Micromamba improvement (#148)HEAD1.7.0master

* Update micromamba installation logic

* Split installation from micromamba() into micromamba_install()
* Return -1 when micromamba cannot be installed
* Add stasis.ini option "indexer.micromamba_download_url"
* Add global variable micromamba_download_url
* The installation function attempts two known-good URLs by default
*

* Add indexer arugment '--micromamba-download-url'

* Add is_file_compressed() function to utils
* Call micromamba_install() from tests

* Add space in usage statement

* Fix usage output when option array contains arguments without short options

* Add --micromamba-download-url to README.md

1 files changed, 13 insertions, 5 deletions

diff --git a/src/cli/stasis_indexer/args.c b/src/cli/stasis_indexer/args.c
index 0d0e9b9..440c671 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,
 };
 
@@ -26,17 +28,23 @@ void usage(char *name) {
         SYSERROR("Unable to allocate memory for options array");
         exit(1);
     }
-    for (int i = 0; i < maxopts; i++) {
-        opts[i] = (char) long_options[i].val;
+    for (int i = 0, n = 0; i < maxopts; i++) {
+        if (isalnum(long_options[i].val)) {
+            opts[n] = (char) long_options[i].val;
+            n++;
+        }
     }
-    printf("usage: %s [-%s] {{STASIS_ROOT}...}\n", name, opts);
+    printf("usage: %s [-%s] {{STASIS_ROOT} ...}\n", name, opts);
     guard_free(opts);
 
     for (int i = 0; i < maxopts - 1; i++) {
         char line[255] = {0};
-        snprintf(line, sizeof(line), "  --%s  -%c  %-20s", long_options[i].name, long_options[i].val, long_options_help[i]);
+        snprintf(line, sizeof(line), "  --%s  %s%c  %s",
+            long_options[i].name,
+            isalnum(long_options[i].val) ? "-" : "",
+            isalnum(long_options[i].val) ? long_options[i].val : ' ',
+            long_options_help[i]);
         puts(line);
     }
 
 }
-