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-rw-r--r--.github/dependabot.yml15
-rw-r--r--.github/workflows/ci.yaml76
-rw-r--r--.github/workflows/clippy.yaml51
-rw-r--r--.github/workflows/update-flake.yaml30
-rw-r--r--.gitignore107
-rw-r--r--.rustfmt.toml1
-rw-r--r--Cargo.lock1607
-rw-r--r--Cargo.toml47
-rw-r--r--LICENSE373
-rw-r--r--README.md83
-rw-r--r--build.rs25
-rw-r--r--flake.lock43
-rw-r--r--flake.nix213
-rw-r--r--src/cli.rs26
-rw-r--r--src/command.rs123
-rw-r--r--src/http.rs77
-rw-r--r--src/main.rs34
-rw-r--r--src/nix.rs153
18 files changed, 3084 insertions, 0 deletions
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..eea0a9b
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,15 @@
+version: 2
+updates:
+ - package-ecosystem: "github-actions"
+ directory: "/"
+ schedule:
+ interval: "weekly"
+ commit-message:
+ prefix: "ci"
+
+ - package-ecosystem: "cargo"
+ directory: "/"
+ schedule:
+ interval: "weekly"
+ commit-message:
+ prefix: "chore(crates)"
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..b2d5df4
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,76 @@
+name: CI
+
+on:
+ push:
+ branches: [main]
+ paths:
+ - "**.lock"
+ - "**.rs"
+ - "**.nix"
+ - "Cargo.toml"
+ - ".github/workflows/ci.yaml"
+ pull_request:
+ paths:
+ - "**.lock"
+ - "**.rs"
+ - "**.nix"
+ - "Cargo.toml"
+ - ".github/workflows/ci.yaml"
+ workflow_dispatch:
+
+jobs:
+ build:
+ name: Build
+
+ strategy:
+ fail-fast: false
+ matrix:
+ os: [ubuntu-latest, macos-latest]
+
+ runs-on: ${{ matrix.os }}
+
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v4
+
+ - name: Install Nix
+ uses: DeterminateSystems/nix-installer-action@v14
+
+ - name: Setup Nix cache
+ uses: DeterminateSystems/magic-nix-cache-action@v8
+
+ - name: Run build
+ run: |
+ nix build --print-build-logs .#check-version-test
+
+ format:
+ name: Formatting
+
+ runs-on: ubuntu-latest
+
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v4
+
+ - name: Install Nix
+ uses: DeterminateSystems/nix-installer-action@v14
+
+ - name: Setup Nix cache
+ uses: DeterminateSystems/magic-nix-cache-action@v8
+
+ - name: Run flake checks
+ run: |
+ nix build --print-build-logs .#check-formatting
+
+ release-gate:
+ name: CI Release gate
+ needs: [build, format]
+
+ if: ${{ always() }}
+
+ runs-on: ubuntu-latest
+
+ steps:
+ - name: Exit with error
+ if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
+ run: exit 1
diff --git a/.github/workflows/clippy.yaml b/.github/workflows/clippy.yaml
new file mode 100644
index 0000000..32668a8
--- /dev/null
+++ b/.github/workflows/clippy.yaml
@@ -0,0 +1,51 @@
+name: Clippy
+
+on:
+ push:
+ branches: [main]
+ paths:
+ - "**.lock"
+ - "**.rs"
+ - "**.nix"
+ - "Cargo.toml"
+ - ".github/workflows/clippy.yaml"
+ pull_request:
+ paths:
+ - "**.lock"
+ - "**.rs"
+ - "**.nix"
+ - "Cargo.toml"
+ - ".github/workflows/clippy.yaml"
+ workflow_dispatch:
+
+jobs:
+ clippy:
+ name: Run scan
+
+ runs-on: ubuntu-latest
+
+ permissions:
+ security-events: write
+
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v4
+
+ - name: Install Nix
+ uses: DeterminateSystems/nix-installer-action@v14
+
+ - name: Setup Nix cache
+ uses: DeterminateSystems/magic-nix-cache-action@v8
+
+ - name: Run clippy
+ id: clippy-run
+ run: |
+ nix build --print-build-logs .#check-clippy
+ [ -L result ] || exit 1
+ echo "sarif-file=$(readlink -f result)" >> "$GITHUB_OUTPUT"
+
+ - name: Upload results
+ uses: github/codeql-action/upload-sarif@v3
+ with:
+ sarif_file: ${{ steps.clippy-run.outputs.sarif-file }}
+ wait-for-processing: true
diff --git a/.github/workflows/update-flake.yaml b/.github/workflows/update-flake.yaml
new file mode 100644
index 0000000..02e4d3b
--- /dev/null
+++ b/.github/workflows/update-flake.yaml
@@ -0,0 +1,30 @@
+name: flake.lock
+
+on:
+ schedule:
+ # run every saturday
+ - cron: "0 0 * * 6"
+ workflow_dispatch:
+
+jobs:
+ update:
+ name: Update & make PR
+
+ runs-on: ubuntu-latest
+
+ permissions:
+ contents: write
+ pull-requests: write
+
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v4
+
+ - name: Install Nix
+ uses: DeterminateSystems/nix-installer-action@v14
+
+ - uses: DeterminateSystems/update-flake-lock@v24
+ with:
+ commit-msg: "chore(nix): update flake.lock"
+ pr-title: "chore(nix): update flake.lock"
+ token: ${{ github.token }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..59ad0be
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,107 @@
+### https://raw.github.com/github/gitignore/8779ee73af62c669e7ca371aaab8399d87127693/Rust.gitignore
+
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+# Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# RustRover
+# JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+# be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+# and can be added to the global gitignore or merged into this file. For a more nuclear
+# option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+
+### Nix
+
+result
+result-*
+repl-result-*
+
+
+### https://raw.github.com/github/gitignore/8779ee73af62c669e7ca371aaab8399d87127693/Global/Linux.gitignore
+
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+
+### https://raw.github.com/github/gitignore/8779ee73af62c669e7ca371aaab8399d87127693/Global/macOS.gitignore
+
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+
+### https://raw.github.com/github/gitignore/8779ee73af62c669e7ca371aaab8399d87127693/Global/Windows.gitignore
+
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+
diff --git a/.rustfmt.toml b/.rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/.rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..bb6c5a9
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1607 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "addr2line"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "anstream"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
+
+[[package]]
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+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a"
+dependencies = [
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
+dependencies = [
+ "anstyle",
+ "windows-sys 0.52.0",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10f00e1f6e58a40e807377c75c6a7f97bf9044fab57816f2414e6f5f4499d7b8"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
+[[package]]
+name = "autocfg"
+version = "1.3.0"
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+checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
+
+[[package]]
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+checksum = "26b05800d2e817c8b3b4b54abd461726265fa9789ae34330622f2db9ee696f9d"
+dependencies = [
+ "addr2line",
+ "cc",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+
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+
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+ "futures-util",
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+
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "zerocopy"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
+dependencies = [
+ "byteorder",
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..94822e1
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,47 @@
+[package]
+name = "nix-forecast"
+version = "0.1.0"
+authors = [ "Seth <getchoo at tuta dot io>", "nix-forecast Contributors" ]
+edition = "2021"
+description = "Check the forecast for today's Nix builds"
+readme = "README.md"
+repository = "https://github.com/getchoo/nix-forecast"
+license = "MPL-2.0"
+keywords = ["nix"]
+categories = ["command-line-utilities"]
+build = "build.rs"
+
+[dependencies]
+anyhow = "1.0"
+clap = { version = "4.5", features = ["derive"] }
+futures = "0.3"
+indicatif = "0.17"
+num_cpus = "1.16"
+reqwest = { version = "0.12", default-features = false, features = [
+ "charset",
+ "http2",
+ "macos-system-configuration",
+ "rustls-tls"
+] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+thiserror = "1.0"
+tokio = { version = "1.40", features = ["macros", "rt-multi-thread"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3" }
+
+[build-dependencies]
+clap = { version = "4.5", features = ["derive"] }
+clap_complete = "4.5"
+
+[lints.clippy]
+cargo = "warn"
+complexity = "warn"
+correctness = "deny"
+pedantic = "warn"
+perf = "warn"
+style = "warn"
+suspicious = "deny"
+
+[lints.rust]
+unsafe_code = "forbid"
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..14e2f77
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,373 @@
+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/README.md b/README.md
new file mode 100644
index 0000000..380e01f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,83 @@
+# nix-forecast
+
+Check the forecast for today's Nix builds with a blazingly fast (šŸš€šŸ”„šŸ¦€) CLI
+
+## Usage
+
+```
+Check the forecast for today's Nix builds
+
+Usage: nix-forecast [OPTIONS] [INSTALLABLES]...
+
+Arguments:
+ [INSTALLABLES]... A list of Nix installables to look for. If not given, all paths in nixpkgs are checked
+
+Options:
+ -c, --configuration <CONFIGURATION> Flake reference pointing to a NixOS or nix-darwin configuration
+ -b, --binary-cache <BINARY_CACHE> URL of the substituter to check [default: https://cache.nixos.org]
+ -f, --flake <FLAKE> Flake reference of nixpkgs (or other package repository) [default: nixpkgs]
+ -s, --show-missing Show a list of store paths not found in the substituter
+ -h, --help Print help
+ -V, --version Print version
+```
+
+## Examples
+
+### Flake installables
+
+```sh
+nix-forecast nixpkgs#{hello,gcc,clang,nrr}
+```
+
+### NixOS configuration
+
+
+```sh
+nix-forecast .#nixosConfigurations.myMachine
+```
+
+### nix-darwin configuration
+
+```sh
+nix-forecast .#darwinConfigurations.myMac
+```
+
+## Why?
+
+Finding out if paths are cached can be a bit troublesome in Nix, with commands like `nix build --dry-run`
+being the only solution a lot of the time. Meanwhile in the world of [Guix](https://guix.gnu.org/), they have
+had the `guix weather` command to do this for ages! This project aims to bring the power of that command right
+to Nix
+
+### What about `nix-weather`?
+
+`nix-weather` is another project with a similar goal of bringing some of the features of `guix weather` to
+Nix. However, it does introduce it's own spin on things and has much more of a focus on NixOS configurations.
+In contrast, `nix-forecast` aims to be as close to the Guix command as possible, while also introducing more
+generic support for [Flake](https://nix.dev/concepts/flakes) references, NixOS *and* nix-darwin
+configurations, better error messages, and a (subjectively) more comfortable interface
+
+I've also made it slightly faster :p
+
+```
+$ hyperfine --warmup 1 './result/bin/nix-weather --name glados --config ~/flake' './target/release/nix-forecast --configuration ~/flake#nixosConfigurations.glados'
+Benchmark 1: ./result/bin/nix-weather --name glados --config ~/flake
+ Time (mean Ā± Ļƒ): 11.387 s Ā± 0.646 s [User: 3.422 s, System: 1.663 s]
+ Range (min ā€¦ max): 10.490 s ā€¦ 12.569 s 10 runs
+
+Benchmark 2: ./target/release/nix-forecast --configuration ~/flake#nixosConfigurations.glados
+ Time (mean Ā± Ļƒ): 6.395 s Ā± 0.229 s [User: 0.992 s, System: 0.967 s]
+ Range (min ā€¦ max): 6.231 s ā€¦ 7.030 s 10 runs
+
+ Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs. It might help to use the '--warmup' or '--prepare' options.
+
+Summary
+ ./target/release/nix-forecast --configuration ~/flake#nixosConfigurations.glados ran
+ 1.78 Ā± 0.12 times faster than ./result/bin/nix-weather --name glados --config ~/flake
+```
+
+## Inspired by...
+
+- [guix weather](https://guix.gnu.org/manual/en/html_node/Invoking-guix-weather.html)
+- [nix-weather](https://github.com/cafkafk/nix-weather/)
+- [My much slower version in Fish](https://discourse.nixos.org/t/how-to-find-uncached-dependencies-of-a-closure/45385)
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..4d84adc
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,25 @@
+use std::io::Error;
+
+use clap::{CommandFactory, ValueEnum};
+use clap_complete::{generate_to, Shell};
+
+include!("src/cli.rs");
+
+fn main() -> Result<(), Error> {
+ let out_dir = if let Some(completion_dir) = option_env!("COMPLETION_DIR") {
+ std::fs::create_dir_all(completion_dir)?;
+ completion_dir.to_string()
+ } else if let Ok(out_dir) = std::env::var("OUT_DIR") {
+ out_dir
+ } else {
+ println!("cargo:warning=Unable to resolve `COMPLETION_DIR` or `OUT_DIR` in environment. Completions will not be built");
+ return Ok(());
+ };
+
+ let mut command = Cli::command();
+ for &shell in Shell::value_variants() {
+ generate_to(shell, &mut command, env!("CARGO_PKG_NAME"), &out_dir)?;
+ }
+
+ Ok(())
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..d1142e0
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,43 @@
+{
+ "nodes": {
+ "nix-filter": {
+ "locked": {
+ "lastModified": 1710156097,
+ "narHash": "sha256-1Wvk8UP7PXdf8bCCaEoMnOT1qe5/Duqgj+rL8sRQsSM=",
+ "owner": "numtide",
+ "repo": "nix-filter",
+ "rev": "3342559a24e85fc164b295c3444e8a139924675b",
+ "type": "github"
+ },
+ "original": {
+ "owner": "numtide",
+ "repo": "nix-filter",
+ "type": "github"
+ }
+ },
+ "nixpkgs": {
+ "locked": {
+ "lastModified": 1726142289,
+ "narHash": "sha256-Jks8O42La+nm5AMTSq/PvM5O+fUAhIy0Ce1QYqLkyZ4=",
+ "owner": "NixOS",
+ "repo": "nixpkgs",
+ "rev": "280db3decab4cbeb22a4599bd472229ab74d25e1",
+ "type": "github"
+ },
+ "original": {
+ "owner": "NixOS",
+ "ref": "nixpkgs-unstable",
+ "repo": "nixpkgs",
+ "type": "github"
+ }
+ },
+ "root": {
+ "inputs": {
+ "nix-filter": "nix-filter",
+ "nixpkgs": "nixpkgs"
+ }
+ }
+ },
+ "root": "root",
+ "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..b8d9d24
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,213 @@
+{
+ description = "Check the forecast for today's Nix builds";
+
+ inputs = {
+ nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+ nix-filter.url = "github:numtide/nix-filter";
+ };
+
+ outputs =
+ {
+ self,
+ nixpkgs,
+ nix-filter,
+ }:
+ let
+ inherit (nixpkgs) lib;
+
+ # We want to generate outputs for as many systems as possible,
+ # even if we don't officially support or test for them
+ allSystems = lib.systems.flakeExposed;
+
+ # These are the systems we do officially support and test, though
+ supportedSystems = [
+ "x86_64-linux"
+ "aarch64-linux"
+ "x86_64-darwin"
+ "aarch64-darwin"
+ ];
+
+ forAllSystems = lib.genAttrs allSystems;
+ nixpkgsFor = forAllSystems (system: nixpkgs.legacyPackages.${system});
+ in
+ {
+ checks = forAllSystems (
+ system:
+ let
+ pkgs = nixpkgsFor.${system};
+ packages = self.packages.${system};
+ in
+ lib.optionalAttrs (lib.elem system supportedSystems) {
+ version-test = packages.nix-forecast.tests.version;
+
+ clippy = packages.nix-forecast.overrideAttrs (oldAttrs: {
+ pname = "check-clippy";
+
+ nativeBuildInputs = oldAttrs.nativeBuildInputs ++ [
+ pkgs.clippy
+ pkgs.clippy-sarif
+ pkgs.sarif-fmt
+ ];
+
+ buildPhase = ''
+ runHook preBuild
+ cargo clippy \
+ --all-features \
+ --all-targets \
+ --tests \
+ --message-format=json \
+ | clippy-sarif | tee $out | sarif-fmt
+ '';
+
+ dontInstall = true;
+ doCheck = false;
+ dontFixup = true;
+
+ passthru = { };
+ meta = { };
+ });
+
+ formatting =
+ pkgs.runCommand "check-formatting"
+ {
+ nativeBuildInputs = [
+ pkgs.cargo
+ pkgs.nixfmt-rfc-style
+ pkgs.rustfmt
+ ];
+ }
+ ''
+ cd ${self}
+
+ echo "Running cargo fmt"
+ cargo fmt -- --check
+
+ echo "Running nixfmt..."
+ nixfmt --check .
+
+ touch $out
+ '';
+ }
+ );
+
+ devShells = forAllSystems (
+ system:
+ let
+ pkgs = nixpkgsFor.${system};
+ in
+ lib.optionalAttrs (lib.elem system supportedSystems) {
+ default = pkgs.mkShell {
+ packages = [
+ # Rust tools
+ pkgs.clippy
+ pkgs.rust-analyzer
+ pkgs.rustfmt
+
+ # Nix tools
+ self.formatter.${system}
+ pkgs.nil
+ pkgs.statix
+ ];
+
+ env = {
+ RUST_SRC_PATH = toString pkgs.rustPlatform.rustLibSrc;
+ };
+
+ inputsFrom = [ self.packages.${system}.nix-forecast ];
+ };
+ }
+ );
+
+ formatter = forAllSystems (system: nixpkgsFor.${system}.nixfmt-rfc-style);
+
+ # for CI
+ legacyPackages = forAllSystems (
+ system:
+ lib.optionalAttrs (lib.elem system supportedSystems) (
+ lib.mapAttrs' (name: lib.nameValuePair "check-${name}") self.checks.${system}
+ )
+ );
+
+ packages = forAllSystems (
+ system:
+ let
+ pkgs = nixpkgsFor.${system};
+ nixForecastPackages = lib.makeScope pkgs.newScope (final: self.overlays.default final pkgs);
+
+ isCompatible = lib.meta.availableOn pkgs.stdenv.hostPlatform;
+ filteredPackages = lib.filterAttrs (
+ _: deriv: isCompatible deriv && lib.isDerivation deriv
+ ) nixForecastPackages;
+ in
+ filteredPackages
+ // {
+ default = filteredPackages.nix-forecast or pkgs.emptyFile;
+ }
+ );
+
+ overlays.default = final: _: {
+ nix-forecast = final.callPackage (
+ {
+ lib,
+ stdenv,
+ rustPlatform,
+ installShellFiles,
+ makeBinaryWrapper,
+ nix,
+ nix-forecast,
+ testers,
+ }:
+
+ rustPlatform.buildRustPackage rec {
+ pname = "nix-forecast";
+ inherit (passthru.cargoTOML.package) version;
+
+ cargoLock.lockFile = ./Cargo.lock;
+
+ src = nix-filter {
+ root = self;
+ include = [
+ ./Cargo.toml
+ ./Cargo.lock
+ ./build.rs
+ "src"
+ ];
+ };
+
+ nativeBuildInputs = [
+ installShellFiles
+ makeBinaryWrapper
+ ];
+
+ postInstall = ''
+ wrapProgram $out/bin/nix-forecast --suffix PATH : "${lib.makeBinPath [ nix ]}"
+
+ installShellCompletion --cmd nix-forecast \
+ --bash completions/nix-forecast.bash \
+ --fish completions/nix-forecast.fish \
+ --zsh completions/_nix-forecast
+ '';
+
+ env = {
+ COMPLETION_DIR = "completions";
+ };
+
+ passthru = {
+ cargoTOML = lib.importTOML ./Cargo.toml;
+
+ tests.version = testers.testVersion { package = nix-forecast; };
+ };
+
+ meta = {
+ description = "Check the forecast for today's Nix builds";
+ homepage = "https://github.com/getchoo/nix-forecast";
+ changelog = "https://github.com/getchoo/nix-forecast/releases/tag/${version}";
+ license = lib.licenses.mpl20;
+ maintainers = with lib.maintainers; [ getchoo ];
+ mainProgram = "nix-forecast";
+ };
+ }
+ ) { };
+ };
+ };
+}
diff --git a/src/cli.rs b/src/cli.rs
new file mode 100644
index 0000000..073162c
--- /dev/null
+++ b/src/cli.rs
@@ -0,0 +1,26 @@
+use clap::Parser;
+
+#[derive(Clone, Debug, Parser)]
+#[command(version, about, long_about = None)]
+pub struct Cli {
+ /// A list of Nix installables to look for. If not given, all paths in nixpkgs are checked
+ #[arg(required_unless_present("configuration"))]
+ pub installables: Option<Vec<String>>,
+
+ /// Flake reference pointing to a NixOS or nix-darwin configuration
+ #[allow(clippy::doc_markdown)] // Why does "NixOS" trigger this???
+ #[arg(short, long, conflicts_with("installables"))]
+ pub configuration: Option<String>,
+
+ /// URL of the substituter to check
+ #[arg(short, long, default_value = "https://cache.nixos.org")]
+ pub binary_cache: String,
+
+ /// Flake reference of nixpkgs (or other package repository)
+ #[arg(short, long, default_value = "nixpkgs")]
+ pub flake: String,
+
+ /// Show a list of store paths not found in the substituter
+ #[arg(short, long)]
+ pub show_missing: bool,
+}
diff --git a/src/command.rs b/src/command.rs
new file mode 100644
index 0000000..ef3461e
--- /dev/null
+++ b/src/command.rs
@@ -0,0 +1,123 @@
+use crate::{
+ http::{self, Ext},
+ nix,
+};
+
+use anyhow::Result;
+use futures::{stream, StreamExt, TryStreamExt};
+use indicatif::{ProgressBar, ProgressStyle};
+use tracing::instrument;
+
+pub trait Run {
+ async fn run(&self) -> Result<()>;
+}
+
+impl Run for crate::Cli {
+ #[instrument(skip(self))]
+ async fn run(&self) -> Result<()> {
+ let store_paths = if let Some(installables) = self.installables.clone() {
+ installables_paths(installables).await?
+ } else if let Some(configuration) = &self.configuration {
+ configuration_paths(configuration)?
+ } else {
+ nix::all_flake_installables(&self.flake)?
+ };
+
+ check_store_paths(&self.binary_cache, &store_paths, self.show_missing).await?;
+
+ Ok(())
+ }
+}
+
+#[instrument(skip(installables))]
+async fn installables_paths(installables: Vec<String>) -> Result<Vec<String>> {
+ println!(
+ "šŸ”ƒ Attempting to evaluating {} installable(s)",
+ installables.len()
+ );
+
+ // Find our outputs concurrently
+ let progress_bar = ProgressBar::new(installables.len() as u64).with_style(progress_style()?);
+ let out_paths: Vec<String> = stream::iter(&installables)
+ .map(|installable| {
+ let progress_bar = &progress_bar;
+ async move {
+ progress_bar.inc(1);
+ let out_path = nix::out_path(installable)?;
+
+ anyhow::Ok(out_path)
+ }
+ })
+ .buffer_unordered(num_cpus::get()) // try not to explode computers
+ .try_collect()
+ .await?;
+
+ println!("āœ… Evaluated {} installable(s)!", out_paths.len());
+ Ok(out_paths)
+}
+
+#[instrument(skip(configuration_ref))]
+fn configuration_paths(configuration_ref: &str) -> Result<Vec<String>> {
+ println!("ā“ Indexing requisites of configuration closure");
+ let closure_paths = nix::configuration_closure_paths(configuration_ref)?;
+ Ok(closure_paths)
+}
+
+#[allow(clippy::cast_precision_loss)]
+#[instrument(skip(store_paths))]
+async fn check_store_paths(
+ binary_cache: &str,
+ store_paths: &Vec<String>,
+ show_missing: bool,
+) -> Result<()> {
+ let num_store_paths = store_paths.len();
+ println!("šŸŒ”ļø Checking for {num_store_paths} store path(s) in {binary_cache}",);
+
+ let http = <http::Client as http::Ext>::default();
+ let progress_bar = ProgressBar::new(num_store_paths as u64).with_style(progress_style()?);
+ let uncached_paths: Vec<&str> = stream::iter(store_paths)
+ // Check the cache for all of our paths
+ .map(|store_path| {
+ let http = &http;
+ let progress_bar = &progress_bar;
+ async move {
+ let has_store_path = http.has_store_path(binary_cache, store_path).await?;
+ progress_bar.inc(1);
+
+ anyhow::Ok((has_store_path, store_path.as_str()))
+ }
+ })
+ .buffer_unordered(100)
+ // Filter out misses
+ .try_filter_map(|(has_store_path, store_path)| async move {
+ Ok((!has_store_path).then_some(store_path))
+ })
+ .try_collect()
+ .await?;
+
+ let num_uncached = uncached_paths.len();
+ let num_cached = num_store_paths - num_uncached;
+
+ println!(
+ "ā˜€ļø {:.2}% of paths available ({} out of {})",
+ (num_cached as f32 / num_store_paths as f32) * 100.0,
+ num_cached,
+ num_store_paths,
+ );
+
+ if show_missing {
+ println!(
+ "\nā›ˆļø Found {num_uncached} uncached paths:\n{}",
+ uncached_paths.join("\n")
+ );
+ }
+
+ Ok(())
+}
+
+pub fn progress_style() -> Result<ProgressStyle> {
+ Ok(
+ ProgressStyle::with_template("[{elapsed_precise}] {bar:40} {pos:>7}/{len:7} {msg}")?
+ .progress_chars("##-"),
+ )
+}
diff --git a/src/http.rs b/src/http.rs
new file mode 100644
index 0000000..1b37d4c
--- /dev/null
+++ b/src/http.rs
@@ -0,0 +1,77 @@
+/// HTTP interfaces
+use crate::Error;
+
+use anyhow::Result;
+use reqwest::{Method, StatusCode};
+use tracing::{event, instrument, Level};
+
+// https://nix.dev/manual/nix/2.24/store/store-path
+const STORE_DIRECTORY: &str = "/nix/store";
+const DIGEST_SIZE: usize = 32;
+
+pub type Client = reqwest::Client;
+
+pub trait Ext {
+ fn default() -> Self;
+ async fn has_store_path(&self, binary_cache_url: &str, store_path: &str) -> Result<bool>;
+}
+
+impl Ext for Client {
+ /// Create a client with our user agent
+ fn default() -> Self {
+ Client::builder()
+ .user_agent(concat!(
+ env!("CARGO_PKG_NAME"),
+ "/",
+ env!("CARGO_PKG_VERSION")
+ ))
+ .build()
+ .unwrap()
+ }
+
+ /// Check if a store path is available in the given binary cache
+ #[instrument(skip(self, binary_cache_url, store_path))]
+ async fn has_store_path(&self, binary_cache_url: &str, store_path: &str) -> Result<bool> {
+ let url = format!(
+ "{binary_cache_url}/{}.narinfo",
+ hash_from_store_path(store_path)
+ );
+
+ let request = self.request(Method::HEAD, url).build()?;
+ event!(
+ Level::TRACE,
+ "Checking for store path {store_path} in binary cache at {}",
+ request.url()
+ );
+ let response = self.execute(request).await?;
+
+ match response.status() {
+ StatusCode::OK => {
+ event!(
+ Level::TRACE,
+ "Found store path `{store_path}` in binary cache"
+ );
+ Ok(true)
+ }
+ StatusCode::NOT_FOUND => {
+ event!(
+ Level::TRACE,
+ "Did not find store path `{store_path}` in binary cache"
+ );
+ Ok(false)
+ }
+ status_code => Err(Error::HTTPFailed(status_code).into()),
+ }
+ }
+}
+
+/// Strip the <hash> from /nix/store/<hash>-<name>
+fn hash_from_store_path(store_path: &str) -> &str {
+ // Store paths will always start with the store directory, followed by a path separator. See
+ // the above link
+ let start_index = STORE_DIRECTORY.len() + 1;
+ // The next DIGEST_SIZE characters will then be the digest
+ let end_index = start_index + DIGEST_SIZE;
+
+ &store_path[start_index..end_index]
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..6d3fe4d
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,34 @@
+#![allow(clippy::multiple_crate_versions)]
+use anyhow::Result;
+use clap::Parser;
+use reqwest::StatusCode;
+use tracing::instrument;
+
+mod cli;
+mod command;
+mod http;
+mod nix;
+
+use cli::Cli;
+use command::Run;
+
+#[derive(Clone, Debug, thiserror::Error)]
+enum Error {
+ #[error("Unstable to complete HTTP request: {0}")]
+ HTTPFailed(StatusCode),
+ #[error("Nix exited with code {code}: {stderr}")]
+ Nix { code: i32, stderr: String },
+}
+
+#[tokio::main]
+#[instrument]
+async fn main() -> Result<()> {
+ tracing_subscriber::fmt::init();
+
+ let cli = Cli::parse();
+ if let Err(why) = cli.run().await {
+ eprintln!("{why}");
+ }
+
+ Ok(())
+}
diff --git a/src/nix.rs b/src/nix.rs
new file mode 100644
index 0000000..a2268a2
--- /dev/null
+++ b/src/nix.rs
@@ -0,0 +1,153 @@
+/// Abstractions over Nix's CLI
+use crate::Error;
+
+use std::{collections::HashMap, process::Command};
+
+use anyhow::{Context, Result};
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use tracing::{event, instrument, Level};
+
+/// JSON output of `nix path-info`
+#[derive(Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct PathInfo {
+ path: String,
+}
+
+/// JSON output of `nix build`
+#[derive(Clone, Debug, Eq, PartialEq, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct Build {
+ drv_path: String,
+ /// Derivation output names and their path
+ outputs: HashMap<String, String>,
+}
+
+#[instrument(skip(installable))]
+pub fn dry_build_output(installable: &str) -> Result<Vec<u8>> {
+ event!(Level::TRACE, "Running command `nix build --extra-experimental-features 'nix-command flakes' --dry-run --json {installable}`");
+ let output = Command::new("nix")
+ .args([
+ "--extra-experimental-features",
+ "nix-command flakes",
+ "build",
+ "--dry-run",
+ "--json",
+ installable,
+ ])
+ .output()?;
+
+ if output.status.success() {
+ Ok(output.stdout)
+ } else {
+ let code = output.status.code().unwrap_or(1);
+ let stderr = String::from_utf8(output.stderr.clone()).unwrap_or_default();
+
+ Err(Error::Nix { code, stderr }.into())
+ }
+}
+
+/// Get the `outPath` (store path) of an installable
+#[instrument(skip(installable))]
+pub fn out_path(installable: &str) -> Result<String> {
+ let dry_build_output = dry_build_output(installable)?;
+ let data: Vec<Build> = serde_json::from_slice(&dry_build_output)?;
+
+ let out_path = data
+ .first()
+ .context("Unable to parse `nix build` output!")?
+ .outputs
+ .get("out")
+ .with_context(|| format!("Unable to find output `out` for installable {installable}"))?;
+
+ Ok(out_path.to_string())
+}
+
+/// Get the `drvPath` (derivation path) of an installable
+#[instrument(skip(installable))]
+pub fn drv_path(installable: &str) -> Result<String> {
+ let dry_build_output = dry_build_output(installable)?;
+ let data: Vec<Build> = serde_json::from_slice(&dry_build_output)?;
+
+ let drv_path = &data
+ .first()
+ .context("Unable to parse `nix build` output!")?
+ .drv_path;
+
+ Ok(drv_path.to_string())
+}
+
+/// Get all paths in a closure at the given store path
+#[instrument(skip(store_path))]
+pub fn closure_paths(store_path: &str) -> Result<Vec<String>> {
+ event!(Level::TRACE, "Running command `nix --extra-experimental-features 'nix-command flakes' path-info --json --recursive {store_path}`");
+ let output = Command::new("nix")
+ .args([
+ "--extra-experimental-features",
+ "nix-command flakes",
+ "path-info",
+ "--json",
+ "--recursive",
+ store_path,
+ ])
+ .output()?;
+
+ if output.status.success() {
+ let path_infos: Vec<PathInfo> = serde_json::from_slice(&output.stdout)?;
+ let paths = path_infos
+ .into_iter()
+ .map(|path_info| path_info.path)
+ .collect();
+ Ok(paths)
+ } else {
+ let code = output.status.code().unwrap_or(1);
+ let stderr = String::from_utf8(output.stderr.clone()).unwrap_or_default();
+
+ Err(Error::Nix { code, stderr }.into())
+ }
+}
+
+/// Get all paths in a NixOS or nix-darwin configuration's closure
+#[instrument(skip(configuration_ref))]
+pub fn configuration_closure_paths(configuration_ref: &str) -> Result<Vec<String>> {
+ let installable = format!("{configuration_ref}.config.system.build.toplevel");
+ let store_path = drv_path(&installable)?;
+ let paths = closure_paths(&store_path)?;
+
+ Ok(paths)
+}
+
+/// Get all installables available in a given Flake
+#[instrument(skip(flake_ref))]
+pub fn all_flake_installables(flake_ref: &str) -> Result<Vec<String>> {
+ event!(
+ Level::TRACE,
+ "Running command `nix --extra-experimental-features 'nix-command flakes' search --json {flake_ref} .`"
+ );
+ let output = Command::new("nix")
+ .args([
+ "--extra-experimental-features",
+ "nix-command flakes",
+ "search",
+ "--json",
+ flake_ref,
+ ".",
+ ])
+ .output()?;
+
+ if output.status.success() {
+ let search_results: HashMap<String, Value> = serde_json::from_slice(&output.stdout)?;
+ let package_names = search_results
+ .keys()
+ .map(|name| format!("{flake_ref}#{name}"))
+ .collect::<Vec<_>>();
+
+ Ok(package_names)
+ } else {
+ let code = output.status.code().unwrap_or(1);
+ let stderr = String::from_utf8(output.stderr.clone()).unwrap_or_default();
+
+ Err(Error::Nix { code, stderr }.into())
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-06 09:02:27 +0000