feat(mm): Initial commit with a basic image viewer

.envrc

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+use flake

.github/workflows/build.yaml

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+name: build
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  checks-matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - id: set-matrix
+        name: Generate Nix Matrix
+        run: |
+          set -Eeu
+          matrix="$(nix eval --json '.#githubActions.matrix')"
+          echo "matrix=$matrix" >> "$GITHUB_OUTPUT"
+
+  checks-build:
+    needs: checks-matrix
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix: ${{fromJSON(needs.checks-matrix.outputs.matrix)}}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - run: nix build -L '.#${{ matrix.attr }}'
+
+  codecov:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: "write"
+      contents: "read"
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: DeterminateSystems/nix-installer-action@main
+    - uses: DeterminateSystems/magic-nix-cache-action@main
+
+    - name: Run codecov
+      run: nix build .#checks.x86_64-linux.hello-llvm-cov
+
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v4.0.1
+      with:
+        flags: unittests
+        name: codecov-hello
+        fail_ci_if_error: true
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: ./result
+        verbose: true
+

.github/workflows/docs.yaml

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+name: docs
+
+on:
+  push:
+    branches: [ master ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: "write"
+      contents: "read"
+      pages: "write"
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: DeterminateSystems/nix-installer-action@main
+    - uses: DeterminateSystems/magic-nix-cache-action@main
+    - uses: DeterminateSystems/flake-checker-action@main
+
+    - name: Generate docs
+      run: nix build .#checks.x86_64-linux.hello-docs
+
+    - name: Setup Pages
+      uses: actions/configure-pages@v5
+
+    - name: Upload artifact
+      uses: actions/upload-pages-artifact@v3
+      with:
+        path: result/share/doc
+
+    - name: Deploy to gh-pages
+      id: deployment
+      uses: actions/deploy-pages@v4
+

.gitignore

@@ -0,0 +1,3 @@
+/result
+/target
+.direnv

Cargo.toml

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+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2024"
+license = "MIT"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4.5", features = ["derive"] }
+clap_complete = "4.5"
+error-stack = "0.5"
+thiserror = "2.0"
+tokio = "1.43.1"
+tracing = "0.1"
+tracing-subscriber = "0.3"
+gpui = { git = "https://github.com/zed-industries/zed", default-features = false, features = ["wayland"] }
+nalgebra = "0.34.1"
+wayland-sys = { version = "0.31.7", default-features = false }
+wayland-backend = { version = "0.3.11", default-features = false }
+ignore = { version = "0.4.23", features = ["simd-accel"] }

deny.toml

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+# This template contains all of the possible sections and their default values
+
+# Note that all fields that take a lint level have these possible values:
+# * deny - An error will be produced and the check will fail
+# * warn - A warning will be produced, but the check will not fail
+# * allow - No warning or error will be produced, though in some cases a note
+# will be
+
+# The values provided in this template are the default values that will be used
+# when any section or field is not specified in your own configuration
+
+# Root options
+
+# The graph table configures how the dependency graph is constructed and thus
+# which crates the checks are performed against
+[graph]
+# If 1 or more target triples (and optionally, target_features) are specified,
+# only the specified targets will be checked when running `cargo deny check`.
+# This means, if a particular package is only ever used as a target specific
+# dependency, such as, for example, the `nix` crate only being used via the
+# `target_family = "unix"` configuration, that only having windows targets in
+# this list would mean the nix crate, as well as any of its exclusive
+# dependencies not shared by any other crates, would be ignored, as the target
+# list here is effectively saying which targets you are building for.
+targets = [
+  # The triple can be any string, but only the target triples built in to
+  # rustc (as of 1.40) can be checked against actual config expressions
+  #"x86_64-unknown-linux-musl",
+  # You can also specify which target_features you promise are enabled for a
+  # particular target. target_features are currently not validated against
+  # the actual valid features supported by the target architecture.
+  #{ triple = "wasm32-unknown-unknown", features = ["atomics"] },
+]
+# When creating the dependency graph used as the source of truth when checks are
+# executed, this field can be used to prune crates from the graph, removing them
+# from the view of cargo-deny. This is an extremely heavy hammer, as if a crate
+# is pruned from the graph, all of its dependencies will also be pruned unless
+# they are connected to another crate in the graph that hasn't been pruned,
+# so it should be used with care. The identifiers are [Package ID Specifications]
+# (https://doc.rust-lang.org/cargo/reference/pkgid-spec.html)
+#exclude = []
+# If true, metadata will be collected with `--all-features`. Note that this can't
+# be toggled off if true, if you want to conditionally enable `--all-features` it
+# is recommended to pass `--all-features` on the cmd line instead
+all-features = false
+# If true, metadata will be collected with `--no-default-features`. The same
+# caveat with `all-features` applies
+no-default-features = false
+# If set, these feature will be enabled when collecting metadata. If `--features`
+# is specified on the cmd line they will take precedence over this option.
+#features = []
+
+# The output table provides options for how/if diagnostics are outputted
+[output]
+# When outputting inclusion graphs in diagnostics that include features, this
+# option can be used to specify the depth at which feature edges will be added.
+# This option is included since the graphs can be quite large and the addition
+# of features from the crate(s) to all of the graph roots can be far too verbose.
+# This option can be overridden via `--feature-depth` on the cmd line
+feature-depth = 1
+
+# This section is considered when running `cargo deny check advisories`
+# More documentation for the advisories section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/advisories/cfg.html
+[advisories]
+# The path where the advisory databases are cloned/fetched into
+#db-path = "$CARGO_HOME/advisory-dbs"
+# The url(s) of the advisory databases to use
+#db-urls = ["https://github.com/rustsec/advisory-db"]
+# A list of advisory IDs to ignore. Note that ignored advisories will still
+# output a note when they are encountered.
+ignore = [
+  #"RUSTSEC-0000-0000",
+  #{ id = "RUSTSEC-0000-0000", reason = "you can specify a reason the advisory is ignored" },
+  #"a-crate-that-is-yanked@0.1.1", # you can also ignore yanked crate versions if you wish
+  #{ crate = "a-crate-that-is-yanked@0.1.1", reason = "you can specify why you are ignoring the yanked crate" },
+]
+# If this is true, then cargo deny will use the git executable to fetch advisory database.
+# If this is false, then it uses a built-in git library.
+# Setting this to true can be helpful if you have special authentication requirements that cargo-deny does not support.
+# See Git Authentication for more information about setting up git authentication.
+#git-fetch-with-cli = true
+
+# This section is considered when running `cargo deny check licenses`
+# More documentation for the licenses section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/licenses/cfg.html
+[licenses]
+# List of explicitly allowed licenses
+# See https://spdx.org/licenses/ for list of possible licenses
+# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
+allow = [
+  "MIT",
+  "Apache-2.0",
+  "Unicode-3.0",
+  #"Apache-2.0 WITH LLVM-exception",
+]
+# The confidence threshold for detecting a license from license text.
+# The higher the value, the more closely the license text must be to the
+# canonical license text of a valid SPDX license file.
+# [possible values: any between 0.0 and 1.0].
+confidence-threshold = 0.8
+# Allow 1 or more licenses on a per-crate basis, so that particular licenses
+# aren't accepted for every possible crate as with the normal allow list
+exceptions = [
+  # Each entry is the crate and version constraint, and its specific allow
+  # list
+  #{ allow = ["Zlib"], crate = "adler32" },
+]
+
+# Some crates don't have (easily) machine readable licensing information,
+# adding a clarification entry for it allows you to manually specify the
+# licensing information
+#[[licenses.clarify]]
+# The package spec the clarification applies to
+#crate = "ring"
+# The SPDX expression for the license requirements of the crate
+#expression = "MIT AND ISC AND OpenSSL"
+# One or more files in the crate's source used as the "source of truth" for
+# the license expression. If the contents match, the clarification will be used
+# when running the license check, otherwise the clarification will be ignored
+# and the crate will be checked normally, which may produce warnings or errors
+# depending on the rest of your configuration
+#license-files = [
+# Each entry is a crate relative path, and the (opaque) hash of its contents
+#{ path = "LICENSE", hash = 0xbd0eed23 }
+#]
+
+[licenses.private]
+# If true, ignores workspace crates that aren't published, or are only
+# published to private registries.
+# To see how to mark a crate as unpublished (to the official registry),
+# visit https://doc.rust-lang.org/cargo/reference/manifest.html#the-publish-field.
+ignore = false
+# One or more private registries that you might publish crates to, if a crate
+# is only published to private registries, and ignore is true, the crate will
+# not have its license(s) checked
+registries = [
+  #"https://sekretz.com/registry
+]
+
+# This section is considered when running `cargo deny check bans`.
+# More documentation about the 'bans' section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/bans/cfg.html
+[bans]
+# Lint level for when multiple versions of the same crate are detected
+multiple-versions = "warn"
+# Lint level for when a crate version requirement is `*`
+wildcards = "allow"
+# The graph highlighting used when creating dotgraphs for crates
+# with multiple versions
+# * lowest-version - The path to the lowest versioned duplicate is highlighted
+# * simplest-path - The path to the version with the fewest edges is highlighted
+# * all - Both lowest-version and simplest-path are used
+highlight = "all"
+# The default lint level for `default` features for crates that are members of
+# the workspace that is being checked. This can be overridden by allowing/denying
+# `default` on a crate-by-crate basis if desired.
+workspace-default-features = "allow"
+# The default lint level for `default` features for external crates that are not
+# members of the workspace. This can be overridden by allowing/denying `default`
+# on a crate-by-crate basis if desired.
+external-default-features = "allow"
+# List of crates that are allowed. Use with care!
+allow = [
+  #"ansi_term@0.11.0",
+  #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason it is allowed" },
+]
+# List of crates to deny
+deny = [
+  #"ansi_term@0.11.0",
+  #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason it is banned" },
+  # Wrapper crates can optionally be specified to allow the crate when it
+  # is a direct dependency of the otherwise banned crate
+  #{ crate = "ansi_term@0.11.0", wrappers = ["this-crate-directly-depends-on-ansi_term"] },
+]
+
+# List of features to allow/deny
+# Each entry the name of a crate and a version range. If version is
+# not specified, all versions will be matched.
+#[[bans.features]]
+#crate = "reqwest"
+# Features to not allow
+#deny = ["json"]
+# Features to allow
+#allow = [
+#    "rustls",
+#    "__rustls",
+#    "__tls",
+#    "hyper-rustls",
+#    "rustls",
+#    "rustls-pemfile",
+#    "rustls-tls-webpki-roots",
+#    "tokio-rustls",
+#    "webpki-roots",
+#]
+# If true, the allowed features must exactly match the enabled feature set. If
+# this is set there is no point setting `deny`
+#exact = true
+
+# Certain crates/versions that will be skipped when doing duplicate detection.
+skip = [
+  #"ansi_term@0.11.0",
+  #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason why it can't be updated/removed" },
+]
+# Similarly to `skip` allows you to skip certain crates during duplicate
+# detection. Unlike skip, it also includes the entire tree of transitive
+# dependencies starting at the specified crate, up to a certain depth, which is
+# by default infinite.
+skip-tree = [
+  #"ansi_term@0.11.0", # will be skipped along with _all_ of its direct and transitive dependencies
+  #{ crate = "ansi_term@0.11.0", depth = 20 },
+]
+
+# This section is considered when running `cargo deny check sources`.
+# More documentation about the 'sources' section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/sources/cfg.html
+[sources]
+# Lint level for what to happen when a crate from a crate registry that is not
+# in the allow list is encountered
+unknown-registry = "warn"
+# Lint level for what to happen when a crate from a git repository that is not
+# in the allow list is encountered
+unknown-git = "warn"
+# List of URLs for allowed crate registries. Defaults to the crates.io index
+# if not specified. If it is specified but empty, no registries are allowed.
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
+# List of URLs for allowed Git repositories
+allow-git = []
+
+[sources.allow-org]
+# github.com organizations to allow git sources for
+github = []
+# gitlab.com organizations to allow git sources for
+gitlab = []
+# bitbucket.org organizations to allow git sources for
+bitbucket = []

flake.lock

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+{
+  "nodes": {
+    "advisory-db": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1759506957,
+        "narHash": "sha256-czXIV7Yxo4MlBnItk0h6nomIcgUbq0qmOa8a7/fzKjI=",
+        "owner": "rustsec",
+        "repo": "advisory-db",
+        "rev": "ce9208c0021cd8a6b66ff4b345171e8eedd0441c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rustsec",
+        "repo": "advisory-db",
+        "type": "github"
+      }
+    },
+    "crane": {
+      "locked": {
+        "lastModified": 1759691647,
+        "narHash": "sha256-OnyPw3KaXL909I+FNyD6jfkAP/gdL/K0iitMHxo7ieM=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "1e7905b1eb1b551aade75169940557b6c51ed920",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1737420293,
+        "narHash": "sha256-F1G5ifvqTpJq7fdkT34e/Jy9VCyzd5XfJ9TO8fHhJWE=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "f4158fa080ef4503c8f4c820967d946c2af31ec9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1759381078,
+        "narHash": "sha256-gTrEEp5gEspIcCOx9PD8kMaF1iEmfBcTbO0Jag2QhQs=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "7df7ff7d8e00218376575f0acdcc5d66741351ee",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "advisory-db": "advisory-db",
+        "crane": "crane",
+        "flake-utils": "flake-utils",
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1759718104,
+        "narHash": "sha256-TbkLsgdnXHUXR4gOQBmhxkEE9ne+eHmX1chZHWRogy0=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "edea9f33f9a03f615ad3609a40fbcefe0ec835ca",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,169 @@
+{
+  description = "A simple rust flake using rust-overlay and craneLib";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    crane.url = "github:ipetkov/crane";
+    nix-github-actions = {
+      url = "github:nix-community/nix-github-actions";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    advisory-db = {
+      url = "github:rustsec/advisory-db";
+      flake = false;
+    };
+  };
+
+  outputs = {
+    self,
+    crane,
+    flake-utils,
+    nixpkgs,
+    rust-overlay,
+    advisory-db,
+    nix-github-actions,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [
+            rust-overlay.overlays.default
+          ];
+        };
+        inherit (pkgs) lib;
+        cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
+        name = cargoToml.package.name;
+
+        stableToolchain = pkgs.rust-bin.stable.latest.default;
+        stableToolchainWithLLvmTools = stableToolchain.override {
+          extensions = ["rust-src" "llvm-tools"];
+        };
+        stableToolchainWithRustAnalyzer = stableToolchain.override {
+          extensions = ["rust-src" "rust-analyzer"];
+        };
+        craneLib = (crane.mkLib pkgs).overrideToolchain stableToolchain;
+        craneLibLLvmTools = (crane.mkLib pkgs).overrideToolchain stableToolchainWithLLvmTools;
+
+        src = let
+          filterBySuffix = path: exts: lib.any (ext: lib.hasSuffix ext path) exts;
+          sourceFilters = path: type: (craneLib.filterCargoSources path type) || filterBySuffix path [".c" ".h" ".hpp" ".cpp" ".cc"];
+        in
+          lib.cleanSourceWith {
+            filter = sourceFilters;
+            src = ./.;
+          };
+        commonArgs =
+          {
+            inherit src;
+            pname = name;
+            stdenv = p: p.clangStdenv;
+            doCheck = false;
+            # LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
+            # nativeBuildInputs = with pkgs; [
+            #   cmake
+            #   llvmPackages.libclang.lib
+            # ];
+            buildInputs = with pkgs;
+              []
+              ++ (lib.optionals pkgs.stdenv.isDarwin [
+                libiconv
+                apple-sdk_13
+              ])
+              ++ (lib.optionals pkgs.stdenv.isLinux [
+                libxkbcommon
+                wayland
+                vulkan-loader
+              ]);
+            nativeBuildInputs = with pkgs; [
+              pkg-config
+            ];
+          }
+          // (lib.optionalAttrs pkgs.stdenv.isLinux {
+            # BINDGEN_EXTRA_CLANG_ARGS = "-I${pkgs.llvmPackages.libclang.lib}/lib/clang/18/include";
+          });
+        cargoArtifacts = craneLib.buildPackage commonArgs;
+      in {
+        checks =
+          {
+            "${name}-clippy" = craneLib.cargoClippy (commonArgs
+              // {
+                inherit cargoArtifacts;
+                cargoClippyExtraArgs = "--all-targets -- --deny warnings";
+              });
+            "${name}-docs" = craneLib.cargoDoc (commonArgs // {inherit cargoArtifacts;});
+            "${name}-fmt" = craneLib.cargoFmt {inherit src;};
+            "${name}-toml-fmt" = craneLib.taploFmt {
+              src = pkgs.lib.sources.sourceFilesBySuffices src [".toml"];
+            };
+            # Audit dependencies
+            "${name}-audit" = craneLib.cargoAudit {
+              inherit src advisory-db;
+            };
+
+            # Audit licenses
+            "${name}-deny" = craneLib.cargoDeny {
+              inherit src;
+            };
+            "${name}-nextest" = craneLib.cargoNextest (commonArgs
+              // {
+                inherit cargoArtifacts;
+                partitions = 1;
+                partitionType = "count";
+              });
+          }
+          // lib.optionalAttrs (!pkgs.stdenv.isDarwin) {
+            "${name}-llvm-cov" = craneLibLLvmTools.cargoLlvmCov (commonArgs // {inherit cargoArtifacts;});
+          };
+
+        packages = let
+          pkg = craneLib.buildPackage (commonArgs
+            // {inherit cargoArtifacts;}
+            // {
+              nativeBuildInputs = with pkgs; [
+                installShellFiles
+              ];
+              postInstall = ''
+                installShellCompletion --cmd ${name} \
+                  --bash <($out/bin/${name} completions bash) \
+                  --fish <($out/bin/${name} completions fish) \
+                  --zsh <($out/bin/${name} completions zsh)
+              '';
+            });
+        in {
+          "${name}" = pkg;
+          default = pkg;
+        };
+
+        devShells = {
+          default = pkgs.mkShell.override {stdenv = pkgs.clangStdenv;} (commonArgs
+            // {
+              packages = with pkgs;
+                [
+                  stableToolchainWithRustAnalyzer
+                  cargo-nextest
+                  cargo-deny
+                ]
+                ++ (lib.optionals pkgs.stdenv.isDarwin [
+                  apple-sdk_13
+                ]);
+              shellHook = ''
+                # Temp  solution until I can disable wayland-backend's dlopen feature in gpui itself
+                export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${builtins.toString (pkgs.lib.makeLibraryPath commonArgs.buildInputs)}";
+              '';
+            });
+        };
+      }
+    )
+    // {
+      githubActions = nix-github-actions.lib.mkGithubMatrix {
+        checks = nixpkgs.lib.getAttrs ["x86_64-linux"] self.checks;
+      };
+    };
+}

src/cli.rs

@@ -0,0 +1,21 @@
+use std::path::PathBuf;
+
+#[derive(Debug, clap::Parser)]
+pub struct Cli {
+    #[clap(default_value = ".")]
+    pub input: PathBuf,
+    #[clap(long, exclusive(true))]
+    pub completions: Option<clap_complete::Shell>,
+}
+
+impl Cli {
+    pub fn completions(shell: clap_complete::Shell) {
+        let mut command = <Cli as clap::CommandFactory>::command();
+        clap_complete::generate(
+            shell,
+            &mut command,
+            env!("CARGO_BIN_NAME"),
+            &mut std::io::stdout(),
+        );
+    }
+}

src/errors.rs

@@ -0,0 +1,6 @@
+pub use error_stack::{Report, ResultExt};
+#[derive(Debug, thiserror::Error)]
+#[error("An error occurred")]
+pub struct Error;
+
+pub type Result<T, E = error_stack::Report<Error>> = core::result::Result<T, E>;

src/main.rs

@@ -0,0 +1,39 @@
+mod cli;
+mod errors;
+use std::path::{Path, PathBuf};
+
+use errors::*;
+mod viewer;
+pub fn main() -> Result<()> {
+    let args = <cli::Cli as clap::Parser>::parse();
+    if let Some(shell) = args.completions {
+        cli::Cli::completions(shell);
+        return Ok(());
+    }
+    let files = walker(args.input);
+    if files.is_empty() {
+        return Err(Error).attach("No files found");
+    }
+    viewer::run(files);
+
+    Ok(())
+}
+
+// Returns all the children (if a dir) and sister (if an image) files of the input path
+fn walker(input: impl AsRef<Path>) -> Vec<PathBuf> {
+    let mut tb = ignore::types::TypesBuilder::new();
+    tb.add("image", "*.jpg").expect("Failed to add image type");
+    ignore::WalkBuilder::new(input)
+        .types(
+            tb.select("image")
+                .add_defaults()
+                .build()
+                .expect("Failed to build type finder"),
+        )
+        .sort_by_file_name(|a, b| a.cmp(b))
+        .build()
+        .filter_map(|e| e.ok())
+        .filter(|e| e.file_type().map_or(false, |ft| ft.is_file()))
+        .map(|e| e.path().to_path_buf())
+        .collect()
+}

src/viewer.rs

@@ -0,0 +1,90 @@
+use gpui::{
+    App, Application, Bounds, Context, KeyBinding, SharedString, Window, WindowBounds,
+    WindowOptions, actions, div, img, prelude::*, px, rgb, rgba, size,
+};
+use nalgebra::Vector2;
+use std::path::PathBuf;
+
+#[derive(Debug, Clone)]
+struct MMViewer {
+    files: Vec<PathBuf>,
+    current: usize,
+    zoom: f32,
+    pan: Vector2<f32>,
+}
+
+actions!(mm, [Quit, NextImage, PrevImage]);
+
+impl Render for MMViewer {
+    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        div()
+            .size_full()
+            .flex()
+            .on_action(cx.listener(Self::next_image))
+            .on_action(cx.listener(Self::prev_image))
+            .flex_col()
+            .justify_center()
+            .bg(rgb(0x505050))
+            .child(if let Some(file) = self.files.get(self.current) {
+                div()
+                    .flex()
+                    .flex_row()
+                    .size_full()
+                    .justify_center()
+                    .child(img(file.clone()).size_full())
+            } else {
+                div().child(format!(
+                    "No image found (index: {}, total: {})",
+                    self.current,
+                    self.files.len()
+                ))
+            })
+    }
+}
+
+impl MMViewer {
+    fn next_image(&mut self, _: &NextImage, _: &mut Window, cx: &mut Context<Self>) {
+        dbg!("aasdfasdf");
+        if self.current + 1 < self.files.len() {
+            self.current += 1;
+            cx.notify();
+        }
+    }
+    fn prev_image(&mut self, _: &PrevImage, _: &mut Window, cx: &mut Context<Self>) {
+        dbg!("aasdfascawsdfasdfdf");
+        if self.current > 0 {
+            self.current -= 1;
+            cx.notify();
+        }
+    }
+}
+
+pub fn run(files: Vec<PathBuf>) {
+    Application::new().run(|cx: &mut App| {
+        let bounds = Bounds::centered(None, size(px(800f32), px(600f32)), cx);
+        cx.on_action(|_: &Quit, cx| cx.quit());
+        cx.bind_keys([
+            KeyBinding::new("q", Quit, None),
+            KeyBinding::new("Escape", Quit, None),
+            KeyBinding::new("j", NextImage, None),
+            KeyBinding::new("k", PrevImage, None),
+        ]);
+        cx.open_window(
+            WindowOptions {
+                window_bounds: Some(WindowBounds::Windowed(bounds)),
+                // bounds: WindowBounds::Fixed(bounds),
+                ..Default::default()
+            },
+            |_, cx| {
+                cx.new(|_| MMViewer {
+                    files,
+                    current: 0,
+                    zoom: 1.0,
+                    pan: Vector2::new(0.0, 0.0),
+                })
+            },
+        )
+        .expect("Failed to open window");
+        cx.activate(true);
+    });
+}