added subcommands structure

rtenets

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # Author: Lucas Frérot
 # Affiliation:
-#     Sorbonne Université, CNRS, Institut Jean Le Rond d’Alembert,
+#     Sorbonne Université, CNRS, Institut Jean Le Rond d'Alembert,
 #     F-75005 Paris, France
 #
 # Copyright © 2024  Lucas Frérot
@@ -35,7 +35,7 @@ readonly NC='\033[0m'
 readonly ENDPOINT="https://git.dalembert.upmc.fr/api/v1"
 
 # Lab info
-readonly AFFILIATION="Sorbonne Université, CNRS, Institut Jean Le Rond d’Alembert, F-75005 Paris, France"
+readonly AFFILIATION="Sorbonne Université, CNRS, Institut Jean Le Rond d'Alembert, F-75005 Paris, France"
 
 # ----------------- Logging commands -----------------------
 
@@ -104,17 +104,17 @@ get_gitea_token(){
     else
         TOKEN="$(enter "gitea token: ")"
     fi
-    readonly TOKEN
 }
 
 gitea() {
     check_api_prerequisites
-    readonly TOKEN
 
     if ! is_set TOKEN; then
         get_gitea_token
     fi
 
+    readonly TOKEN
+
     local method="$1"
     local request="$2"
     local data=""
@@ -172,6 +172,8 @@ init_repo() {
     \git init
 }
 
+# ----------------- Tree commands -----------------------
+
 # Make bash script stub
 script_stub() {
     local script_name="$1"
@@ -263,6 +265,8 @@ create_tenet_file_tree() {
     script_stub make_all_figures "Generating figures..."
 }
 
+# ----------------- Gitea commands -----------------------
+
 get_gitea_owner() {
     gitea /user GET | jq -r '.login'
 }
@@ -327,9 +331,25 @@ setup_dalembert_gitea() {
     setup_software_heritage_hook "${owner}" "${repo_name}" "${remote_http}"
 }
 
+# ----------------- Script subcommands commands -----------------------
+
+init-tree() {
+    declare desc="usage: rtenets init-tree <directory>"
+
+    local directory="$1"
+}
+
+init-gitea() {
+    true
+}
+
+init-workflow() {
+    true
+}
 
 # Create git repository
-create_repo() {
+create() {
+    declare desc="usage: rtenets create <directory>"
     local repo_name="$1"
     info "recursively creating directory '${repo_name}'"
     mkdir -p "${repo_name}"
@@ -338,19 +358,70 @@ create_repo() {
         cd "${repo_name}"
         init_repo
         create_tenet_file_tree
+        setup_dalembert_gitea
     )
 }
 
 # Print usage and exit
 usage() {
-    true
+    cat <<USAGE
+usage: $0 [--help,-h] [--version] command [args...]
+
+Available commands:
+    - create: create and populate a repository
+    - init-tree: populate a repository with README, AUTHORS, COPYING and test/
+    - init-gitea: setup a remote on a gitea server with SoftwareHeritage hook
+    - init-workflow: setup a Python virtual environment and Snakemake template
+    - check: verify tenent compliance for a repository
+USAGE
+}
+
+version() {
+    cat <<VERSION
+rtenets 0.0.1
+
+Copyright © 2024 Lucas Frérot
+This program comes with ABSOLUTELY NO WARRANTY;
+This is free software, and you are welcome to redistribute it
+under certain conditions;
+VERSION
 }
 
 main() {
-    check_git_config
-    create_tenet_file_tree
+    local other_args=()
+    local help_mode=0
+    for i in "$@"; do
+        case $i in
+            -v|--version)
+                version
+                return 0
+                ;;
+            -h|--help)
+                help_mode=1
+                ;;
+            *)
+                other_args+=("${i}")
+                ;;
+        esac
+    done
 
-    gitea /user GET
+    local command="${other_args[0]}"
+
+    if [[ "${help_mode}" == 1 ]]; then
+        type "${command}" | sed -n -e 's/^.*declare desc="\(.*\)";/\1/p'
+    fi
+
+    # Subcommands trick
+    # https://blogsh.github.io/2020/03/21/subcommands-in-bash-scripts.html
+    declare -A COMMANDS=(
+        [default]=usage
+        [init-tree]=init-tree
+        [init-gitea]=init-gitea
+        [init-workflow]=init-workflow
+        [create]=create
+    )
+
+    "${COMMANDS[${command:-default}]:-${COMMANDS[default]}}" "${other_args}"
 }
 
 main "$@"