From 1209b6b1ea55a02a57eb34732ee1a1f3c699ce35 Mon Sep 17 00:00:00 2001
From: Orson Peters <orsonpeters@gmail.com>
Date: Wed, 16 Aug 2023 18:23:32 +0200
Subject: [PATCH] revert: fix(rust): fix build for wasm (#9502) (#10535)

---
 .github/workflows/test-rust.yml | 25 ------------------------
 crates/Makefile                 | 34 ---------------------------------
 crates/polars-io/Cargo.toml     |  4 +---
 crates/polars-io/src/utils.rs   |  5 ++---
 crates/polars-utils/src/wasm.rs |  8 --------
 5 files changed, 3 insertions(+), 73 deletions(-)

diff --git a/.github/workflows/test-rust.yml b/.github/workflows/test-rust.yml
index 6e1cdff9ba9d..dd3888faa7b7 100644
--- a/.github/workflows/test-rust.yml
+++ b/.github/workflows/test-rust.yml
@@ -114,28 +114,3 @@ jobs:
 
       - name: Run cargo hack
         run: cargo hack check -p polars --each-feature --no-dev-deps
-
-  check-wasm:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Set up Rust
-        run: |
-          rustup target add wasm32-unknown-unknown
-          rustup show
-
-      - name: Cache Rust
-        uses: Swatinem/rust-cache@v2
-        with:
-          save-if: ${{ github.ref_name == 'main' }}
-
-      - name: Install cargo hack
-        uses: taiki-e/install-action@v2
-        with:
-          tool: cargo-hack
-
-      - name: Check wasm
-        working-directory: crates
-        run: make check-wasm
-
diff --git a/crates/Makefile b/crates/Makefile
index d2d4b48b2e08..f90a480a39fc 100644
--- a/crates/Makefile
+++ b/crates/Makefile
@@ -110,37 +110,3 @@ publish:  ## Publish Polars crates
 help:  ## Display this help screen
 	@echo -e "\033[1mAvailable commands:\033[0m"
 	@grep -E '^[a-z.A-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[36m%-18s\033[0m %s\n", $$1, $$2}' | sort
-
-.PHONY: check-wasm
-check-wasm:  ## Check wasm build without supported features
-	cargo hack check --target wasm32-unknown-unknown -p polars --no-dev-deps  \
-		--each-feature                        \
-		--exclude-features async              \
-		--exclude-features aws                \
-		--exclude-features azure              \
-		--exclude-features cross_join         \
-		--exclude-features csv                \
-		--exclude-features decompress-fast    \
-		--exclude-features default            \
-		--exclude-features docs-selection     \
-		--exclude-features dtype-array        \
-		--exclude-features dtype-categorical  \
-		--exclude-features dtype-decimal      \
-		--exclude-features dtype-full         \
-		--exclude-features dtype-i16          \
-		--exclude-features dtype-i8           \
-		--exclude-features dtype-u16          \
-		--exclude-features dtype-u8           \
-		--exclude-features extract_jsonpath   \
-		--exclude-features fmt                \
-		--exclude-features gcp                \
-		--exclude-features ipc                \
-		--exclude-features ipc_streaming      \
-		--exclude-features json               \
-		--exclude-features nightly            \
-		--exclude-features parquet            \
-		--exclude-features performant         \
-		--exclude-features sql                \
-		--exclude-features streaming          \
-		--exclude-features test
-
diff --git a/crates/polars-io/Cargo.toml b/crates/polars-io/Cargo.toml
index 5587fbb55ef3..155dd328f2b9 100644
--- a/crates/polars-io/Cargo.toml
+++ b/crates/polars-io/Cargo.toml
@@ -25,6 +25,7 @@ chrono-tz = { workspace = true, optional = true }
 fast-float = { version = "0.2", optional = true }
 flate2 = { version = "1", features = ["zlib-ng"], optional = true, default-features = false }
 futures = { workspace = true, optional = true }
+home = { version = "0.5.4" }
 lexical = { version = "6", optional = true, default-features = false, features = ["std", "parse-integers"] }
 lexical-core = { version = "0.8", optional = true }
 memchr = { workspace = true }
@@ -41,9 +42,6 @@ simdutf8 = { version = "0.1", optional = true }
 tokio = { version = "1.26", features = ["net"], optional = true }
 url = { workspace = true, optional = true }
 
-[target.'cfg(not(target_family = "wasm"))'.dependencies]
-home = "0.5.4"
-
 [dev-dependencies]
 tempdir = "0.3.7"
 
diff --git a/crates/polars-io/src/utils.rs b/crates/polars-io/src/utils.rs
index ae15d7982152..e9785bf3c629 100644
--- a/crates/polars-io/src/utils.rs
+++ b/crates/polars-io/src/utils.rs
@@ -1,5 +1,6 @@
 use std::path::{Path, PathBuf};
 
+use home::home_dir;
 use polars_core::frame::DataFrame;
 use polars_core::prelude::*;
 
@@ -15,9 +16,7 @@ use crate::ArrowSchema;
 pub fn resolve_homedir(path: &Path) -> PathBuf {
     // replace "~" with home directory
     if path.starts_with("~") {
-        // home crate does not compile on wasm https://github.com/rust-lang/cargo/issues/12297
-        #[cfg(not(target_family = "wasm"))]
-        if let Some(homedir) = home::home_dir() {
+        if let Some(homedir) = home_dir() {
             return homedir.join(path.strip_prefix("~").unwrap());
         }
     }
diff --git a/crates/polars-utils/src/wasm.rs b/crates/polars-utils/src/wasm.rs
index 5f0293a4d3fe..412969deded9 100644
--- a/crates/polars-utils/src/wasm.rs
+++ b/crates/polars-utils/src/wasm.rs
@@ -5,14 +5,6 @@ impl Pool {
         rayon::current_num_threads()
     }
 
-    pub fn current_thread_index(&self) -> Option<usize> {
-        rayon::current_thread_index()
-    }
-
-    pub fn current_thread_has_pending_tasks(&self) -> Option<bool> {
-        None
-    }
-
     pub fn install<OP, R>(&self, op: OP) -> R
     where
         OP: FnOnce() -> R + Send,