Merging upstream version 1.72.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 506 insertions, 190 deletions

diff --git a/vendor/gix-revision/.cargo-checksum.json b/vendor/gix-revision/.cargo-checksum.json
index a4281e115..434b15248 100644
--- a/vendor/gix-revision/.cargo-checksum.json
+++ b/vendor/gix-revision/.cargo-checksum.json
@@ -1 +1 @@
-{"files":{"CHANGELOG.md":"273973dd2b8016144e2b944e12b86e82b4e8fc4215696fa2d9ce8293b45e09bf","Cargo.toml":"1a6d0c90d98126520ee5309f4622803c7ddb529467504106bcd055036ab00721","README.md":"809c88a6c70ec74eabc883e40f5be368890c1929f7575e49e38256cde671f813","src/describe.rs":"2eebe90d99919f4dbb5a2bb2c0113d7c74cc199ad78c2182bf7964ce6639deb0","src/lib.rs":"17f9751f585ae2bc1b16691a4834898b583508c0de8276fcb5cf1d6c4c045e92","src/spec/mod.rs":"669af4fa43750d52fb2b4e65bb0031a27396bae574df6e02c40839bb7558dcae","src/spec/parse/delegate.rs":"b00c2d9ab8fdea72200f7f781662bf07f31164cb8b5a9831824c8a8d9d0c2277","src/spec/parse/function.rs":"3446a5f372aeeda60e5cf1507bf9c8a25981b5f2d33afe7a3ce787f15f92043c","src/spec/parse/mod.rs":"a5a565d483088cd3a4a48cad09fa78f9eae2f18fd844ffb0b9fb0afd4bfd7617","src/types.rs":"62395bf474daf0a09a4de5c6d11e5b4354033b2f1fff2edcbd3b11d87841edc2"},"package":"810f35e9afeccca999d5d348b239f9c162353127d2e13ff3240e31b919e35476"}
\ No newline at end of file
+{"files":{"CHANGELOG.md":"30d8b9a076cf1efa365c29ba2197e8bd9cdc9968b3846732ceb9d024165f304c","Cargo.toml":"3ac849639d24b10be26527b927f81e34fdcb90c396dd8b0f346c82d19cf3864a","LICENSE-APACHE":"cb4780590812826851ba250f90bed0ed19506ec98f6865a0e2e20bbf62391ff9","LICENSE-MIT":"49df47913ab2beafe8dc45607877ae64198bf0eee64aaad3e82ed9e4d27424e8","README.md":"809c88a6c70ec74eabc883e40f5be368890c1929f7575e49e38256cde671f813","src/describe.rs":"6b9a4c4e9bc7ebba84efedb0036ebb90bb7a4a547859a556986076cb32bd5128","src/lib.rs":"1456d5eef6a545d5c6e230b120970bf80c0372ca6592c8eb9b79ddbbd0bbdbb6","src/spec/mod.rs":"f95f2d547c913aace4a0e895b9cfda7d38400f171886a85f6ee2f73313d27950","src/spec/parse/delegate.rs":"b00c2d9ab8fdea72200f7f781662bf07f31164cb8b5a9831824c8a8d9d0c2277","src/spec/parse/function.rs":"fa7943761759b1f7b292e2f31ef510bc7b9efd5f6ce89746e5dc53ab963e1d9f","src/spec/parse/mod.rs":"a5a565d483088cd3a4a48cad09fa78f9eae2f18fd844ffb0b9fb0afd4bfd7617"},"package":"5044f56cd7a487ce9b034cbe0252ae0b6b47ff56ca3dabd79bc30214d0932cd7"}
\ No newline at end of file
diff --git a/vendor/gix-revision/CHANGELOG.md b/vendor/gix-revision/CHANGELOG.md
index 8df1aff19..18c8cd63c 100644
--- a/vendor/gix-revision/CHANGELOG.md
+++ b/vendor/gix-revision/CHANGELOG.md
@@ -5,6 +5,174 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.15.2 (2023-06-10)
+
+<csr-id-4deea8a9cf5a9e77ec138311267c9853172db14c/>
+
+### Other
+
+ - <csr-id-4deea8a9cf5a9e77ec138311267c9853172db14c/> Add information on how to turn `LazyCommit` into commit.
+   This is to more easily support custm graph walks later.
+
+### Commit Statistics
+
+<csr-read-only-do-not-edit/>
+
+ - 5 commits contributed to the release.
+ - 3 days passed between releases.
+ - 1 commit was understood as [conventional](https://www.conventionalcommits.org).
+ - 0 issues like '(#ID)' were seen in commit messages
+
+### Commit Details
+
+<csr-read-only-do-not-edit/>
+
+<details><summary>view details</summary>
+
+ * **Uncategorized**
+    - Prepare changelogs prior to release ([`298f3d7`](https://github.com/Byron/gitoxide/commit/298f3d7359c5b183314d8c584e45dcdd559d88b3))
+    - Merge branch 'walk-with-commitgraph' ([`fdee9a2`](https://github.com/Byron/gitoxide/commit/fdee9a22873a13ae644d3dc92f8fe93f8f0266c0))
+    - Adapt to changes in `gix-revwalk` ([`f7d95d1`](https://github.com/Byron/gitoxide/commit/f7d95d189af1422a7ba48db1857452e32e1d9db9))
+    - Add new `gix-revwalk` crate for support types related to revision walking. ([`13ce887`](https://github.com/Byron/gitoxide/commit/13ce887682f5c31d1f78a63613ca97b811e4ffba))
+    - Add information on how to turn `LazyCommit` into commit. ([`4deea8a`](https://github.com/Byron/gitoxide/commit/4deea8a9cf5a9e77ec138311267c9853172db14c))
+</details>
+
+## 0.15.1 (2023-06-06)
+
+### Bug Fixes
+
+ - <csr-id-fd2593cc1e5824687f3bcc4be4badc3d7920e5fc/> avoid duplicate error message
+   "There was an error looking up a commit" could be printed twice in error stacks
+   due to a copy-paste error.
+
+### Commit Statistics
+
+<csr-read-only-do-not-edit/>
+
+ - 3 commits contributed to the release.
+ - 1 commit was understood as [conventional](https://www.conventionalcommits.org).
+ - 0 issues like '(#ID)' were seen in commit messages
+
+### Commit Details
+
+<csr-read-only-do-not-edit/>
+
+<details><summary>view details</summary>
+
+ * **Uncategorized**
+    - Release gix-revision v0.15.1, gix v0.45.1 ([`11766a0`](https://github.com/Byron/gitoxide/commit/11766a0a82754fee9918ccdb8eaf92af6d2561ba))
+    - Merge branch 'adjustments-for-cargo' ([`04f011c`](https://github.com/Byron/gitoxide/commit/04f011c3c3e49e87a3b868d4bf6e77a361b96da8))
+    - Avoid duplicate error message ([`fd2593c`](https://github.com/Byron/gitoxide/commit/fd2593cc1e5824687f3bcc4be4badc3d7920e5fc))
+</details>
+
+## 0.15.0 (2023-06-06)
+
+<csr-id-dbc6cbb4363c2532f81b0bd6e351c4577bb9e9a3/>
+
+### Chore
+
+ - <csr-id-dbc6cbb4363c2532f81b0bd6e351c4577bb9e9a3/> inline format args
+
+### New Features
+
+ - <csr-id-1bd93bedd2f184510239c50c345d3dbc41d7d13b/> allow graph sharing by unifying `Flags` type.
+   This makes the graph used in `gix-negotiate` shareable by callers, which can
+   do their own traversal and store their own flags. The knowlege of this traversal
+   can be kept using such shared flags, like the `PARSED` bit which should be set whenever
+   parents are traversed.
+   
+   That way we are able to emulate the algorithms git uses perfectly, as we keep exactly the
+   same state.
+ - <csr-id-9ab205102eacaf0758c143941f43831a481a1f06/> various improvements to the API
+   * make `CommitterTimestamp` available as type, making the code using it more descriptive.
+* add `new()` to `PriorityQueue`
+* add `Graph::try_lookup_and_insert_default()`
+* add `Debug` impl for `Graph`
+
+### New Features (BREAKING)
+
+ - <csr-id-11ad8a890a6233befb5d2b6b41caadbcb296c3f5/> Add version of Graph that handles fully-parsed commits
+   This renames `graph::Commit` to `graph::LazyCommit` to make space for `graph::Commit` to be a fully owned.
+   `LazyCommit::to_owned()` was added to obtain fully owned `Commit` instances.
+   Rename `Graph::try_lookup_and_insert()` to `Graph::try_lookup_or_insert()` and
+   `Graph::try_lookup_and_insert_default()` to `Graph::try_lookup_or_insert_default()`
+   
+   Additionally, add the `peek()` and `iter_unordered()` method to the `PriorityQueue`, along with an implementation for `Clone`
+   Rename `PriorityQueue::iter_random()` to `::iter_unordered()`.
+
+### Commit Statistics
+
+<csr-read-only-do-not-edit/>
+
+ - 15 commits contributed to the release over the course of 13 calendar days.
+ - 18 days passed between releases.
+ - 4 commits were understood as [conventional](https://www.conventionalcommits.org).
+ - 0 issues like '(#ID)' were seen in commit messages
+
+### Commit Details
+
+<csr-read-only-do-not-edit/>
+
+<details><summary>view details</summary>
+
+ * **Uncategorized**
+    - Release gix-date v0.5.1, gix-hash v0.11.2, gix-features v0.30.0, gix-actor v0.21.0, gix-path v0.8.1, gix-glob v0.8.0, gix-quote v0.4.4, gix-attributes v0.13.0, gix-chunk v0.4.2, gix-commitgraph v0.16.0, gix-config-value v0.12.1, gix-fs v0.2.0, gix-tempfile v6.0.0, gix-utils v0.1.2, gix-lock v6.0.0, gix-validate v0.7.5, gix-object v0.30.0, gix-ref v0.30.0, gix-sec v0.8.1, gix-config v0.23.0, gix-command v0.2.5, gix-prompt v0.5.1, gix-url v0.19.0, gix-credentials v0.15.0, gix-diff v0.30.0, gix-discover v0.19.0, gix-hashtable v0.2.1, gix-ignore v0.3.0, gix-bitmap v0.2.4, gix-traverse v0.26.0, gix-index v0.17.0, gix-mailmap v0.13.0, gix-revision v0.15.0, gix-negotiate v0.2.0, gix-pack v0.36.0, gix-odb v0.46.0, gix-packetline v0.16.2, gix-transport v0.32.0, gix-protocol v0.33.0, gix-refspec v0.11.0, gix-worktree v0.18.0, gix v0.45.0, safety bump 29 crates ([`9a9fa96`](https://github.com/Byron/gitoxide/commit/9a9fa96fa8a722bddc5c3b2270b0edf8f6615141))
+    - `just fmt` ([`ffc1276`](https://github.com/Byron/gitoxide/commit/ffc1276e0c991ac33ce842f5dca0b45ac69680c0))
+    - Prepare changelogs prior to release ([`8f15cec`](https://github.com/Byron/gitoxide/commit/8f15cec1ec7d5a9d56bb158f155011ef2bb3539b))
+    - Merge branch 'integrate-gix-negotiate' ([`ae845de`](https://github.com/Byron/gitoxide/commit/ae845dea6cee6523c88a23d7a14293589cf8092f))
+    - Allow graph sharing by unifying `Flags` type. ([`1bd93be`](https://github.com/Byron/gitoxide/commit/1bd93bedd2f184510239c50c345d3dbc41d7d13b))
+    - Add version of Graph that handles fully-parsed commits ([`11ad8a8`](https://github.com/Byron/gitoxide/commit/11ad8a890a6233befb5d2b6b41caadbcb296c3f5))
+    - Merge branch 'auto-clippy' ([`dbf8aa1`](https://github.com/Byron/gitoxide/commit/dbf8aa19d19109195d0274928eae4b94f248cd88))
+    - Autofix map-or-unwrap clippy lint (and manual fix what was left) ([`2087032`](https://github.com/Byron/gitoxide/commit/2087032b5956dcd82bce6ac57e530e8724b57f17))
+    - Merge branch 'main' into auto-clippy ([`3ef5c90`](https://github.com/Byron/gitoxide/commit/3ef5c90aebce23385815f1df674c1d28d58b4b0d))
+    - Merge pull request #864 from nyurik/lint-fmt ([`279dc09`](https://github.com/Byron/gitoxide/commit/279dc09446f41d7f1d76350fbfafb444e53cd7da))
+    - Merge branch 'blinxen/main' ([`9375cd7`](https://github.com/Byron/gitoxide/commit/9375cd75b01aa22a0e2eed6305fe45fabfd6c1ac))
+    - Inline format args ([`dbc6cbb`](https://github.com/Byron/gitoxide/commit/dbc6cbb4363c2532f81b0bd6e351c4577bb9e9a3))
+    - Include license files in all crates ([`facaaf6`](https://github.com/Byron/gitoxide/commit/facaaf633f01c857dcf2572c6dbe0a92b7105c1c))
+    - Merge branch 'consecutive-negotiation' ([`97b3f7e`](https://github.com/Byron/gitoxide/commit/97b3f7e2eaddea20c98f2f7ab6a0d2e2117b0793))
+    - Various improvements to the API ([`9ab2051`](https://github.com/Byron/gitoxide/commit/9ab205102eacaf0758c143941f43831a481a1f06))
+</details>
+
+## 0.14.0 (2023-05-19)
+
+### New Features
+
+ - <csr-id-59ce4c606f8ccd9b6a16da2025e6746984d32fd6/> A Graph for quick access to commits and for associating state with them.
+   This data structure should be used whenever stateful traversal is required, usually
+   by associating information with each commit to remember what was seen and what wasn't.
+ - <csr-id-dde8c3aca545ba20cd5752f02283b98647fd3970/> A PriorityQueue that is useful for graph traversal.
+
+### New Features (BREAKING)
+
+ - <csr-id-ed258da9015d2d68734aeac485dd009760fc4da4/> `describe` usees commitgraph.
+   With it it can leverage the commitgraph data structure would would be more prominent
+   on server-side applications, presumably.
+
+### Commit Statistics
+
+<csr-read-only-do-not-edit/>
+
+ - 7 commits contributed to the release over the course of 7 calendar days.
+ - 22 days passed between releases.
+ - 3 commits were understood as [conventional](https://www.conventionalcommits.org).
+ - 0 issues like '(#ID)' were seen in commit messages
+
+### Commit Details
+
+<csr-read-only-do-not-edit/>
+
+<details><summary>view details</summary>
+
+ * **Uncategorized**
+    - Release gix-commitgraph v0.15.0, gix-revision v0.14.0, gix-negotiate v0.1.0, safety bump 7 crates ([`92832ca`](https://github.com/Byron/gitoxide/commit/92832ca2899cd2f222f4c7b1cc9e766178f55806))
+    - Merge branch 'consecutive-negotiation' ([`4507f94`](https://github.com/Byron/gitoxide/commit/4507f94984c811ea098e43472e5f54ec4dbb90c1))
+    - `describe` usees commitgraph. ([`ed258da`](https://github.com/Byron/gitoxide/commit/ed258da9015d2d68734aeac485dd009760fc4da4))
+    - A Graph for quick access to commits and for associating state with them. ([`59ce4c6`](https://github.com/Byron/gitoxide/commit/59ce4c606f8ccd9b6a16da2025e6746984d32fd6))
+    - A PriorityQueue that is useful for graph traversal. ([`dde8c3a`](https://github.com/Byron/gitoxide/commit/dde8c3aca545ba20cd5752f02283b98647fd3970))
+    - Make clear that we do handle shallow repos, refactor tests ([`fc423e4`](https://github.com/Byron/gitoxide/commit/fc423e470de50491a725d4802066d26c05bd2b2a))
+    - Release gix-object v0.29.2 ([`4f879bf`](https://github.com/Byron/gitoxide/commit/4f879bf35653bdc8f9729d524c6e8e1fb3c6886b))
+</details>
+
 ## 0.13.0 (2023-04-26)
 
 ### New Features (BREAKING)
@@ -21,7 +189,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 <csr-read-only-do-not-edit/>
 
- - 10 commits contributed to the release over the course of 14 calendar days.
+ - 11 commits contributed to the release over the course of 14 calendar days.
  - 25 days passed between releases.
  - 1 commit was understood as [conventional](https://www.conventionalcommits.org).
  - 1 unique issue was worked on: [#814](https://github.com/Byron/gitoxide/issues/814)
@@ -41,6 +209,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  * **[#814](https://github.com/Byron/gitoxide/issues/814)**
     - Rename `serde1` cargo feature to `serde` and use the weak-deps cargo capability. ([`b83ee36`](https://github.com/Byron/gitoxide/commit/b83ee366a3c65c717beb587ad809268f1c54b8ad))
  * **Uncategorized**
+    - Release gix-index v0.16.0, gix-mailmap v0.12.0, gix-pack v0.34.0, gix-odb v0.44.0, gix-packetline v0.16.0, gix-transport v0.30.0, gix-protocol v0.31.0, gix-revision v0.13.0, gix-refspec v0.10.0, gix-worktree v0.16.0, gix v0.44.0 ([`d7173b2`](https://github.com/Byron/gitoxide/commit/d7173b2d2cb79685fdf7f618c31c576db24fa648))
     - Release gix-index v0.16.0, gix-mailmap v0.12.0, gix-pack v0.34.0, gix-odb v0.44.0, gix-packetline v0.16.0, gix-transport v0.30.0, gix-protocol v0.31.0, gix-revision v0.13.0, gix-refspec v0.10.0, gix-worktree v0.16.0, gix v0.44.0 ([`e4df557`](https://github.com/Byron/gitoxide/commit/e4df5574c0813a0236319fa6e8b3b41bab179fc8))
     - Release gix-hash v0.11.1, gix-path v0.7.4, gix-glob v0.6.0, gix-attributes v0.11.0, gix-config-value v0.11.0, gix-fs v0.1.1, gix-tempfile v5.0.3, gix-utils v0.1.1, gix-lock v5.0.1, gix-object v0.29.1, gix-ref v0.28.0, gix-sec v0.7.0, gix-config v0.21.0, gix-prompt v0.4.0, gix-url v0.17.0, gix-credentials v0.13.0, gix-diff v0.29.0, gix-discover v0.17.0, gix-hashtable v0.2.0, gix-ignore v0.1.0, gix-bitmap v0.2.3, gix-traverse v0.25.0, gix-index v0.16.0, gix-mailmap v0.12.0, gix-pack v0.34.0, gix-odb v0.44.0, gix-packetline v0.16.0, gix-transport v0.30.0, gix-protocol v0.31.0, gix-revision v0.13.0, gix-refspec v0.10.0, gix-worktree v0.16.0, gix v0.44.0, safety bump 7 crates ([`91134a1`](https://github.com/Byron/gitoxide/commit/91134a11c8ba0e942f692488ec9bce9fa1086324))
     - Prepare changelogs prior to release ([`30a1a71`](https://github.com/Byron/gitoxide/commit/30a1a71f36f24faac0e0b362ffdfedea7f9cdbf1))
diff --git a/vendor/gix-revision/Cargo.toml b/vendor/gix-revision/Cargo.toml
index d8a43419f..92db8e065 100644
--- a/vendor/gix-revision/Cargo.toml
+++ b/vendor/gix-revision/Cargo.toml
@@ -13,14 +13,14 @@
 edition = "2021"
 rust-version = "1.64"
 name = "gix-revision"
-version = "0.13.0"
+version = "0.15.2"
 authors = ["Sebastian Thiel <sebastian.thiel@icloud.com>"]
 include = [
     "src/**/*",
+    "LICENSE-*",
     "CHANGELOG.md",
     "README.md",
 ]
-autotests = false
 description = "A WIP crate of the gitoxide project dealing with finding names for revisions and parsing specifications"
 readme = "README.md"
 license = "MIT/Apache-2.0"
@@ -47,16 +47,19 @@ version = "0.2.1"
 optional = true
 
 [dependencies.gix-date]
-version = "^0.5.0"
+version = "^0.5.1"
 
 [dependencies.gix-hash]
-version = "^0.11.1"
+version = "^0.11.2"
 
 [dependencies.gix-hashtable]
-version = "^0.2.0"
+version = "^0.2.1"
 
 [dependencies.gix-object]
-version = "^0.29.1"
+version = "^0.30.0"
+
+[dependencies.gix-revwalk]
+version = "^0.1.0"
 
 [dependencies.serde]
 version = "1.0.114"
@@ -67,6 +70,8 @@ default-features = false
 [dependencies.thiserror]
 version = "1.0.26"
 
+[dev-dependencies]
+
 [features]
 serde = [
     "dep:serde",
diff --git a/vendor/gix-revision/LICENSE-APACHE b/vendor/gix-revision/LICENSE-APACHE
new file mode 100644
index 000000000..a51f59a06
--- /dev/null
+++ b/vendor/gix-revision/LICENSE-APACHE
@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
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+      designated in writing by the copyright owner as "Not a Contribution."
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+      on behalf of whom a Contribution has been received by Licensor and
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+      meet the following conditions:
+
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+          Derivative Works a copy of this License; and
+
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+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          as part of the Derivative Works; within the Source form or
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+          notices within Derivative Works that You distribute, alongside
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+          that such additional attribution notices cannot be construed
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2018-2021 Sebastian Thiel, and [contributors](https://github.com/byron/gitoxide/contributors)
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/gix-revision/LICENSE-MIT b/vendor/gix-revision/LICENSE-MIT
new file mode 100644
index 000000000..b58e818f1
--- /dev/null
+++ b/vendor/gix-revision/LICENSE-MIT
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018-2021 Sebastian Thiel, and [contributors](https://github.com/byron/gitoxide/contributors).
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/vendor/gix-revision/src/describe.rs b/vendor/gix-revision/src/describe.rs
index 55cc3deef..2c1636477 100644
--- a/vendor/gix-revision/src/describe.rs
+++ b/vendor/gix-revision/src/describe.rs
@@ -94,7 +94,8 @@ impl<'a> Display for Format<'a> {
     }
 }
 
-type Flags = u32;
+/// A bit-field which keeps track of which commit is reachable by one of 32 candidates names.
+pub type Flags = u32;
 const MAX_CANDIDATES: usize = std::mem::size_of::<Flags>() * 8;
 
 /// The options required to call [`describe()`][function::describe()].
@@ -129,14 +130,11 @@ impl<'name> Default for Options<'name> {
 /// The error returned by the [`describe()`][function::describe()] function.
 #[derive(Debug, thiserror::Error)]
 #[allow(missing_docs)]
-pub enum Error<E>
-where
-    E: std::error::Error + Send + Sync + 'static,
-{
-    #[error("Commit {} could not be found during graph traversal", .oid.to_hex())]
-    Find {
+pub enum Error {
+    #[error("The parents of commit {} could not be added to graph during traversal", oid.to_hex())]
+    InsertParentsToGraph {
         #[source]
-        err: Option<E>,
+        err: crate::graph::insert_parents::Error,
         oid: gix_hash::ObjectId,
     },
     #[error("A commit could not be decoded during traversal")]
@@ -144,35 +142,32 @@ where
 }
 
 pub(crate) mod function {
-    use std::{borrow::Cow, cmp::Ordering, collections::VecDeque, iter::FromIterator};
+    use std::{borrow::Cow, cmp::Ordering};
 
     use bstr::BStr;
     use gix_hash::oid;
-    use gix_hashtable::{hash_map, HashMap};
-    use gix_object::CommitRefIter;
 
     use super::{Error, Outcome};
-    use crate::describe::{Flags, Options, MAX_CANDIDATES};
+    use crate::{
+        describe::{CommitTime, Flags, Options, MAX_CANDIDATES},
+        Graph, PriorityQueue,
+    };
 
-    /// Given a `commit` id, traverse the commit graph and collect candidate names from the `name_by_oid` mapping to produce
+    /// Given a `commit` id, traverse the commit `graph` and collect candidate names from the `name_by_oid` mapping to produce
     /// an `Outcome`, which converted [`into_format()`][Outcome::into_format()] will produce a typical `git describe` string.
     ///
     /// Note that the `name_by_oid` map is returned in the [`Outcome`], which can be forcefully returned even if there was no matching
     /// candidate by setting `fallback_to_oid` to true.
-    pub fn describe<'name, Find, E>(
+    pub fn describe<'name>(
         commit: &oid,
-        mut find: Find,
+        graph: &mut Graph<'_, Flags>,
         Options {
             name_by_oid,
             mut max_candidates,
             fallback_to_oid,
             first_parent,
         }: Options<'name>,
-    ) -> Result<Option<Outcome<'name>>, Error<E>>
-    where
-        Find: for<'b> FnMut(&oid, &'b mut Vec<u8>) -> Result<Option<CommitRefIter<'b>>, E>,
-        E: std::error::Error + Send + Sync + 'static,
-    {
+    ) -> Result<Option<Outcome<'name>>, Error> {
         max_candidates = max_candidates.min(MAX_CANDIDATES);
         if let Some(name) = name_by_oid.get(commit) {
             return Ok(Some(Outcome {
@@ -198,19 +193,16 @@ pub(crate) mod function {
             };
         }
 
-        let mut buf = Vec::new();
-        let mut parent_buf = Vec::new();
-
-        let mut queue = VecDeque::from_iter(Some((commit.to_owned(), u32::MAX)));
+        let mut queue = PriorityQueue::from_iter(Some((u32::MAX, commit.to_owned())));
         let mut candidates = Vec::new();
         let mut commits_seen = 0;
         let mut gave_up_on_commit = None;
-        let mut seen = HashMap::<gix_hash::ObjectId, Flags>::default();
-        seen.insert(commit.to_owned(), 0u32);
+        graph.clear();
+        graph.insert(commit.to_owned(), 0u32);
 
-        while let Some((commit, _commit_time)) = queue.pop_front() {
+        while let Some(commit) = queue.pop_value() {
             commits_seen += 1;
-            if let Some(name) = name_by_oid.get(&commit) {
+            let flags = if let Some(name) = name_by_oid.get(&commit) {
                 if candidates.len() < max_candidates {
                     let identity_bit = 1 << candidates.len();
                     candidates.push(Candidate {
@@ -219,14 +211,17 @@ pub(crate) mod function {
                         identity_bit,
                         order: candidates.len(),
                     });
-                    *seen.get_mut(&commit).expect("inserted") |= identity_bit;
+                    let flags = graph.get_mut(&commit).expect("inserted");
+                    *flags |= identity_bit;
+                    *flags
                 } else {
                     gave_up_on_commit = Some(commit);
                     break;
                 }
-            }
+            } else {
+                graph[&commit]
+            };
 
-            let flags = seen[&commit];
             for candidate in candidates
                 .iter_mut()
                 .filter(|c| (flags & c.identity_bit) != c.identity_bit)
@@ -257,16 +252,7 @@ pub(crate) mod function {
                 }
             }
 
-            parents_by_date_onto_queue_and_track_names(
-                &mut find,
-                &mut buf,
-                &mut parent_buf,
-                &mut queue,
-                &mut seen,
-                &commit,
-                flags,
-                first_parent,
-            )?;
+            parents_by_date_onto_queue_and_track_names(graph, &mut queue, commit, flags, first_parent)?;
         }
 
         if candidates.is_empty() {
@@ -290,17 +276,14 @@ pub(crate) mod function {
         });
 
         if let Some(commit_id) = gave_up_on_commit {
-            queue.push_front((commit_id, u32::MAX));
+            queue.insert(u32::MAX, commit_id);
             commits_seen -= 1;
         }
 
         commits_seen += finish_depth_computation(
             queue,
-            find,
+            graph,
             candidates.first_mut().expect("at least one candidate"),
-            seen,
-            buf,
-            parent_buf,
             first_parent,
         )?;
 
@@ -313,91 +296,41 @@ pub(crate) mod function {
         }))
     }
 
-    #[allow(clippy::too_many_arguments)]
-    fn parents_by_date_onto_queue_and_track_names<Find, E>(
-        find: &mut Find,
-        buf: &mut Vec<u8>,
-        parent_buf: &mut Vec<u8>,
-        queue: &mut VecDeque<(gix_hash::ObjectId, u32)>,
-        seen: &mut HashMap<gix_hash::ObjectId, Flags>,
-        commit: &gix_hash::oid,
+    fn parents_by_date_onto_queue_and_track_names(
+        graph: &mut Graph<'_, Flags>,
+        queue: &mut PriorityQueue<CommitTime, gix_hash::ObjectId>,
+        commit: gix_hash::ObjectId,
         commit_flags: Flags,
         first_parent: bool,
-    ) -> Result<(), Error<E>>
-    where
-        Find: for<'b> FnMut(&oid, &'b mut Vec<u8>) -> Result<Option<CommitRefIter<'b>>, E>,
-        E: std::error::Error + Send + Sync + 'static,
-    {
-        let commit_iter = find(commit, buf)
-            .map_err(|err| Error::Find {
-                err: Some(err),
-                oid: commit.to_owned(),
-            })?
-            .ok_or_else(|| Error::Find {
-                err: None,
-                oid: commit.to_owned(),
-            })?;
-        for token in commit_iter {
-            match token {
-                Ok(gix_object::commit::ref_iter::Token::Tree { .. }) => continue,
-                Ok(gix_object::commit::ref_iter::Token::Parent { id: parent_id }) => match seen.entry(parent_id) {
-                    hash_map::Entry::Vacant(entry) => {
-                        let parent = match find(&parent_id, parent_buf).map_err(|err| Error::Find {
-                            err: Some(err),
-                            oid: commit.to_owned(),
-                        })? {
-                            Some(p) => p,
-                            None => continue, // skip missing objects, they don't exist.
-                        };
-
-                        let parent_commit_date = parent
-                            .committer()
-                            .map(|committer| committer.time.seconds_since_unix_epoch)
-                            .unwrap_or_default();
-
-                        entry.insert(commit_flags);
-                        match queue.binary_search_by(|c| c.1.cmp(&parent_commit_date).reverse()) {
-                            Ok(_) => queue.push_back((parent_id, parent_commit_date)),
-                            Err(pos) => queue.insert(pos, (parent_id, parent_commit_date)),
-                        };
-                    }
-                    hash_map::Entry::Occupied(mut entry) => {
-                        *entry.get_mut() |= commit_flags;
-                    }
+    ) -> Result<(), Error> {
+        graph
+            .insert_parents(
+                &commit,
+                |parent_id, parent_commit_date| {
+                    queue.insert(parent_commit_date as u32, parent_id);
+                    commit_flags
                 },
-                Ok(_unused_token) => break,
-                Err(err) => return Err(err.into()),
-            }
-            if first_parent {
-                break;
-            }
-        }
-
+                |_parent_id, flags| *flags |= commit_flags,
+                first_parent,
+            )
+            .map_err(|err| Error::InsertParentsToGraph { err, oid: commit })?;
         Ok(())
     }
 
-    #[allow(clippy::too_many_arguments)]
-    fn finish_depth_computation<'name, Find, E>(
-        mut queue: VecDeque<(gix_hash::ObjectId, u32)>,
-        mut find: Find,
-        best_candidate: &mut Candidate<'name>,
-        mut seen: HashMap<gix_hash::ObjectId, Flags>,
-        mut buf: Vec<u8>,
-        mut parent_buf: Vec<u8>,
+    fn finish_depth_computation(
+        mut queue: PriorityQueue<CommitTime, gix_hash::ObjectId>,
+        graph: &mut Graph<'_, Flags>,
+        best_candidate: &mut Candidate<'_>,
         first_parent: bool,
-    ) -> Result<u32, Error<E>>
-    where
-        Find: for<'b> FnMut(&oid, &'b mut Vec<u8>) -> Result<Option<CommitRefIter<'b>>, E>,
-        E: std::error::Error + Send + Sync + 'static,
-    {
+    ) -> Result<u32, Error> {
         let mut commits_seen = 0;
-        while let Some((commit, _commit_time)) = queue.pop_front() {
+        while let Some(commit) = queue.pop_value() {
             commits_seen += 1;
-            let flags = seen[&commit];
+            let flags = graph[&commit];
             if (flags & best_candidate.identity_bit) == best_candidate.identity_bit {
                 if queue
-                    .iter()
-                    .all(|(id, _)| (seen[id] & best_candidate.identity_bit) == best_candidate.identity_bit)
+                    .iter_unordered()
+                    .all(|id| (graph[id] & best_candidate.identity_bit) == best_candidate.identity_bit)
                 {
                     break;
                 }
@@ -405,16 +338,7 @@ pub(crate) mod function {
                 best_candidate.commits_in_its_future += 1;
             }
 
-            parents_by_date_onto_queue_and_track_names(
-                &mut find,
-                &mut buf,
-                &mut parent_buf,
-                &mut queue,
-                &mut seen,
-                &commit,
-                flags,
-                first_parent,
-            )?;
+            parents_by_date_onto_queue_and_track_names(graph, &mut queue, commit, flags, first_parent)?;
         }
         Ok(commits_seen)
     }
@@ -429,3 +353,6 @@ pub(crate) mod function {
         order: usize,
     }
 }
+
+/// The timestamp for the creation date of a commit in seconds since unix epoch.
+type CommitTime = u32;
diff --git a/vendor/gix-revision/src/lib.rs b/vendor/gix-revision/src/lib.rs
index ef273b5ae..31d22768c 100644
--- a/vendor/gix-revision/src/lib.rs
+++ b/vendor/gix-revision/src/lib.rs
@@ -14,6 +14,6 @@ pub use describe::function::describe;
 
 ///
 pub mod spec;
+pub use spec::types::Spec;
 
-mod types;
-pub use types::Spec;
+pub use gix_revwalk::{graph, Graph, PriorityQueue};
diff --git a/vendor/gix-revision/src/spec/mod.rs b/vendor/gix-revision/src/spec/mod.rs
index c2df7bc1e..616ad3a26 100644
--- a/vendor/gix-revision/src/spec/mod.rs
+++ b/vendor/gix-revision/src/spec/mod.rs
@@ -53,6 +53,57 @@ mod _impls {
     }
 }
 
+pub(crate) mod types {
+    /// A revision specification without any bindings to a repository, useful for serialization or movement over thread boundaries.
+    ///
+    /// Note that all [object ids][gix_hash::ObjectId] should be a committish, but don't have to be.
+    /// Unless the field name contains `_exclusive`, the respective objects are included in the set.
+    #[derive(Copy, Clone, Debug, Ord, PartialOrd, Eq, PartialEq, Hash)]
+    #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+    pub enum Spec {
+        /// Include commits reachable from this revision, i.e. `a` and its ancestors.
+        ///
+        /// The equivalent to [crate::spec::Kind::IncludeReachable], but with data.
+        Include(gix_hash::ObjectId),
+        /// Exclude commits reachable from this revision, i.e. `a` and its ancestors. Example: `^a`.
+        ///
+        /// The equivalent to [crate::spec::Kind::ExcludeReachable], but with data.
+        Exclude(gix_hash::ObjectId),
+        /// Every commit that is reachable from `from` to `to`, but not any ancestors of `from`. Example: `from..to`.
+        ///
+        /// The equivalent to [crate::spec::Kind::RangeBetween], but with data.
+        Range {
+            /// The starting point of the range, which is included in the set.
+            from: gix_hash::ObjectId,
+            /// The end point of the range, which is included in the set.
+            to: gix_hash::ObjectId,
+        },
+        /// Every commit reachable through either `theirs` or `ours`, but no commit that is reachable by both. Example: `theirs...ours`.
+        ///
+        /// The equivalent to [crate::spec::Kind::ReachableToMergeBase], but with data.
+        Merge {
+            /// Their side of the merge, which is included in the set.
+            theirs: gix_hash::ObjectId,
+            /// Our side of the merge, which is included in the set.
+            ours: gix_hash::ObjectId,
+        },
+        /// Include every commit of all parents of `a`, but not `a` itself. Example: `a^@`.
+        ///
+        /// The equivalent to [crate::spec::Kind::IncludeReachableFromParents], but with data.
+        IncludeOnlyParents(
+            /// Include only the parents of this object, but not the object itself.
+            gix_hash::ObjectId,
+        ),
+        /// Exclude every commit of all parents of `a`, but not `a` itself. Example: `a^!`.
+        ///
+        /// The equivalent to [crate::spec::Kind::ExcludeReachableFromParents], but with data.
+        ExcludeParents(
+            /// Exclude the parents of this object, but not the object itself.
+            gix_hash::ObjectId,
+        ),
+    }
+}
+
 ///
 pub mod parse;
 pub use parse::function::parse;
diff --git a/vendor/gix-revision/src/spec/parse/function.rs b/vendor/gix-revision/src/spec/parse/function.rs
index 94fb4ee5d..8a89f8f68 100644
--- a/vendor/gix-revision/src/spec/parse/function.rs
+++ b/vendor/gix-revision/src/spec/parse/function.rs
@@ -213,7 +213,7 @@ fn long_describe_prefix(name: &BStr) -> Option<(&BStr, delegate::PrefixHint<'_>)
         .and_then(|generation| {
             iter.next().map(|token| {
                 let last_token_len = token.len();
-                let first_token_ptr = iter.last().map(|token| token.as_ptr()).unwrap_or(token.as_ptr());
+                let first_token_ptr = iter.last().map_or(token.as_ptr(), |token| token.as_ptr());
                 // SAFETY: both pointers are definitely part of the same object
                 #[allow(unsafe_code)]
                 let prior_tokens_len: usize = unsafe { token.as_ptr().offset_from(first_token_ptr) }
@@ -413,7 +413,7 @@ where
 
     input = {
         if let Some(b'@') = sep {
-            let past_sep = input[sep_pos.map(|pos| pos + 1).unwrap_or(input.len())..].as_bstr();
+            let past_sep = input[sep_pos.map_or(input.len(), |pos| pos + 1)..].as_bstr();
             let (nav, rest, _consumed) = parens(past_sep)?.ok_or_else(|| Error::AtNeedsCurlyBrackets {
                 input: input[sep_pos.unwrap_or(input.len())..].into(),
             })?;
diff --git a/vendor/gix-revision/src/types.rs b/vendor/gix-revision/src/types.rs
deleted file mode 100644
index 374d43e20..000000000
--- a/vendor/gix-revision/src/types.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-/// A revision specification without any bindings to a repository, useful for serialization or movement over thread boundaries.
-///
-/// Note that all [object ids][gix_hash::ObjectId] should be a committish, but don't have to be.
-/// Unless the field name contains `_exclusive`, the respective objects are included in the set.
-#[derive(Copy, Clone, Debug, Ord, PartialOrd, Eq, PartialEq, Hash)]
-#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-pub enum Spec {
-    /// Include commits reachable from this revision, i.e. `a` and its ancestors.
-    ///
-    /// The equivalent to [crate::spec::Kind::IncludeReachable], but with data.
-    Include(gix_hash::ObjectId),
-    /// Exclude commits reachable from this revision, i.e. `a` and its ancestors. Example: `^a`.
-    ///
-    /// The equivalent to [crate::spec::Kind::ExcludeReachable], but with data.
-    Exclude(gix_hash::ObjectId),
-    /// Every commit that is reachable from `from` to `to`, but not any ancestors of `from`. Example: `from..to`.
-    ///
-    /// The equivalent to [crate::spec::Kind::RangeBetween], but with data.
-    Range {
-        /// The starting point of the range, which is included in the set.
-        from: gix_hash::ObjectId,
-        /// The end point of the range, which is included in the set.
-        to: gix_hash::ObjectId,
-    },
-    /// Every commit reachable through either `theirs` or `ours`, but no commit that is reachable by both. Example: `theirs...ours`.
-    ///
-    /// The equivalent to [crate::spec::Kind::ReachableToMergeBase], but with data.
-    Merge {
-        /// Their side of the merge, which is included in the set.
-        theirs: gix_hash::ObjectId,
-        /// Our side of the merge, which is included in the set.
-        ours: gix_hash::ObjectId,
-    },
-    /// Include every commit of all parents of `a`, but not `a` itself. Example: `a^@`.
-    ///
-    /// The equivalent to [crate::spec::Kind::IncludeReachableFromParents], but with data.
-    IncludeOnlyParents(
-        /// Include only the parents of this object, but not the object itself.
-        gix_hash::ObjectId,
-    ),
-    /// Exclude every commit of all parents of `a`, but not `a` itself. Example: `a^!`.
-    ///
-    /// The equivalent to [crate::spec::Kind::ExcludeReachableFromParents], but with data.
-    ExcludeParents(
-        /// Exclude the parents of this object, but not the object itself.
-        gix_hash::ObjectId,
-    ),
-}