4 files changed, 19 insertions, 0 deletions
diff --git a/src/cli/stasis_indexer/args.c b/src/cli/stasis_indexer/args.c
index 0d0e9b9..ccc69e6 100644
--- a/src/cli/stasis_indexer/args.c
+++ b/src/cli/stasis_indexer/args.c
@@ -7,6 +7,7 @@ struct option long_options[] = {
     {"verbose", no_argument, 0, 'v'},
     {"unbuffered", no_argument, 0, 'U'},
     {"web", no_argument, 0, 'w'},
+    {"micromamba-download-url", required_argument, 0, OPT_MICROMAMBA_DOWNLOAD_URL},
     {0, 0, 0, 0},
 };
 
@@ -16,6 +17,7 @@ const char *long_options_help[] = {
     "Increase output verbosity",
     "Disable line buffering",
     "Generate HTML indexes (requires pandoc)",
+    "Set micromamba download URL",
     NULL,
 };
 
diff --git a/src/cli/stasis_indexer/helpers.c b/src/cli/stasis_indexer/helpers.c
index bdb538d..b89622b 100644
--- a/src/cli/stasis_indexer/helpers.c
+++ b/src/cli/stasis_indexer/helpers.c
@@ -157,6 +157,7 @@ int micromamba_configure(const struct Delivery *ctx, struct MicromambaInfo *m) {
     m->conda_prefix = globals.conda_install_prefix;
     m->micromamba_prefix = micromamba_prefix;
     m->download_dir = ctx->storage.tmpdir;
+    m->download_url = globals.micromamba_download_url;
 
     const size_t pathvar_len = strlen(getenv("PATH")) + strlen(m->micromamba_prefix) + strlen(m->conda_prefix) + 3 + 4 + 1;
     // ^^^^^^^^^^^^^^^^^^
diff --git a/src/cli/stasis_indexer/include/args.h b/src/cli/stasis_indexer/include/args.h
index 543aa4b..080863c 100644
--- a/src/cli/stasis_indexer/include/args.h
+++ b/src/cli/stasis_indexer/include/args.h
@@ -3,6 +3,8 @@
 
 #include <getopt.h>
 
+#define OPT_MICROMAMBA_DOWNLOAD_URL 1000
+
 extern struct option long_options[];
 void usage(char *name);
 
diff --git a/src/cli/stasis_indexer/stasis_indexer_main.c b/src/cli/stasis_indexer/stasis_indexer_main.c
index c13d175..5d86f29 100644
--- a/src/cli/stasis_indexer/stasis_indexer_main.c
+++ b/src/cli/stasis_indexer/stasis_indexer_main.c
@@ -197,6 +197,13 @@ int main(const int argc, char *argv[]) {
             case 'w':
                 do_html = 1;
                 break;
+            case OPT_MICROMAMBA_DOWNLOAD_URL:
+                globals.micromamba_download_url = strdup(optarg);
+                if (!globals.micromamba_download_url) {
+                    SYSERROR("unable to allocate memory for micromamba_download_url");
+                    exit(1);
+                }
+                break;
             case '?':
             default:
                 exit(1);
@@ -326,6 +333,13 @@ int main(const int argc, char *argv[]) {
         SYSWARN("Unable to open stasis configuration file: %s", cfg_path);
     }
 
+    if (globals.micromamba_download_url && isempty(globals.micromamba_download_url)) {
+        // safeguard against supplying a zero-length URL
+        // this covers the case where the user supplied it as an argument and/or in the config file
+        SYSERROR("micromamba download URL cannot be empty");
+        exit(1);
+    }
+
     indexer_init_dirs(&ctx, workdir);
 
     msg(STASIS_MSG_L1, "%s delivery root %s\n",