Initial import

In the beginning there was darkness.
So I spoke "git init".
And there was a git repository.

7 files changed, 823 insertions, 0 deletions

diff --git a/librepology/Cargo.toml b/librepology/Cargo.toml
new file mode 100644
index 0000000..7379b10
--- /dev/null
+++ b/librepology/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "librepology"
+version = "0.1.0"
+authors = ["Matthias Beyer <matthias.beyer@atos.net>"]
+edition = "2018"
+
+[dependencies]
+serde = "1"
+serde_derive = "1"
+serde_json = "1"
+url = "1.7"
+url_serde = "0.2"
+futures = "*"
+failure = "0.1"
+log = "0.4"
+derive_more = "0.14"
+curl = "0.4"
diff --git a/librepology/LICENSE b/librepology/LICENSE
new file mode 100644
index 0000000..2f8ed18
--- /dev/null
+++ b/librepology/LICENSE
@@ -0,0 +1,374 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
+
diff --git a/librepology/src/lib.rs b/librepology/src/lib.rs
new file mode 100644
index 0000000..d7192f2
--- /dev/null
+++ b/librepology/src/lib.rs
@@ -0,0 +1,12 @@
+extern crate failure;
+extern crate serde;
+extern crate serde_json;
+extern crate url;
+extern crate url_serde;
+extern crate curl;
+
+#[macro_use] extern crate serde_derive;
+#[macro_use] extern crate log;
+#[macro_use] extern crate derive_more;
+
+pub mod v1;
diff --git a/librepology/src/v1/api.rs b/librepology/src/v1/api.rs
new file mode 100644
index 0000000..d740d44
--- /dev/null
+++ b/librepology/src/v1/api.rs
@@ -0,0 +1,73 @@
+use std::io::{Stdin, Read};
+use std::cell::RefCell;
+use std::ops::Deref;
+use std::ops::DerefMut;
+
+use failure::Fallible as Result;
+use failure::Error;
+
+use crate::v1::types::Problem;
+use crate::v1::types::Package;
+
+pub trait Api {
+    fn project<N: AsRef<str>>(&self, name: N) -> Result<Vec<Package>>;
+
+    fn problems_for_repo<R: AsRef<str>>(&self, repo: R) -> Result<Vec<Problem>>;
+
+    fn problems_for_maintainer<M: AsRef<str>>(&self, maintainer: M) -> Result<Vec<Problem>>;
+}
+
+
+//
+// Api implemented for StdIn (via a Wrapper for interior mutability)
+//
+// This way we can read the data from stdin and process it
+//
+
+pub struct StdinWrapper(RefCell<Stdin>);
+
+impl From<Stdin> for StdinWrapper {
+    fn from(inner: Stdin) -> Self {
+        StdinWrapper(RefCell::new(inner))
+    }
+}
+
+impl Deref for StdinWrapper {
+    type Target = RefCell<Stdin>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl DerefMut for StdinWrapper {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+impl Api for StdinWrapper {
+
+    fn project<N: AsRef<str>>(&self, _name: N) -> Result<Vec<Package>> {
+        let s = read_to_string(self.0.try_borrow_mut()?.deref_mut())?;
+        serde_json::de::from_str(&s).map_err(Error::from)
+    }
+
+    fn problems_for_repo<R: AsRef<str>>(&self, _repo: R) -> Result<Vec<Problem>> {
+        let s = read_to_string(self.0.try_borrow_mut()?.deref_mut())?;
+        serde_json::de::from_str(&s).map_err(Error::from)
+    }
+
+    fn problems_for_maintainer<M: AsRef<str>>(&self, _maintainer: M) -> Result<Vec<Problem>> {
+        let s = read_to_string(self.0.try_borrow_mut()?.deref_mut())?;
+        serde_json::de::from_str(&s).map_err(Error::from)
+    }
+
+}
+
+fn read_to_string(input: &mut Read) -> Result<String> {
+    let mut buffer = String::new();
+    let read = input.read_to_string(&mut buffer)?;
+    trace!("Read {} bytes from stdin", read);
+    Ok(buffer)
+}
diff --git a/librepology/src/v1/mod.rs b/librepology/src/v1/mod.rs
new file mode 100644
index 0000000..cd4d2fe
--- /dev/null
+++ b/librepology/src/v1/mod.rs
@@ -0,0 +1,3 @@
+pub mod restapi;
+pub mod api;
+pub mod types;
diff --git a/librepology/src/v1/restapi.rs b/librepology/src/v1/restapi.rs
new file mode 100644
index 0000000..df26135
--- /dev/null
+++ b/librepology/src/v1/restapi.rs
@@ -0,0 +1,67 @@
+use std::result::Result as RResult;
+
+use failure::Error;
+use failure::Fallible as Result;
+use curl::easy::Easy2;
+
+use crate::v1::types::{Package, Problem};
+use crate::v1::api::Api;
+
+struct Collector(Vec<u8>);
+impl curl::easy::Handler for Collector {
+    fn write(&mut self, data: &[u8]) -> RResult<usize, curl::easy::WriteError> {
+        self.0.extend_from_slice(data);
+        Ok(data.len())
+    }
+}
+
+pub struct RestApi {
+    /// Base url
+    repology: String,
+}
+
+impl RestApi {
+    pub fn new(repology: String) -> Self {
+        Self { repology }
+    }
+
+    fn send_request<U: AsRef<str>>(&self, request: U) -> Result<String> {
+        let mut easy = Easy2::new(Collector(Vec::new()));
+        easy.get(true)?;
+        easy.url(request.as_ref())?;
+        easy.perform()?;
+        let content = easy.get_ref().0.clone(); // TODO: Ugh...
+        String::from_utf8(content).map_err(Error::from)
+    }
+}
+
+impl Api for RestApi {
+
+    fn project<N: AsRef<str>>(&self, name: N) -> Result<Vec<Package>> {
+        let request_url = format!("{}api/v1/project/{}", self.repology, name.as_ref());
+
+        self.send_request(request_url)
+            .and_then(|r| {
+                serde_json::from_str(&r).map_err(Error::from)
+            })
+    }
+
+    fn problems_for_repo<R: AsRef<str>>(&self, repo: R) -> Result<Vec<Problem>> {
+        let request_url = format!("{}api/v1/repository/{}/problems", self.repology, repo.as_ref());
+
+        self.send_request(request_url)
+            .and_then(|r| {
+                serde_json::from_str(&r).map_err(Error::from)
+            })
+    }
+
+    fn problems_for_maintainer<M: AsRef<str>>(&self, maintainer: M) -> Result<Vec<Problem>> {
+        let request_url = format!("{}api/v1/maintainer/{}/problems", self.repology, maintainer.as_ref());
+
+        self.send_request(request_url)
+            .and_then(|r| {
+                serde_json::from_str(&r).map_err(Error::from)
+            })
+    }
+
+}
\ No newline at end of file
diff --git a/librepology/src/v1/types.rs b/librepology/src/v1/types.rs
new file mode 100644
index 0000000..7f5276a
--- /dev/null
+++ b/librepology/src/v1/types.rs
@@ -0,0 +1,277 @@
+use std::ops::Deref;
+
+use url::Url;
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Package {
+    /// name of repository for this package
+    repo: Repo,
+
+    /// name
+    name: Name,
+
+    /// version
+    version: Version,
+
+    /// package status, one of newest, devel, unique, outdated, legacy, rolling, noscheme, incorrect, untrusted, ignored
+    status: Option<Status>,
+
+    /// one-line description of the package
+    summary: Option<Summary>,
+
+    /// list of package licenses
+    licenses: Option<Vec<License>>,
+
+    /// list of package maintainers
+    maintainers: Option<Vec<Maintainer>>,
+
+    /// list of package webpages
+    www: Option<Vec<Www>>,
+
+    /// list of package downloads
+    downloads: Option<Vec<Download>>,
+}
+
+impl Package {
+    pub fn repo(&self) -> &Repo {
+        &self.repo
+    }
+
+    pub fn name(&self) -> &Name {
+        &self.name
+    }
+
+    pub fn version(&self) -> &Version {
+        &self.version
+    }
+
+    pub fn status(&self) -> Option<&Status> {
+        self.status.as_ref()
+    }
+
+    pub fn summary(&self) -> Option<&Summary> {
+        self.summary.as_ref()
+    }
+
+    pub fn licenses(&self) -> Option<&Vec<License>> {
+        self.licenses.as_ref()
+    }
+
+    pub fn maintainers(&self) -> Option<&Vec<Maintainer>> {
+        self.maintainers.as_ref()
+    }
+
+    pub fn www(&self) -> Option<&Vec<Www>> {
+        self.www.as_ref()
+    }
+
+    pub fn downloads(&self) -> Option<&Vec<Download>> {
+        self.downloads.as_ref()
+    }
+
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Problem {
+    #[serde(rename = "repo")]
+    repo: Repo,
+
+    #[serde(rename = "name")]
+    name: Name,
+
+    #[serde(rename = "effname")]
+    effname: EffName,
+
+    #[serde(rename = "maintainer")]
+    maintainer: Maintainer,
+
+    #[serde(rename = "problem")]
+    problem: String,
+}
+
+impl Problem {
+    pub fn repo(&self) -> &Repo {
+        &self.repo
+    }
+
+    pub fn name(&self) -> &Name {
+        &self.name
+    }
+
+    pub fn effname(&self) -> &EffName {
+        &self.effname
+    }
+
+    pub fn maintainer(&self) -> &Maintainer {
+        &self.maintainer
+    }
+
+    pub fn problem_description(&self) -> &String {
+        &self.problem
+    }
+}
+
+// name of repository for this package
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Repo(String);
+
+impl Deref for Repo {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// package name as in repository (if different from version)
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Name(String);
+
+impl Deref for Name {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// package version (sanitized)
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Version(String);
+
+impl Deref for Version {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// package status
+#[derive(Clone, Debug, Serialize, Deserialize, Display)]
+pub enum Status {
+    #[serde(rename = "newest")]
+    #[display(fmt = "newest")]
+    Newest,
+
+    #[serde(rename = "devel")]
+    #[display(fmt = "devel")]
+    Devel,
+
+    #[serde(rename = "unique")]
+    #[display(fmt = "unique")]
+    Unique,
+
+    #[serde(rename = "outdated")]
+    #[display(fmt = "outdated")]
+    Outdated,
+
+    #[serde(rename = "legacy")]
+    #[display(fmt = "legacy")]
+    Legacy,
+
+    #[serde(rename = "rolling")]
+    #[display(fmt = "rolling")]
+    Rolling,
+
+    #[serde(rename = "noscheme")]
+    #[display(fmt = "noscheme")]
+    Noscheme,
+
+    #[serde(rename = "incorrect")]
+    #[display(fmt = "incorrect")]
+    Incorrect,
+
+    #[serde(rename = "untrusted")]
+    #[display(fmt = "untrusted")]
+    Untrusted,
+
+    #[serde(rename = "ignored")]
+    #[display(fmt = "ignored")]
+    Ignored,
+}
+
+// one-line description of the package
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Summary(String);
+
+impl Deref for Summary {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// list of package categories
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Category(String);
+
+impl Deref for Category {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// list of package licenses
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct License(String);
+
+impl Deref for License {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// list of package maintainers
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Maintainer(String);
+
+impl Deref for Maintainer {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// list of package webpages
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Www(#[serde(with = "url_serde")] Url);
+
+impl Deref for Www {
+    type Target = Url;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// list of package downloads
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Download(#[serde(with = "url_serde")] Url);
+
+impl Deref for Download {
+    type Target = Url;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+// list of package downloads
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct EffName(String);
+
+impl Deref for EffName {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+