feat(tazjin/gio-list-apps): CLI to list xdg apps using Gio library r/6528

This does nothing other than dump out the list of XDG apps to stdout
in JSON format. There are no options or anything.

This can be used for selection in app launchers (e.g. dmenu, something
based on completing-read in emacs, rofi, etc.).

I wrote this because I don't want to deal with having to do this in
Elisp. It's also unclear what logic actually hides behind under the
hood here, so why not just use the official library.

Change-Id: I16fed2c92760cadecc02c59a4e537a1fa247aff9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9157
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI

5 files changed, 551 insertions, 0 deletions

diff --git a/users/tazjin/gio-list-apps/.gitignore b/users/tazjin/gio-list-apps/.gitignore
new file mode 100644
index 0000000000..2f7896d1d1
--- /dev/null
+++ b/users/tazjin/gio-list-apps/.gitignore
@@ -0,0 +1 @@
+target/
diff --git a/users/tazjin/gio-list-apps/Cargo.lock b/users/tazjin/gio-list-apps/Cargo.lock
new file mode 100644
index 0000000000..f357795566
--- /dev/null
+++ b/users/tazjin/gio-list-apps/Cargo.lock
@@ -0,0 +1,512 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
+
+[[package]]
+name = "cfg-expr"
+version = "0.15.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b40ccee03b5175c18cde8f37e7d2a33bcef6f8ec8f7cc0d81090d1bb380949c9"
+dependencies = [
+ "smallvec",
+ "target-lexicon",
+]
+
+[[package]]
+name = "equivalent"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+
+[[package]]
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+dependencies = [
+ "futures-core",
+]
+
+[[package]]
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+
+[[package]]
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+checksum = "ccecee823288125bd88b4d7f565c9e58e41858e47ab72e8ea2d64e93624386e0"
+dependencies = [
+ "futures-core",
+ "futures-task",
+ "futures-util",
+]
+
+[[package]]
+name = "futures-io"
+version = "0.3.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fff74096e71ed47f8e023204cfd0aa1289cd54ae5430a9523be060cdb849964"
+
+[[package]]
+name = "futures-macro"
+version = "0.3.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.29",
+]
+
+[[package]]
+name = "futures-task"
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+[[package]]
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+dependencies = [
+ "futures-core",
+ "futures-macro",
+ "futures-task",
+ "pin-project-lite",
+ "pin-utils",
+ "slab",
+]
+
+[[package]]
+name = "gio"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7884cba6b1c5db1607d970cadf44b14a43913d42bc68766eea6a5e2fe0891524"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "futures-io",
+ "futures-util",
+ "gio-sys",
+ "glib",
+ "libc",
+ "once_cell",
+ "pin-project-lite",
+ "smallvec",
+ "thiserror",
+]
+
+[[package]]
+name = "gio-list-apps"
+version = "0.1.0"
+dependencies = [
+ "gio",
+ "serde_json",
+]
+
+[[package]]
+name = "gio-sys"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37566df850baf5e4cb0dfb78af2e4b9898d817ed9263d1090a2df958c64737d2"
+dependencies = [
+ "glib-sys",
+ "gobject-sys",
+ "libc",
+ "system-deps",
+ "winapi",
+]
+
+[[package]]
+name = "glib"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "331156127e8166dd815cf8d2db3a5beb492610c716c03ee6db4f2d07092af0a7"
+dependencies = [
+ "bitflags",
+ "futures-channel",
+ "futures-core",
+ "futures-executor",
+ "futures-task",
+ "futures-util",
+ "gio-sys",
+ "glib-macros",
+ "glib-sys",
+ "gobject-sys",
+ "libc",
+ "memchr",
+ "once_cell",
+ "smallvec",
+ "thiserror",
+]
+
+[[package]]
+name = "glib-macros"
+version = "0.18.0"
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+dependencies = [
+ "heck",
+ "proc-macro-crate",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.29",
+]
+
+[[package]]
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+ "libc",
+ "system-deps",
+]
+
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+ "glib-sys",
+ "libc",
+ "system-deps",
+]
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+ "hashbrown",
+]
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+[[package]]
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+]
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+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "version_check",
+]
+
+[[package]]
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+]
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+ "cfg-expr",
+ "heck",
+ "pkg-config",
+ "toml",
+ "version-compare",
+]
+
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+ "toml_edit",
+]
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+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "winnow",
+]
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+[[package]]
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+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
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+version = "0.4.0"
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+
+[[package]]
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+[[package]]
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+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "memchr",
+]
diff --git a/users/tazjin/gio-list-apps/Cargo.toml b/users/tazjin/gio-list-apps/Cargo.toml
new file mode 100644
index 0000000000..f08260b988
--- /dev/null
+++ b/users/tazjin/gio-list-apps/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "gio-list-apps"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+gio = "0.18.1"
+serde_json = "1.0.105"
diff --git a/users/tazjin/gio-list-apps/default.nix b/users/tazjin/gio-list-apps/default.nix
new file mode 100644
index 0000000000..200bf43542
--- /dev/null
+++ b/users/tazjin/gio-list-apps/default.nix
@@ -0,0 +1,9 @@
+{ pkgs, lib, ... }:
+
+pkgs.rustPlatform.buildRustPackage {
+  name = "gio-list-apps";
+  src = lib.cleanSource ./.;
+  cargoLock.lockFile = ./Cargo.lock;
+  nativeBuildInputs = [ pkgs.pkg-config ];
+  buildInputs = [ pkgs.gtk3 ];
+}
diff --git a/users/tazjin/gio-list-apps/src/main.rs b/users/tazjin/gio-list-apps/src/main.rs
new file mode 100644
index 0000000000..2b04ac06a7
--- /dev/null
+++ b/users/tazjin/gio-list-apps/src/main.rs
@@ -0,0 +1,19 @@
+use gio::traits::AppInfoExt;
+use gio::AppInfo;
+use serde_json::json;
+
+fn main() {
+    for app in AppInfo::all() {
+        if app.should_show() {
+            if let Some(cmd) = app.commandline() {
+                println!(
+                    "{}",
+                    json!({
+                        "name": app.name().as_str(),
+                        "commandline": cmd,
+                    })
+                );
+            }
+        }
+    }
+}