add EWW_TIME magic variable (#792)

CHANGELOG.md

@@ -16,6 +16,7 @@ All notable changes to eww will be listed here, starting at changes since versio
 - Add Vanilla CSS support (By: Ezequiel Ramis)
 - Add `jq` function, offering jq-style json processing
 - Add `justify` property to the label widget, allowing text justification (By: n3oney)
+- Add `EWW_TIME` magic variable (By: Erenoit)
 
 ## [0.4.0] (04.09.2022)
 

Cargo.lock

@@ -31,6 +31,21 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.70"
@@ -134,6 +149,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bumpalo"
+version = "3.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1"
+
 [[package]]
 name = "bytes"
 version = "1.2.1"
@@ -204,9 +225,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.77"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9f73505338f7d905b19d18738976aae232eb46b8efc15554ffc56deb5d9ebe4"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
 
 [[package]]
 name = "cfg-expr"
@@ -223,6 +244,43 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "chrono"
+version = "0.4.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec837a71355b28f6556dbd569b37b3f363091c0bd4b2e735674521b4c5fd9bc5"
+dependencies = [
+ "android-tzdata",
+ "iana-time-zone",
+ "js-sys",
+ "num-traits",
+ "time",
+ "wasm-bindgen",
+ "winapi",
+]
+
+[[package]]
+name = "chrono-tz"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf9cc2b23599e6d7479755f3594285efb3f74a1bdca7a7374948bc831e23a552"
+dependencies = [
+ "chrono",
+ "chrono-tz-build",
+ "phf 0.11.1",
+]
+
+[[package]]
+name = "chrono-tz-build"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9998fb9f7e9b2111641485bf8beb32f92945f97f92a3d061f744cfef335f751"
+dependencies = [
+ "parse-zoneinfo",
+ "phf 0.11.1",
+ "phf_codegen",
+]
+
 [[package]]
 name = "chumsky"
 version = "0.8.0"
@@ -534,6 +592,7 @@ dependencies = [
  "bincode",
  "cairo-rs",
  "cairo-sys-rs",
+ "chrono",
  "clap",
  "codespan-reporting",
  "derive_more",
@@ -822,7 +881,7 @@ checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
 ]
 
 [[package]]
@@ -930,7 +989,7 @@ dependencies = [
  "indexmap",
  "lasso",
  "once_cell",
- "phf",
+ "phf 0.10.1",
 ]
 
 [[package]]
@@ -1067,6 +1126,29 @@ dependencies = [
  "quick-error",
 ]
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.56"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0722cd7114b7de04316e7ea5456a0bbb20e4adb46fd27a3697adb812cff0f37c"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "windows",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -1198,6 +1280,15 @@ dependencies = [
  "jaq-parse",
 ]
 
+[[package]]
+name = "js-sys"
+version = "0.3.63"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f37a4a5928311ac501dee68b3c7613a1037d0edb30c8e5427bd832d55d1b790"
+dependencies = [
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "kqueue"
 version = "1.0.7"
@@ -1340,7 +1431,7 @@ checksum = "e5d732bc30207a6423068df043e3d02e0735b155ad7ce1a6f76fe2baa5b158de"
 dependencies = [
  "libc",
  "log",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
  "windows-sys 0.42.0",
 ]
 
@@ -1404,6 +1495,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "num-traits"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.13.1"
@@ -1483,6 +1583,15 @@ dependencies = [
  "windows-sys 0.42.0",
 ]
 
+[[package]]
+name = "parse-zoneinfo"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c705f256449c60da65e11ff6626e0c16a0a0b96aaa348de61376b249bc340f41"
+dependencies = [
+ "regex",
+]
+
 [[package]]
 name = "pest"
 version = "2.4.0"
@@ -1510,17 +1619,46 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fabbf1ead8a5bcbc20f5f8b939ee3f5b0f6f281b6ad3468b84656b658b455259"
 dependencies = [
  "phf_macros",
- "phf_shared",
+ "phf_shared 0.10.0",
  "proc-macro-hack",
 ]
 
+[[package]]
+name = "phf"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "928c6535de93548188ef63bb7c4036bd415cd8f36ad25af44b9789b2ee72a48c"
+dependencies = [
+ "phf_shared 0.11.1",
+]
+
+[[package]]
+name = "phf_codegen"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a56ac890c5e3ca598bbdeaa99964edb5b0258a583a9eb6ef4e89fc85d9224770"
+dependencies = [
+ "phf_generator 0.11.1",
+ "phf_shared 0.11.1",
+]
+
 [[package]]
 name = "phf_generator"
 version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d5285893bb5eb82e6aaf5d59ee909a06a16737a8970984dd7746ba9283498d6"
 dependencies = [
- "phf_shared",
+ "phf_shared 0.10.0",
+ "rand",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1181c94580fa345f50f19d738aaa39c0ed30a600d95cb2d3e23f94266f14fbf"
+dependencies = [
+ "phf_shared 0.11.1",
  "rand",
 ]
 
@@ -1530,8 +1668,8 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "58fdf3184dd560f160dd73922bea2d5cd6e8f064bf4b13110abd81b03697b4e0"
 dependencies = [
- "phf_generator",
+ "phf_generator 0.10.0",
- "phf_shared",
+ "phf_shared 0.10.0",
  "proc-macro-hack",
  "proc-macro2",
  "quote",
@@ -1547,6 +1685,15 @@ dependencies = [
  "siphasher",
 ]
 
+[[package]]
+name = "phf_shared"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1fb5f6f826b772a8d4c0394209441e7d37cbbb967ae9c7e0e8134365c9ee676"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "pico-args"
 version = "0.4.2"
@@ -1925,6 +2072,8 @@ name = "simplexpr"
 version = "0.1.0"
 dependencies = [
  "cached",
+ "chrono",
+ "chrono-tz",
  "eww_shared_util",
  "insta",
  "itertools",
@@ -1999,7 +2148,7 @@ dependencies = [
  "new_debug_unreachable",
  "once_cell",
  "parking_lot",
- "phf_shared",
+ "phf_shared 0.10.0",
  "precomputed-hash",
 ]
 
@@ -2131,6 +2280,17 @@ dependencies = [
  "syn 1.0.103",
 ]
 
+[[package]]
+name = "time"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
+dependencies = [
+ "libc",
+ "wasi 0.10.0+wasi-snapshot-preview1",
+ "winapi",
+]
+
 [[package]]
 name = "tiny-keccak"
 version = "2.0.2"
@@ -2255,12 +2415,72 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "wasi"
+version = "0.10.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bba0e8cb82ba49ff4e229459ff22a191bbe9a1cb3a341610c9c33efc27ddf73"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19b04bc93f9d6bdee709f6bd2118f57dd6679cf1176a1af464fca3ab0d66d8fb"
+dependencies = [
+ "bumpalo",
+ "log",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.10",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14d6b024f1a526bb0234f52840389927257beb670610081360e5a03c5df9c258"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e128beba882dd1eb6200e1dc92ae6c5dbaa4311aa7bb211ca035779e5efc39f8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.10",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed9d5b4305409d1fc9482fee2d7f9bcbf24b3972bf59817ef757e23982242a93"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -2301,19 +2521,28 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
+dependencies = [
+ "windows-targets 0.48.0",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
 dependencies = [
- "windows_aarch64_gnullvm",
+ "windows_aarch64_gnullvm 0.42.2",
- "windows_aarch64_msvc",
+ "windows_aarch64_msvc 0.42.2",
- "windows_i686_gnu",
+ "windows_i686_gnu 0.42.2",
- "windows_i686_msvc",
+ "windows_i686_msvc 0.42.2",
- "windows_x86_64_gnu",
+ "windows_x86_64_gnu 0.42.2",
- "windows_x86_64_gnullvm",
+ "windows_x86_64_gnullvm 0.42.2",
- "windows_x86_64_msvc",
+ "windows_x86_64_msvc 0.42.2",
 ]
 
 [[package]]
@@ -2322,7 +2551,7 @@ version = "0.45.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.42.2",
 ]
 
 [[package]]
@@ -2331,13 +2560,28 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
 dependencies = [
- "windows_aarch64_gnullvm",
+ "windows_aarch64_gnullvm 0.42.2",
- "windows_aarch64_msvc",
+ "windows_aarch64_msvc 0.42.2",
- "windows_i686_gnu",
+ "windows_i686_gnu 0.42.2",
- "windows_i686_msvc",
+ "windows_i686_msvc 0.42.2",
- "windows_x86_64_gnu",
+ "windows_x86_64_gnu 0.42.2",
- "windows_x86_64_gnullvm",
+ "windows_x86_64_gnullvm 0.42.2",
- "windows_x86_64_msvc",
+ "windows_x86_64_msvc 0.42.2",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
+dependencies = [
+ "windows_aarch64_gnullvm 0.48.0",
+ "windows_aarch64_msvc 0.48.0",
+ "windows_i686_gnu 0.48.0",
+ "windows_i686_msvc 0.48.0",
+ "windows_x86_64_gnu 0.48.0",
+ "windows_x86_64_gnullvm 0.48.0",
+ "windows_x86_64_msvc 0.48.0",
 ]
 
 [[package]]
@@ -2346,42 +2590,84 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+
 [[package]]
 name = "x11"
 version = "2.20.0"

crates/eww/Cargo.toml

@@ -54,6 +54,7 @@ futures-util = "0.3.27"
 tokio-util = "0.7.7"
 
 sysinfo = "0.28.4"
+chrono = "0.4.26"
 
 wait-timeout = "0.2"
 

crates/eww/src/config/inbuilt.rs

@@ -10,7 +10,7 @@ use crate::{config::system_stats::*, paths::EwwPaths};
 use eww_shared_util::VarName;
 
 macro_rules! define_builtin_vars {
-    ($interval:expr, $($name:literal => $fun:expr),*$(,)?) => {
+    ($($name:literal => $fun:expr => $interval:expr),*$(,)?) => {
         pub static INBUILT_VAR_NAMES: &[&'static str] = &[$($name),*];
         pub fn get_inbuilt_vars() -> HashMap<VarName, ScriptVarDefinition> {
             maplit::hashmap! {
@@ -29,18 +29,18 @@ macro_rules! define_builtin_vars {
     }
 }
 
-define_builtin_vars! { Duration::new(2, 0),
+define_builtin_vars! {
     // @desc EWW_TEMPS - Heat of the components in Celcius
     // @prop { <name>: temperature }
-    "EWW_TEMPS" => || Ok(DynVal::from(get_temperatures())),
+    "EWW_TEMPS" => || Ok(DynVal::from(get_temperatures())) => Duration::new(2, 0),
 
     // @desc EWW_RAM - Information on ram and swap usage in kB.
     // @prop { total_mem, free_mem, total_swap, free_swap, available_mem, used_mem, used_mem_perc }
-    "EWW_RAM" => || Ok(DynVal::from(get_ram())),
+    "EWW_RAM" => || Ok(DynVal::from(get_ram())) => Duration::new(2, 0),
 
     // @desc EWW_DISK - Information on on all mounted partitions (Might report inaccurately on some filesystems, like btrfs and zfs) Example: `{EWW_DISK["/"]}`
     // @prop { <mount_point>: { name, total, free, used, used_perc } }
-    "EWW_DISK" => || Ok(DynVal::from(get_disks())),
+    "EWW_DISK" => || Ok(DynVal::from(get_disks())) => Duration::new(2, 0),
 
     // @desc EWW_BATTERY - Battery capacity in procent of the main battery
     // @prop { <name>: { capacity, status } }
@@ -52,15 +52,18 @@ define_builtin_vars! { Duration::new(2, 0),
             }
             Ok(o) => o,
         }
-    )),
+    )) => Duration::new(2, 0),
 
     // @desc EWW_CPU - Information on the CPU cores: frequency and usage (No MacOS support)
     // @prop { cores: [{ core, freq, usage }], avg }
-    "EWW_CPU" => || Ok(DynVal::from(get_cpus())),
+    "EWW_CPU" => || Ok(DynVal::from(get_cpus())) => Duration::new(2, 0),
 
     // @desc EWW_NET - Bytes up/down on all interfaces
     // @prop { <name>: { up, down } }
-    "EWW_NET" => || Ok(DynVal::from(net())),
+    "EWW_NET" => || Ok(DynVal::from(net())) => Duration::new(2, 0),
+
+    // @desc EWW_TIME - Information on current time in UNIX timestamp
+    "EWW_TIME" => || Ok(DynVal::from(get_time())) => Duration::new(1, 0),
 }
 
 macro_rules! define_magic_constants {

crates/eww/src/config/system_stats.rs

@@ -177,3 +177,7 @@ pub fn net() -> String {
     );
     interfaces
 }
+
+pub fn get_time() -> String {
+    format!("{}", chrono::offset::Utc::now().format("%s"))
+}

crates/simplexpr/Cargo.toml

@@ -25,6 +25,8 @@ jaq-core = "0.9.0"
 jaq-std = {version = "0.9.0", features = ["bincode"]}
 static_assertions = "1.1.0"
 cached = "0.42.0"
+chrono = "0.4.26"
+chrono-tz = "0.8.2"
 
 strum = { version = "0.24", features = ["derive"] }
 

crates/simplexpr/src/dynval.rs

@@ -168,6 +168,10 @@ impl DynVal {
         self.0.parse().map_err(|e| ConversionError::new(self.clone(), "i32", e))
     }
 
+    pub fn as_i64(&self) -> Result<i64> {
+        self.0.parse().map_err(|e| ConversionError::new(self.clone(), "i64", e))
+    }
+
     pub fn as_bool(&self) -> Result<bool> {
         self.0.parse().map_err(|e| ConversionError::new(self.clone(), "bool", e))
     }

crates/simplexpr/src/eval.rs

@@ -1,4 +1,5 @@
 use cached::proc_macro::cached;
+use chrono::{Local, LocalResult, TimeZone};
 use itertools::Itertools;
 
 use crate::{
@@ -9,6 +10,7 @@ use eww_shared_util::{Span, Spanned, VarName};
 use std::{
     collections::HashMap,
     convert::{TryFrom, TryInto},
+    str::FromStr,
     sync::Arc,
 };
 
@@ -57,6 +59,9 @@ pub enum EvalError {
 
     #[error("{1}")]
     Spanned(Span, Box<EvalError>),
+
+    #[error("Error parsing date: {0}")]
+    ChronoError(String),
 }
 
 static_assertions::assert_impl_all!(EvalError: Send, Sync);
@@ -376,6 +381,24 @@ fn call_expr_function(name: &str, args: Vec<DynVal>) -> Result<DynVal, EvalError
                 .map_err(|e| EvalError::Spanned(code.span(), Box::new(e))),
             _ => Err(EvalError::WrongArgCount(name.to_string())),
         },
+        "formattime" => match args.as_slice() {
+            [timestamp, timezone, format] => {
+                let timezone = match chrono_tz::Tz::from_str(&timezone.as_string()?) {
+                    Ok(x) => x,
+                    Err(_) => return Err(EvalError::ChronoError("Invalid timezone".to_string())),
+                };
+
+                Ok(DynVal::from(match timezone.timestamp_opt(timestamp.as_i64()?, 0) {
+                    LocalResult::Single(t) | LocalResult::Ambiguous(t, _) => t.format(&format.as_string()?).to_string(),
+                    LocalResult::None => return Err(EvalError::ChronoError("Invalid UNIX timestamp".to_string())),
+                }))
+            }
+            [timestamp, format] => Ok(DynVal::from(match Local.timestamp_opt(timestamp.as_i64()?, 0) {
+                LocalResult::Single(t) | LocalResult::Ambiguous(t, _) => t.format(&format.as_string()?).to_string(),
+                LocalResult::None => return Err(EvalError::ChronoError("Invalid UNIX timestamp".to_string())),
+            })),
+            _ => Err(EvalError::WrongArgCount(name.to_string())),
+        },
 
         _ => Err(EvalError::UnknownFunction(name.to_string())),
     }

docs/src/expression_language.md

@@ -47,3 +47,11 @@ Supported currently are the following features:
 	- `arraylength(value)`: Gets the length of the array
 	- `objectlength(value)`: Gets the amount of entries in the object
 	- `jq(value, jq_filter_string)`: run a [jq](https://stedolan.github.io/jq/manual/) style command on a json value. (Uses [jaq](https://crates.io/crates/jaq) internally).
+    - `formattime(unix_timestamp, timezone, format_str)`: Gets the time in a given format from UNIX timestamp.
+      Check [chrono's documentation](https://docs.rs/chrono/latest/chrono/format/strftime/index.html) for more
+      information about format string and [chrono-tz's documentation](https://docs.rs/chrono-tz/latest/chrono_tz/enum.Tz.html)
+      for available time zones.
+    - `formattime(unix_timestamp, format_str)`: Gets the time in a given format from UNIX timestamp.
+      Same as other `formattime`, but does not accept timezone. Instead, it uses system's local timezone.
+      Check [chrono's documentation](https://docs.rs/chrono/latest/chrono/format/strftime/index.html) for more
+      information about format string.

docs/src/magic-vars.md

@@ -2,5 +2,5 @@
 
 These are variables that are always there, without you having to import them.
 
-The delay between the updating variables is always 2s.
+The delay between all the updating variables except `EWW_TIME` is 2s, for `EWW_TIME` it is 1s.