Clean up everything.

* More efficient.
* More readable.
* Errors are reported to the user.

src/cgi.cpp

@@ -46,41 +46,30 @@ using std::vector;
 entry_type parse_formdata()
 {
     entry_type entry;
-    try
-    {
-        cgicc::Cgicc cgi;
-        entry.instance = cgi("instance");
-        entry.tags = string_to_vector(cgi("tags"));
-        entry.receipts = string_to_vector(cgi("receipts"));
-        entry.description = cgi("description");
 
-        const auto screenshot = cgi.getFile("screenshot");
-        if (screenshot != cgi.getFiles().end())
+    cgicc::Cgicc cgi;
+    entry.instance = cgi("instance");
+    entry.tags = string_to_vector(cgi("tags"));
+    entry.receipts = string_to_vector(cgi("receipts"));
+    entry.description = cgi("description");
+
+    const auto screenshot = cgi.getFile("screenshot");
+    if (screenshot != cgi.getFiles().end())
+    {
+        constexpr size_t size_limit{1024 * 1024 * 2}; // 2 MiB.
+        if (screenshot->getDataLength() > size_limit)
         {
-            constexpr size_t size_limit{1024 * 1024 * 2}; // 2 MiB.
-            if (screenshot->getDataLength() > size_limit)
-            {
-                throw runtime_error{"Filesize too big"};
-            }
-
-            string filepath{files::get_tmpdir() / screenshot->getFilename()};
-            ofstream file{filepath, ios::binary};
-            if (file.good())
-            {
-                screenshot->writeToStream(file);
-                entry.screenshot_filepath = filepath;
-            }
-            else
-            {
-                throw runtime_error{"Could not open temporary file: "
-                                    + filepath};
-            }
+            throw runtime_error{"Filesize too big"};
         }
-    }
-    catch (const exception &e)
-    {
-        cerr << e.what() << '\n';
-        // TODO: Make errors visible to the user in a helpful way.
+
+        const string filepath{files::get_tmpdir() / screenshot->getFilename()};
+        ofstream file{filepath, ios::binary};
+        if (!file.good())
+        {
+            throw runtime_error{"Could not open temporary file: " + filepath};
+        }
+        screenshot->writeToStream(file);
+        entry.screenshot_filepath = filepath;
     }
 
     return entry;
@@ -90,7 +79,7 @@ vector<string> string_to_vector(const string_view str)
 {
     vector<string> vec;
 
-    stringstream input(str.data());
+    stringstream input{str.data()};
     string element;
 
     while (getline(input, element, ','))

src/files.cpp

@@ -76,7 +76,7 @@ fs::path get_datadir()
         auto path{fs::path(env)};
 #if defined(__linux__)
         path /= ".local/share/fediblock-backend";
-#elif defined(__unix__)
+#else
         path /= ".fediblock-backend";
 #endif
         fs::create_directories(path);
@@ -97,7 +97,7 @@ string get_access_token()
     stringstream ss;
     ss << file.rdbuf();
 
-    return ss.str().substr(0, ss.str().find('\n'));
+    return ss.str().substr(0, ss.str().find('\n')); // Remove trailing newline.
 }
 
 } // namespace FediBlock::files

src/files.hpp

@@ -26,13 +26,13 @@ namespace FediBlock::files
 
 using std::string;
 
-// Creates and returns the temporary directory.
+// Create and return the temporary directory.
 [[nodiscard]] fs::path get_tmpdir();
 
 // Remove the temporary directory. Throws runtime_error on error.
 void remove_tmpdir();
 
-// Returns the data directory and creates it if necessary.
+// Return the data directory and create it if necessary.
 [[nodiscard]] fs::path get_datadir();
 
 // Read and return access token.

src/git.cpp

@@ -43,13 +43,13 @@ namespace FediBlock::git
 
 using std::ofstream;
 using std::runtime_error;
-using std::stoull;
 using std::string;
 using std::string_view;
 using std::to_string;
 using std::uint64_t;
 
 git_repository *_repo{nullptr};
+constexpr string_view _clone_url{"git@schlomp.space:FediBlock/data.git"};
 
 void check(int error)
 {
@@ -64,23 +64,24 @@ int cred_acquire(git_cred **cred, const char * /*url*/,
                  const char *username_from_url, unsigned int /*allowed_types*/,
                  void * /*payload*/)
 {
-    return git_credential_ssh_key_new(
-        cred, username_from_url, (files::get_datadir() / "ssh_id.pub").c_str(),
-        (files::get_datadir() / "ssh_id").c_str(), nullptr);
+    const auto datadir{files::get_datadir()};
+
+    return git_credential_ssh_key_new(cred, username_from_url,
+                                      (datadir / "ssh_id.pub").c_str(),
+                                      (datadir / "ssh_id").c_str(), nullptr);
 }
 
 void clone()
 {
     git_clone_options options = GIT_CLONE_OPTIONS_INIT;
     options.fetch_opts.callbacks.credentials = cred_acquire;
-    check(git_clone(&_repo, "git@schlomp.space:FediBlock/data.git",
+    check(git_clone(&_repo, _clone_url.data(),
                     (files::get_tmpdir() / "repo").c_str(), &options));
 }
 
 void create_branch()
 {
-    const auto id{gitea::get_last_pr_number() + 1};
-    const string branch_name = "web-" + std::to_string(id);
+    const string branch_name{get_branch_name()};
     const string ref_name{"refs/heads/" + branch_name};
     git_oid oid_parent;
     git_commit *commit;
@@ -101,14 +102,12 @@ void create_branch()
 void commit(const cgi::entry_type &entry)
 {
     // Write files.
-    const auto id{gitea::get_last_pr_number() + 1};
-    const string basename{files::get_tmpdir() / "repo"
-                          / ("web-" + to_string(id))};
+    const string basename{files::get_tmpdir() / "repo" / get_branch_name()};
 
     ofstream file(basename + ".json");
     if (!file.good())
     {
-        throw; // FIXME
+        throw runtime_error{"Could not create file: " + basename + ".json"};
     }
     file << json::to_json(entry);
     file.close();
@@ -158,15 +157,15 @@ void commit(const cgi::entry_type &entry)
     git_index_free(index);
     git_signature_free(sig);
     git_tree_free(tree);
+    git_object_free(parent);
+    git_reference_free(ref);
 }
 
 void push()
 {
     git_push_options options;
     git_remote *remote{nullptr};
-    const string branch_name{"web-"
-                             + std::to_string(gitea::get_last_pr_number() + 1)};
-    string refspec_str{("refs/heads/" + branch_name)};
+    string refspec_str{("refs/heads/" + get_branch_name())};
     char *refspec = &refspec_str[0];
     const git_strarray refspecs = {&refspec, 1};
 
@@ -175,6 +174,14 @@ void push()
     options.callbacks.credentials = cred_acquire;
 
     check(git_remote_push(remote, &refspecs, &options));
+
+    git_remote_free(remote);
+}
+
+string get_branch_name()
+{
+    const auto id{gitea::get_last_pr_number() + 1};
+    return "web-" + to_string(id);
 }
 
 } // namespace FediBlock::git

src/git.hpp

@@ -22,13 +22,15 @@
 #include <git2.h>
 
 #include <cstdint>
+#include <string>
 
 namespace FediBlock::git
 {
 
+using std::string;
 using std::uint64_t;
 
-// Throws runtime_error on error.
+// Throw runtime_error on error.
 void check(int error);
 
 // Acquire credentials for SSH.
@@ -48,6 +50,9 @@ void commit(const cgi::entry_type &entry);
 // Push the new commit.
 void push();
 
+// Get the name of the branch we use.
+string get_branch_name();
+
 } // namespace FediBlock::git
 
 #endif // FEDIBLOCK_BACKEND_GIT_HPP

src/gitea.cpp

@@ -38,6 +38,8 @@ using std::to_string;
 CURL *_connection;
 string _curl_buffer_body;
 uint64_t _last_pr_number{0};
+constexpr string_view _forge_baseurl{"https://schlomp.space"};
+constexpr string_view _repo_name{"FediBlock/data"};
 
 void init()
 {
@@ -65,7 +67,6 @@ void init()
         throw runtime_error{"Could not add headers"};
     }
 
-    // Write the body into the void.
     // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
     curl_easy_setopt(_connection, CURLOPT_WRITEFUNCTION, writer_body);
 }
@@ -91,7 +92,7 @@ string api_request(const http_method method, const string_view path,
                    const string_view body)
 {
     CURLcode code;
-    string url{string("https://schlomp.space") += path};
+    string url{string(_forge_baseurl) += path};
     _curl_buffer_body.clear();
 
     switch (method)
@@ -106,7 +107,6 @@ string api_request(const http_method method, const string_view path,
     }
     case http_method::POST:
     {
-        // Prepare body to send.
         // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
         curl_easy_setopt(_connection, CURLOPT_POSTFIELDSIZE, body.size());
         // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
@@ -145,7 +145,8 @@ string api_request(const http_method method, const string_view path,
 
 void pull_request(const string_view branch, const cgi::entry_type &entry)
 {
-    api_request(http_method::POST, "/api/v1/repos/FediBlock/data/pulls",
+    api_request(http_method::POST,
+                (string("/api/v1/repos/") += _repo_name) += "/pulls",
                 json::pull_request_body(branch, entry));
     ++_last_pr_number;
 }

src/json.hpp

@@ -31,6 +31,7 @@ using std::string_view;
 // Convert an entry_type into a JSON string.
 [[nodiscard]] string to_json(const cgi::entry_type &entry);
 
+// Return the body for a pull request.
 [[nodiscard]] string pull_request_body(string_view branch,
                                        const cgi::entry_type &entry);
 

src/main.cpp

@@ -50,12 +50,11 @@ int main()
         git::commit(entry);
         git::push();
 
-        gitea::pull_request("web-" + to_string(gitea::get_last_pr_number() + 1),
-                            entry);
+        gitea::pull_request(git::get_branch_name(), entry);
 
         cout << "Created pull request: <"
              << "https://schlomp.space/FediBlock/data/pulls/"
-             << gitea::get_last_pr_number() << ">\r\n";
+             << gitea::get_last_pr_number() << ">.\r\n";
 
         files::remove_tmpdir();
     }
@@ -63,6 +62,8 @@ int main()
     {
         cerr << e.what() << '\n';
         cout << "An error happened: " << e.what() << "\r\n";
+        cout << "Please report it at "
+                "<https://schlomp.space/FediBlock/backend/issues>.\r\n";
     }
 
     gitea::cleanup();