From 1d0c8180880f023ef1f6b9e9d06c69139753bb1b Mon Sep 17 00:00:00 2001
From: Alex Bates <alex@nanaian.town>
Date: Sun, 21 Jan 2024 20:37:54 +0000
Subject: [PATCH] Use python iconv if system iconv is broken (#1156)

* use python iconv if system iconv is broken

* black
---
 tools/build/configure.py | 23 ++++++++++++++++++++++-
 tools/build/iconv.py     | 23 +++++++++++++++++++++++
 2 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100755 tools/build/iconv.py

diff --git a/tools/build/configure.py b/tools/build/configure.py
index f3d283c7d9..01f11783f3 100755
--- a/tools/build/configure.py
+++ b/tools/build/configure.py
@@ -357,6 +357,24 @@ def write_ninja_for_tools(ninja: ninja_syntax.Writer):
     ninja.build(CRC_TOOL, "cc_tool", f"{BUILD_TOOLS}/rom/n64crc.c")
 
 
+def does_iconv_work() -> bool:
+    # run iconv and see if it works
+    stdin = "エリア ＯＭＯ２＿１".encode("utf-8")
+
+    def run(command, stdin):
+        sub = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, input=stdin)
+        return sub.stdout
+
+    expected_stdout = run(["tools/build/iconv.py", "UTF-8", "CP932"], stdin)
+    actual_stdout = run(["iconv", "--from", "UTF-8", "--to", "CP932"], stdin)
+    return expected_stdout == actual_stdout
+
+
+use_python_iconv = not does_iconv_work()
+if use_python_iconv:
+    print("warning: iconv doesn't work, using python implementation")
+
+
 class Configure:
     def __init__(self, version: str):
         self.version = version
@@ -677,7 +695,10 @@ class Configure:
                 if version == "ique":
                     encoding = "EUC-JP"
 
-                iconv = f"iconv --from UTF-8 --to {encoding}"
+                if use_python_iconv:
+                    iconv = f"tools/build/iconv.py UTF-8 {encoding}"
+                else:
+                    iconv = f"iconv --from UTF-8 --to {encoding}"
 
                 # use tools/sjis-escape.py for src/battle/area/tik2/area.c
                 if version != "ique" and seg.dir.parts[-3:] == ("battle", "area", "tik2") and seg.name == "area":
diff --git a/tools/build/iconv.py b/tools/build/iconv.py
new file mode 100755
index 0000000000..55ed94730f
--- /dev/null
+++ b/tools/build/iconv.py
@@ -0,0 +1,23 @@
+#!/usr/bin/python3
+
+import argparse
+import sys
+
+parser = argparse.ArgumentParser(description="Convert a file from one encoding to another")
+parser.add_argument("f")
+parser.add_argument("t")
+parser.add_argument("infile", nargs="?", type=argparse.FileType("r"), default=sys.stdin)
+parser.add_argument("outfile", nargs="?", type=argparse.FileType("w"), default=sys.stdout)
+
+args = parser.parse_args()
+
+
+def main(args):
+    sys.stdin.reconfigure(encoding=args.f)
+    in_data = args.infile.read()
+    sys.stdout.reconfigure(encoding=args.t)
+    args.outfile.write(in_data)
+
+
+if __name__ == "__main__":
+    main(parser.parse_args())