git-for-windows docs

README.md

@@ -48,6 +48,28 @@ by adding the following to your .bashrc.
 source ${REPO_PATH}/gi-completion.sh
 ```
 
+### [Git for Windows](https://gitforwindows.org/)
+If you are running Git for Windows and do not have `make` available,
+first note that the default installation location of `/usr/local`
+cannot be used as it returns "permission denied". One alternative
+includes `PREFIX=$HOME`, assuming that Windows is configured with the
+appropriate environment variable; regardless, you must determine this
+destination and determine that you have permissions to create that
+path.
+
+If `install_gfw.sh` does not exist, then you can first create it with
+
+```
+sh sync-docs.sh
+```
+
+Using the determined installation destination for `PREFIX`, install
+using
+
+```
+PREFIX=... sh install_gfw.sh
+```
+
 ### Backward compatibility with the gi command
 For backward compatibility you can also use the original _gi_ command,
 by copying `gi.sh` to someplace in your path.

sync-docs.sh

@@ -31,6 +31,18 @@
 SCRIPT_NAME=git-issue.sh
 MAN_PAGE=git-issue.1
 
+sed -n \
+    -E '1,/^SYSCONFDIR/p; /^install:/,/^\S/ { /^\S/d; p; }' Makefile | \
+  sed -E '{
+    # remove Makefile leading no-echo @
+    s/^\s*@?// ;
+    # convert Makefile ?= conditional assignment to bash :-
+    s/^([^? ]+)\s*\?=\s*(.*)$/\1=${\1:-\2}/g ;
+    # convert $(VAR) to ${VAR}
+    s/\$\(([^)]+)\)/${\1}/g
+  }' > install_gfw.sh
+chmod +x install_gfw.sh
+
 # Update usage information in the script based on README.md
 {
   sed -n '1,/^The following commands are available:/p' $SCRIPT_NAME