Add generator script for wslgit.sh. Update README.

README.md

@@ -10,14 +10,9 @@ But why do I re-implement it by scripts, because I hope the wslgit tools could s
 ## Usage
 
 1. Please ensure `git` is installed in your WSL.
-2. Copy `wslgit.sh` to the `/usr/bin/` directory in your WSL.
-3. Add the following config into yout VSCode Settings (Remember to replace the path)
-
-``` json
-{
-	"git.path": "C:\\path\\to\\git.bat"
-}
-```
+2. Copy `wslgit.sh` to the `/usr/bin/` or `~/bin` directory in your WSL.
+3. Add the following config into your VSCode Settings.
+	- `{ "git.path": "C:\\path\\to\\git.bat" }`
 
 ### 🐢 Feeling slowly? (Disable interactive shell)
 

scripts/gen-wslgit-sh.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+# ===========================================
+#  This script is used for generating
+#    `wslgit.sh` from `wslgit.dev.sh`.
+#  And this script will remove its comments,
+#    log logic and debug logic.
+# ===========================================
+
+INPUT="wslgit.dev.sh";
+OUTPUT="wslgit.sh";
+
+throw() { echo -e "fatal: $1"; exit 1; }
+
+cd "$( dirname "${BASH_SOURCE[0]}" )/.." || throw "goto project directory failed!";
+[[ -n "$(which gawk)" ]] || throw "gawk is not installed!";
+[[ -f "$INPUT" ]] || throw "${INPUT} is not a file!";
+
+AWK_REMOVE_LOG='
+	BEGIN { keep_line=1; }
+	/#region[ \t]+log/ { keep_line=0; next; }
+	/#endregion[ \t]+log/ { keep_line=1; next; }
+	/WSLGIT_SH_LOG/ { next; }
+	keep_line { print; }
+';
+
+AWK_REMOVE_COMMENTS='
+	BEGIN { keep_line=0; }
+	/^#!/ { print; next; } # keep shebang comment
+	keep_line==1 { print; }
+	/^[ \t]*#[ \t]+[=]+/ { if(!keep_line) print; keep_line++; next; }
+	/^[ \t]*#/ { next; }
+	{ print; }
+'
+
+AWK_REMOVE_MUTLIPLE_EMPTY_LINES='
+	/^$/ { i++; if(i>=2) next; }
+	!/^$/ { i=0; }
+	{ print; }
+';
+
+AWK_ADD_WARNING='
+	function warning(info) { print "# WARNING: " info; }
+	NR == 3 {
+		warning("DO NOT EDIT THIS FILE MANUALLY!");
+		warning("Because This file is generated from '$INPUT' by ./script/gen-wslgit-sh.sh");
+		print("");
+	}
+	{ print; }
+'
+
+
+cat "$INPUT" |
+	gawk "$AWK_REMOVE_LOG" |
+	gawk "$AWK_REMOVE_COMMENTS" |
+	gawk "$AWK_REMOVE_MUTLIPLE_EMPTY_LINES" |
+	gawk "$AWK_ADD_WARNING" \
+	> "$OUTPUT" || throw "generate failed!";
+
+echo "success: ${INPUT} -> ${OUTPUT}";

wslgit.sh

@@ -0,0 +1,116 @@
+#!/usr/bin/env bash
+
+# WARNING: DO NOT EDIT THIS FILE MANUALLY!
+# WARNING: Because This file is generated from wslgit.dev.sh by ./script/gen-wslgit-sh.sh
+
+# =========================================
+#  Name:    wslgit.sh
+#  Update:  2019-06-01
+#  License: GPL-3.0
+#  Author:  Liu Yue ([email protected])
+#
+#  Description:
+#    Convert the Windows path contained in the arguments to Linux(WSL) path,
+#       and convert the Linux(WSL) path in output of git to Windows path.
+#    This script use `mount` command, awk scripts to implement above features.
+#       I retained the implementation via `wslpath` codes in this script for
+#       reference purposes only. (because wslpath has some shortcomings to
+#       implement it)
+# ==========================================
+
+AWK="$(which gawk)";
+[[ -z "$AWK" ]] && AWK="$(which awk)";
+[[ -z "$AWK" ]] && echo "fatal: \"awk\" is not installed in WSL!" >&2 && exit 1;
+
+function get_mounted_drvfs() {
+	mount -t drvfs | "$AWK" '
+	function trim(s) { gsub(/^[ \t]+/, "", s); gsub(/[ \t]+$/, "", s); return s; }
+	{
+		if(split($0, lr, "type drvfs") < 2) next;
+		if(split(lr[1], part, "on") < 2) next;
+
+		drive = trim(substr(part[1],1,2));
+		mount_to = trim(part[2]);
+
+		print toupper(drive) "\n" mount_to;
+	}';
+}
+MOUNTED_DRVFS="$(get_mounted_drvfs)";
+
+function to_unix_path_by_wslpath() {
+	local unix_path;
+	unix_path="$(wslpath "$1" 2>/dev/null)"; # empty output means it is not a Linux path
+	[[ -n "$unix_path" ]] && printf "%s" "$unix_path" || printf "%s" "$1";
+}
+function to_win_path_by_wslpath() {
+	local win_path;
+	win_path="$(wslpath -w "$1" 2>/dev/null)"; # empty output means it is not a Linux path
+	[[ -n "$win_path" ]] && printf "%s" "$win_path";
+}
+
+function to_unix_path_by_awk() {
+	printf "%s" "$1"  |
+		"$AWK" -v _mount="$MOUNTED_DRVFS" 'BEGIN { mount_len = split(_mount, mount_list, "\n"); }
+		{
+			if(index($0, ":\\") == 2) {
+				driver = toupper(substr($0, 1, 2));
+				for(i = 1; i <= mount_len ; i += 2 ) {
+					if(driver != mount_list[i]) continue;
+					suffix = substr($0, 3); gsub(/\\/, "/", suffix); gsub("//", "/", suffix);
+					print mount_list[i+1] suffix;
+					exit;
+				}
+			}
+			print $0;
+			exit;
+		}';
+}
+function to_win_path_by_awk() {
+	"$AWK" -v _mount="$MOUNTED_DRVFS" 'BEGIN { mount_len = split(_mount, mount_list, "\n"); }
+		{
+			for(i = 1; i <= mount_len ; i += 2 ) {
+				if(sub(mount_list[i+1], mount_list[i]) > 0) {
+					gsub("/", "\\");
+					break;
+				}
+			}
+			print $0;
+		}';
+}
+
+if [[ -n "$WSLGIT_SH_CWD" ]]; then
+	correct_cwd="$(to_unix_path_by_awk "$WSLGIT_SH_CWD")";
+	cd "$correct_cwd";
+	[[ "$?" != 0 ]] && echo "fatal: can not cd to ${WSLGIT_SH_CWD} ($correct_cwd)" >&2 && exit 1;
+fi
+
+argv=0;
+convert_output=false;
+after_double_dash=false;
+for arg in "$@"; do
+	if [[ "$after_double_dash" != true ]]; then
+		if [[ "$arg" == "rev-parse" ]] || [[ "$arg" == "remote" ]] || [[ "$arg" == "init" ]]; then
+			convert_output=true;
+		fi
+		if [[ "$arg" == --*=* ]]; then
+			prefix="${arg%%=*}";
+			file_path="${arg#*=}";
+			git_args[$argv]="${prefix}=$(to_unix_path_by_awk "$file_path")";
+			argv=$(($argv+1));
+			continue;
+		fi
+	fi
+	[[ "$arg" == "--" ]] && after_double_dash=true;
+
+	git_args[$argv]="$(to_unix_path_by_awk "$arg")";
+	argv=$(($argv+1));
+done
+
+function execut_git() { git "${git_args[@]}" <&0; return $?; }
+if [[ "$convert_output" == true ]]; then
+	execut_git | to_win_path_by_awk;
+else
+	execut_git;
+fi
+
+exit $?;