Add a script to upate lego in all web repos

Closes #47

update-lego.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+# TODO: add help text so the user knows what the script does
+# TODO: add a dry-run option so the user can see what's happening without actually pushing
+# TODO: cut down on script output so the user can actually read it without a wall of git output
+
+set -eu
+
+# list of directories to act on
+# to make this script update a new lektor site, add its repo name here
+LEGO_WEB_DIRECTORIES=(
+    community
+    dev
+    donate-static
+    gettor-web
+    manual
+    newsletter
+    styleguide
+    support
+    template
+    tpo
+)
+
+declare -a success_dirs  # list the directories that successfully updated at the end of the script
+declare -a error_dirs  # list the directories that failed to update
+
+# this is the parent of the directory the script resides in
+web_repos_dir=$(readlink -f -- "$0" | rev | cut -f 3- -d / | rev)
+
+latest_commit_hash=$(git -C "$web_repos_dir/lego" log --oneline -1 origin/main|awk '{print $1;}')
+
+for web_dir in ${LEGO_WEB_DIRECTORIES[@]}; do
+    repo_dir="$web_repos_dir/$web_dir"
+
+    # HACK: if any of the statements in the parentheses fail, the directory is added to error_dirs
+    # else, it's added to success_dirs
+
+    # MICRO-OP: using `git -C` lets us set the git working directory without changing the *actual*
+    # working directory, which can be error prone
+    ( \
+        git -C "$repo_dir" checkout -b update-lego-$latest_commit_hash origin/main && \
+        git -C "$repo_dir/lego" pull origin main && \
+        git -C "$repo_dir" add "$repo_dir/lego" && \
+        git -C "$repo_dir" commit -m 'Update lego to latest commit `'$latest_commit_hash'`' && \
+        git -C "$repo_dir" push origin update-lego-$latest_commit_hash && \
+        success_dirs+=("$web_dir")
+    ) || error_dirs+=("$web_dir")
+done
+
+# if $success_dirs and $error_dirs are empty, the end of the script exits abnormally
+set +u
+
+# BUG: this didn't fire during my testing for some reason
+# so i'm commenting out the `if` in case the length check is the issue
+#if [[ ${#success_dirs[@]} -gt 0 ]]; then
+    echo -e '\033[0;mSucceeded:\033[0;32m'
+    for dir_name in ${success_dirs[@]}; do
+        printf "\t%s:\thttps://gitlab.torproject.org/tpo/web/%s/-/merge_requests/new?merge_request%5Bsource_branch%5D=%s\n" "$dir_name" "$dir_name" update-lego-$latest_commit_hash
+    done
+#fi
+
+
+if [[ ${#error_dirs[@]} -gt 0 ]]; then
+    echo -e '\033[1;31mERRORED:'
+    for dir_name in ${error_dirs[@]}; do
+        echo $dir_name
+    done
+    printf '\033[0m'
+    exit 1
+fi