Pypi existence check (#30)

* Add python_package_exists() function

* Poll pypi.org or compatible index to see if a package exists
* Returns non-zero on success

* Implements python_package_exists() in delivery_defer_packages()

* Implements python_package_exists() in delivery_defer_packages()

* Bugfix: Avoid incorrect package selection

* With large package lists that contain multiple packages starting with the same strstr() would pick the first match
* This adds a temporary name variable that strcmp() can check against.

* Message correction:

* Change "release" to "testing" in testing environment failure message

* Amend message to fit the flow of the output

* Disable outdated conda notifications

* The latest version isn't always the greatest. Don't give the end-user any ideas. Just use whatever the installer provides... quietly

* Rename python_package_exists to pip_index_provides

* Document the function prototype
* Add missing comments in micromamba structure

* Ensure the temporary output file does not linger

1 files changed, 13 insertions, 2 deletions

diff --git a/src/delivery.c b/src/delivery.c
index e69ce2f..524dd0a 100644
--- a/src/delivery.c
+++ b/src/delivery.c
@@ -1466,8 +1466,14 @@ void delivery_defer_packages(struct Delivery *ctx, int type) {
             struct Test *test = &ctx->tests[x];
             version = NULL;
 
+            char nametmp[1024] = {0};
+            if (spec_end != NULL && spec_begin != NULL) {
+                strncpy(nametmp, name, spec_begin - name);
+            } else {
+                strcpy(nametmp, name);
+            }
             // Is the [test:NAME] in the package name?
-            if (strstr(name, test->name)) {
+            if (!strcmp(nametmp, test->name)) {
                 // Override test->version when a version is provided by the (pip|conda)_package list item
                 guard_free(test->version);
                 if (spec_begin && spec_end) {
@@ -1498,7 +1504,12 @@ void delivery_defer_packages(struct Delivery *ctx, int type) {
                     }
                 }
 
-                ignore_pkg = 1;
+                if (DEFER_PIP == type && pip_index_provides(PYPI_INDEX_DEFAULT, name, version)) {
+                    fprintf(stderr, "(%s present on index %s): ", version, PYPI_INDEX_DEFAULT);
+                    ignore_pkg = 0;
+                } else {
+                    ignore_pkg = 1;
+                }
                 break;
             }
         }