Fix install on Windows

.github/workflows/wheels.yml

@@ -68,7 +68,7 @@ jobs:
 
 
   build-wheels:
-    name: Build ${{ matrix.only }}
+    name: build ${{ matrix.only }}
     needs: build-wheels-matrix
     runs-on: ${{ matrix.os }}
 

add_libmagic.sh

@@ -6,17 +6,19 @@ install_source() {
     # install from source
     # https://www.darwinsys.com/file/
     # https://github.com/file/file/blob/FILE5_45/INSTALL#L51
-    version="file-5.45" &&
-    tmpfile="$(mktemp)" &&
-    curl -sSLo "${tmpfile}" "https://astron.com/pub/file/${version}.tar.gz" &&
-    tar xvf "${tmpfile}" &&
-    cd "${version}" &&
-    ./configure &&
-    make &&
-    make install &&
-    make installcheck &&
-    cd .. &&
-    rm -r "${version}"
+    (
+        version="file-5.45" &&
+        tmpfile="$(mktemp)" &&
+        curl -sSLo "${tmpfile}" "https://astron.com/pub/file/${version}.tar.gz" &&
+        tar xvf "${tmpfile}" &&
+        cd "${version}" &&
+        ./configure &&
+        make &&
+        make install &&
+        make installcheck &&
+        cd .. &&
+        rm -r "${version}"
+    ) || ( cd .. && false )
 }
 
 install_precompiled() {
@@ -37,6 +39,7 @@ install_precompiled() {
     else
         # windows (no install, just download into current working directory)
         # could also consider install using `pacman`: https://packages.msys2.org/base/mingw-w64-file
+        # which would require an update of copy_libmagic below to account for new magic.mgc paths
         python <<EOF
 import platform, sysconfig, io, zipfile, urllib.request
 assert platform.system() == "Windows"
@@ -56,7 +59,7 @@ copy_libmagic() {
     # this python command relies on current working directory containing `./magic/loader.py`
     libmagic_path="$(python -c 'from magic.loader import load_lib; print(load_lib()._name)')" &&
     cp "${libmagic_path}" "magic" &&
-    # only on linux: additionally copy compiled db into magic dir (prefer the one installed by install_source)
+    # only on linux/macos: additionally copy compiled db into magic dir (prefer the one installed by install_source)
     ( ( cp "/usr/local/share/misc/magic.mgc" "magic" || cp "/usr/share/misc/magic.mgc" "magic" ) || true ) &&
     # check what was copied
     ls -ltra magic