CI: Use more efficient crates.io API endpoint (#282)

Instead of listing all versions, try to query the info about the respective version directly.

Author: phil-opp

scripts/ci-release.py

@@ -6,25 +6,26 @@
 crate_version = cargo_toml["package"]["version"]
 print("Detected crate version " + crate_version)
 
-api_url = "https://crates.io/api/v1/crates/x86_64/versions"
-crates_io_versions = requests.get(api_url).json()
+api_url = "https://crates.io/api/v1/crates/x86_64/" + crate_version
+released_version = requests.get(api_url).json()
 
-new_version = True
-for version in crates_io_versions["versions"]:
+if "version" in released_version:
+    version = released_version["version"]
     assert (version["crate"] == "x86_64")
-    if version["num"] == crate_version:
-        new_version = False
-        break
+    assert (version["num"] == crate_version)
+    print("Version " + crate_version + " already exists on crates.io")
 
-if new_version:
-    print("Could not find version " + crate_version + " on crates.io; creating a new release")
+else:
+    print("Could not find version " + crate_version +
+          " on crates.io; creating a new release")
 
     print("  Running `cargo publish`")
     subprocess.run(["cargo", "publish"], check=True)
 
     tag_name = "v" + crate_version
     print("  Tagging commit as " + tag_name)
-    sha = subprocess.run(["git", "rev-parse", "HEAD"], check=True, stdout=subprocess.PIPE).stdout.decode("utf-8").strip()
+    sha = subprocess.run(["git", "rev-parse", "HEAD"], check=True,
+                         stdout=subprocess.PIPE).stdout.decode("utf-8").strip()
     subprocess.run([
         "gh", "api", "/repos/rust-osdev/x86_64/git/refs",
         "-X", "POST", "-H", "Accept: application/vnd.github.v3+json",
@@ -33,5 +34,3 @@
     ])
 
     print("  Done")
-else:
-    print("Version " + crate_version + " already exists on crates.io")