_string())) + } +} + +impl Display for Url { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "{}:{}", self.0 .0, self.0 .1) + } +} + +struct UrlVisitor; + +impl<'de> Visitor<'de> for UrlVisitor { + type Value = Url; + + fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result { + formatter.write_str("a source url") + } + + fn visit_str(self, v: &str) -> Result + where + E: serde::de::Error, + { + Url::from_str(v).map_err(|_| E::invalid_type(serde::de::Unexpected::Str(v), &self)) + } + + fn visit_string(self, v: String) -> Result + where + E: serde::de::Error, + { + self.visit_str(&v) + } +} + +impl<'de> Deserialize<'de> for Url { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + deserializer.deserialize_string(UrlVisitor) + } +} + +/// a source entry, or "input". a url pointing to a source file of some +/// kind. +/// the currently-supported scheme handlers are: +/// - `file:`, which is a local file +/// - _for technical reasons, this is handled differently to other +/// retrieval mechanisms. local file paths are not legitimate urls, and +/// local file access requires escaping the sandbox for ambient file +/// access._ +/// - `http://` and `https://`, which interact over HTTP/HTTPS protocols +/// respectively +/// - `git://`, which interacts over the git DVCS protocol +/// - `sftp://`, which interacts over the SSH File Transfer Protocol +/// when a source is created, ia will attempt to assign a fetcher to the +/// source based on the scheme of its url. if this cannot be performed, +/// the creation of the source will fail. +#[derive(Deserialize, Serialize)] +pub struct Source { + pub name: Name, + pub url: Url, + #[serde(rename = "hash")] + pub hashstring: Hashstring, + #[serde(skip)] + fetcher: Option>, +} + +impl Source { + /// creates a new source from a name, url, and hash. + /// no handler is assigned at this time. + pub fn new(name: String, url: String, hash: String) -> Result { + Ok(Self { + name: Name(name), + url: Url::from_str(&url)?, + hashstring: Hashstring::from_str(&hash).map_err(error::Source::Hash)?, + fetcher: None, + }) + } + + /// attaches a fetcher to a source, allowing it to be retrieved via [Self::fetch_to]. + pub fn with_fetcher(self, fetcher: Box) -> Result { + Ok(Self { + fetcher: Some(fetcher), + ..self + }) + } + + /// fetches this source, via its assigned fetcher, to the designated file. + /// if this source does not have a handler assigned (via e.g., + /// [Self::with_fetcher]), this function will fail. + pub fn fetch_to(self, mut dst: File) -> Result { + let fetcher = self + .fetcher + .ok_or(error::Source::NoFetcher(self.name.to_string()))?; + + fetcher + .fetch_to(&self.url, &mut dst) + .map_err(error::Source::Fetcher) + } +} diff --git a/crates/ia/src/tests/fetcher/file.rs b/crates/ia/src/tests/fetcher/file.rs new file mode 100644 index 0000000..0c74ef4 --- /dev/null +++ b/crates/ia/src/tests/fetcher/file.rs @@ -0,0 +1,46 @@ +use std::{io::Read, path::PathBuf, str::FromStr}; + +use crate::{ + fs::{Dir, Permissions}, + source::{ + fetcher::{file::FileFetcher, Fetcher}, + Url, + }, + tests::fetcher::test_buildroot, +}; + +const TEST_PACKAGE_SOURCE_FILENAME: &str = "./test-source.txt"; +const TEST_PACKAGE_SOURCE_URL: &str = "file:./test-source.txt"; +const TEST_PACKAGE_ROOT: &str = concat!(env!("CARGO_MANIFEST_DIR"), "/fixtures/package"); +const TEST_MANIFEST_SOURCE_FILE_BODY_STRING: &str = + include_str!("../../../fixtures/package/test-source.txt"); + +fn package_root() -> Dir { + PathBuf::from_str(TEST_PACKAGE_ROOT) + .map(Dir::open_ambient) + .unwrap() + .unwrap() +} + +#[test] +fn can_fetch_file() { + let pkg_root = package_root(); + let build_root = test_buildroot(); + + let url = Url::from_str(TEST_PACKAGE_SOURCE_URL).unwrap(); + + let mut dst_file = build_root + .open_file(TEST_PACKAGE_SOURCE_FILENAME, Permissions::WriteCreate) + .unwrap(); + FileFetcher::new(&pkg_root) + .fetch_to(&url, &mut dst_file) + .unwrap(); + + let mut dst_file = build_root + .open_file(TEST_PACKAGE_SOURCE_FILENAME, Permissions::Read) + .unwrap(); + let mut buf = String::new(); + dst_file.read_to_string(&mut buf).unwrap(); + + assert_eq!(buf, TEST_MANIFEST_SOURCE_FILE_BODY_STRING); +} diff --git a/crates/ia/src/tests/fetcher/mod.rs b/crates/ia/src/tests/fetcher/mod.rs new file mode 100644 index 0000000..65031bd --- /dev/null +++ b/crates/ia/src/tests/fetcher/mod.rs @@ -0,0 +1,8 @@ +use crate::fs::{Dir, TempDir}; + +mod file; + +/// creates the temporary buildroot used for testing. +pub(crate) fn test_buildroot() -> Dir { + TempDir::new().unwrap().into_dir().unwrap() +} diff --git a/crates/ia/src/tests/hashstring.rs b/crates/ia/src/tests/hashstring.rs new file mode 100644 index 0000000..59f3293 --- /dev/null +++ b/crates/ia/src/tests/hashstring.rs @@ -0,0 +1,48 @@ +use std::str::FromStr; + +use crate::{hashstring::HashAlgorithm, Hashstring}; + +const SHA2_HASHSTR: &str = "sha2:3bb12eda3c298db5de25597f54d924f2e17e78a26ad8953ed8218ee682f0bbbe9021e2f3009d152c911bf1f25ec683a902714166767afbd8e5bd0fb0124ecb8a"; +const SHA2_HASHSTR_ALG: HashAlgorithm = HashAlgorithm::Sha2; +const SHA2_HASHSTR_VALUE: &str = "3bb12eda3c298db5de25597f54d924f2e17e78a26ad8953ed8218ee682f0bbbe9021e2f3009d152c911bf1f25ec683a902714166767afbd8e5bd0fb0124ecb8a"; +const SHA3_HASHSTR: &str = "sha3:e6da59e7349fb06a3de52ab3a2b383090f80d45ea8489d76b231d580ccf01fb112e509dedd5cc09bead4aa54455ca4c66cd46abe35c061325802d5df12b2a55d"; +const SHA3_HASHSTR_ALG: HashAlgorithm = HashAlgorithm::Sha3; +const SHA3_HASHSTR_VALUE: &str = "e6da59e7349fb06a3de52ab3a2b383090f80d45ea8489d76b231d580ccf01fb112e509dedd5cc09bead4aa54455ca4c66cd46abe35c061325802d5df12b2a55d"; +const INVALIDALG_HASHSTR: &str = "abcd213:3bb12eda3c298db5de25597f54d924f2e17e78a26ad8953ed8218ee682f0bbbe9021e2f3009d152c911bf1f25ec683a902714166767afbd8e5bd0fb0124ecb8a"; +const INVALIDVALUE_HASHSTR: &str = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; + +#[test] +fn can_parse_sha2_alg() { + let hash = Hashstring::from_str(SHA2_HASHSTR).unwrap(); + assert_eq!(hash.algorithm, SHA2_HASHSTR_ALG) +} + +#[test] +fn can_parse_sha2_value() { + let hash = Hashstring::from_str(SHA2_HASHSTR).unwrap(); + assert_eq!(hash.value.to_string(), SHA2_HASHSTR_VALUE.to_owned()) +} + +#[test] +fn can_parse_sha3_alg() { + let hash = Hashstring::from_str(SHA3_HASHSTR).unwrap(); + assert_eq!(hash.algorithm, SHA3_HASHSTR_ALG) +} + +#[test] +fn can_parse_sha3_value() { + let hash = Hashstring::from_str(SHA3_HASHSTR).unwrap(); + assert_eq!(hash.value.to_string(), SHA3_HASHSTR_VALUE.to_owned()) +} + +#[test] +fn rejects_invalid_alg() { + let hash = Hashstring::from_str(INVALIDALG_HASHSTR); + assert!(hash.is_err()) +} + +#[test] +fn rejects_invalid_hash() { + let hash = Hashstring::from_str(INVALIDVALUE_HASHSTR); + assert!(hash.is_err()) +} diff --git a/crates/ia/src/tests/manifest.rs b/crates/ia/src/tests/manifest.rs new file mode 100644 index 0000000..74dada0 --- /dev/null +++ b/crates/ia/src/tests/manifest.rs @@ -0,0 +1,24 @@ +use super::{TEST_MANIFEST_STRING, TEST_PACKAGE_NAME, TEST_PACKAGE_REVISION, TEST_PACKAGE_VERSION}; +use crate::{version::Revision, Manifest, Version}; + +#[test] +fn can_parse_toml() { + let manifest_toml: toml::Table = toml::from_str(TEST_MANIFEST_STRING).unwrap(); + assert_eq!(manifest_toml["name"].as_str(), Some(TEST_PACKAGE_NAME)); +} + +#[test] +fn can_parse_manifest() { + let manifest: Manifest = toml::from_str(TEST_MANIFEST_STRING).unwrap(); + assert_eq!(manifest.name.to_string(), TEST_PACKAGE_NAME); +} + +#[test] +fn can_parse_version() { + let version = Version::new(TEST_PACKAGE_VERSION); + let revision = Revision::new(TEST_PACKAGE_REVISION); + let manifest: Manifest = toml::from_str(TEST_MANIFEST_STRING).unwrap(); + + assert_eq!(manifest.version, version); + assert_eq!(manifest.revision, revision); +} diff --git a/crates/ia/src/tests/mod.rs b/crates/ia/src/tests/mod.rs new file mode 100644 index 0000000..ae3f687 --- /dev/null +++ b/crates/ia/src/tests/mod.rs @@ -0,0 +1,15 @@ +mod fetcher; +mod hashstring; +mod manifest; + +/// a string containing an entire unparsed manifest file. +pub(crate) const TEST_MANIFEST_STRING: &str = include_str!("../../fixtures/package/manifest.toml"); + +/// the package [Name](crate::Name) as per the test manifest file. +pub(crate) const TEST_PACKAGE_NAME: &str = "test-package"; + +/// the package [Version](crate::Version) as per the test manifest file. +pub(crate) const TEST_PACKAGE_VERSION: &str = "1.2.3-git"; + +/// the package [Revision](crate::version::Revision) as per the test manifest file. +pub(crate) const TEST_PACKAGE_REVISION: u8 = 42; diff --git a/crates/ia/src/version.rs b/crates/ia/src/version.rs new file mode 100644 index 0000000..254e385 --- /dev/null +++ b/crates/ia/src/version.rs @@ -0,0 +1,72 @@ +use std::{fmt::Display, str::FromStr}; + +use serde::{Deserialize, Serialize}; + +use crate::error; + +// a package revision. +// this is used by maintainers where package updates are required +// that do not include changes from upstream. +#[derive(Clone, Debug, Deserialize, PartialEq, Serialize, Eq)] +pub struct Revision(u8); + +impl Revision { + pub fn new(rev: u8) -> Self { + Self(rev) + } +} + +/// an operator applied to a version requirement, allowing a package +/// to pin a dependency to a specific version or range of versions. +/// +/// while only one version operator should be present per string, the version +/// operators are matched in the following order: +/// - `<=` +/// - `>=` +/// - `=` +/// - `<` +/// - `>` +#[derive(strum::Display, Debug, Deserialize, PartialEq, Serialize)] +pub enum VersionOper { + #[strum(to_string = "<")] + LessThan, + #[strum(to_string = "<=")] + LessThanOrEqual, + #[strum(to_string = "=")] + Equal, + #[strum(to_string = ">=")] + GreaterThanOrEqual, + #[strum(to_string = ">")] + GreaterThan, +} + +impl FromStr for VersionOper { + type Err = error::Manifest; + + fn from_str(s: &str) -> Result { + match s { + "<=" => Ok(VersionOper::LessThanOrEqual), + ">=" => Ok(VersionOper::GreaterThanOrEqual), + "=" => Ok(VersionOper::Equal), + "<" => Ok(VersionOper::LessThan), + ">" => Ok(VersionOper::GreaterThan), + _ => Err(error::Manifest::Parse), + } + } +} + +/// a package's version. +#[derive(Clone, Debug, Deserialize, PartialEq, Serialize)] +pub struct Version(String); + +impl Display for Version { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "{}", self.0) + } +} + +impl Version { + pub fn new>(upstream: T) -> Self { + Version(upstream.as_ref().to_string()) + } +}