abandon submodules

added a bash script that converts a project using gitsubmodules (ew) to a monorepo

Author: Travis Wagner

submodules-to-monorepo.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+###
+# converts a project with git submodules to a monorepo by importing all the
+# submodules into the main repository.
+#
+# gets submodule info from .gitmodules file and imports each submodule into
+# the main repository.
+###
+
+main() {
+    if [[ -f .gitmodules ]]; then
+        # make sure the .gitmodules file is not empty
+        if [[ ! -s .gitmodules ]]; then
+            echo ".gitmodules file is empty. nothing to do. exiting..."
+        else
+            echo "found .gitmodules file. attempting to convert to monorepo..."
+            convert
+        fi
+    else
+        echo "mo .gitmodules file found. exiting..."
+    fi
+}
+
+convert() {
+    # read each submodule from .gitmodules file
+    while read -r i; do
+        if [[ $i == \[submodule* ]]; then
+            read -r i # next line is the path
+            path=$(echo "$i" | cut -d'=' -f2 | xargs)
+            read -r i # next line is the url
+            url=$(echo "$i" | cut -d'=' -f2 | xargs)
+            # if path equals "src/llvm-project", skip it
+            if [[ $path == "src/llvm-project" ]]; then
+                echo "skipping LLVM submodule..."
+                continue
+            fi
+            echo "converting $path from $url..."
+            # deinitialize and remove the submodule
+            git submodule deinit -f "$path" >/dev/null 2>&1 || fail "failed to deinit $path"
+            rm -rf .git/modules/"$path"
+            git rm -f "$path" >/dev/null 2>&1 || fail "failed to remove $path"
+            # clone the submodule and remove its .git directory
+            git clone "$url" "$path" >/dev/null 2>&1 || fail "failed to clone $url"
+            rm -rf "$path"/.git
+            # add the submodule files and commit
+            git add "$path" >/dev/null 2>&1 || fail "failed to add $path with git"
+            msg="imported $path into main repository"
+            echo "$msg"
+            git commit -m "$msg" >/dev/null 2>&1 || fail "failed to commit $path"
+            echo "successfully converted $path."
+        fi
+    done <.gitmodules
+}
+
+fail() {
+    printf '%s\n' "$1" >&2
+    exit "${2-1}"
+}
+
+try_and_continue() {
+    $1 || echo "command failed: $1, continuing..."
+}
+
+main "$@" && echo "converted to monorepo successfully."