From a2a39cb2287a29767fa3bc98d05f01430c668362 Mon Sep 17 00:00:00 2001
From: Elis Eriksson <spelis.tech@gmail.com>
Date: Thu, 26 Mar 2026 19:08:03 +0100
Subject: slight changes, idk how to write proper commit messages hehe

---
 lang.c | 169 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 169 insertions(+)
 create mode 100644 lang.c

(limited to 'lang.c')

diff --git a/lang.c b/lang.c
new file mode 100644
index 0000000..c828be2
--- /dev/null
+++ b/lang.c
@@ -0,0 +1,169 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
+#include "cgit.h"
+#include "html.h"
+#include "ui-shared.h"
+#include "ui-tree.h"
+#include <string.h>
+#include <sys/stat.h>
+
+/* Mapping of file extensions to languages */
+struct lang_extension {
+  const char *ext;
+  const char *lang;
+};
+
+static const struct lang_extension lang_map[] = {{"c", "C"},
+                                                 {"h", "C"},
+                                                 {"js", "JavaScript"},
+                                                 {"jsx", "JavaScript"},
+                                                 {"py", "Python"},
+                                                 {"go", "Go"},
+                                                 {"rs", "Rust"},
+                                                 {"rb", "Ruby"},
+                                                 {"java", "Java"},
+                                                 {"ts", "TypeScript"},
+                                                 {"tsx", "TypeScript"},
+                                                 {"cpp", "C++"},
+                                                 {"cc", "C++"},
+                                                 {"cxx", "C++"},
+                                                 {"cs", "C#"},
+                                                 {"php", "PHP"},
+                                                 {"sh", "Shell"},
+                                                 {"bash", "Shell"},
+                                                 {"lua", "Lua"},
+                                                 {"vim", "VimL"},
+                                                 {"clj", "Clojure"},
+                                                 {"scala", "Scala"},
+                                                 {"kt", "Kotlin"},
+                                                 {"swift", "Swift"},
+                                                 {"m", "Objective-C"},
+                                                 {"pl", "Perl"},
+                                                 {"r", "R"},
+                                                 {"sql", "SQL"},
+                                                 {"html", "HTML"},
+                                                 {"htm", "HTML"},
+                                                 {"css", "CSS"},
+                                                 {"scss", "SCSS"},
+                                                 {"json", "JSON"},
+                                                 {"yaml", "YAML"},
+                                                 {"yml", "YAML"},
+                                                 {"md", "Markdown"},
+                                                 {"rst", "ReStructuredText"},
+                                                 {NULL, NULL}};
+
+struct lang_count {
+  const char *lang;
+  int count;
+};
+
+struct lang_detect_context {
+  struct lang_count counts[100];
+  int count_nr;
+  int total_files;
+  int max_count;
+  const char *primary_lang;
+};
+
+static const char *get_lang_from_ext(const char *filename) {
+  const char *ext = strrchr(filename, '.');
+  if (!ext || ext == filename)
+    return NULL;
+
+  ext++; /* skip the dot */
+
+  for (int i = 0; lang_map[i].ext; i++) {
+    if (!strcasecmp(ext, lang_map[i].ext))
+      return lang_map[i].lang;
+  }
+  return NULL;
+}
+
+static void count_language(struct lang_detect_context *ctx, const char *lang) {
+  int i, found = 0;
+
+  if (!lang)
+    return;
+
+  ctx->total_files++;
+
+  /* Find or add language in counts */
+  for (i = 0; i < ctx->count_nr; i++) {
+    if (!strcmp(ctx->counts[i].lang, lang)) {
+      ctx->counts[i].count++;
+      if (ctx->counts[i].count > ctx->max_count) {
+        ctx->max_count = ctx->counts[i].count;
+        ctx->primary_lang = ctx->counts[i].lang;
+      }
+      found = 1;
+      break;
+    }
+  }
+
+  if (!found && ctx->count_nr < 100) {
+    ctx->counts[ctx->count_nr].lang = lang;
+    ctx->counts[ctx->count_nr].count = 1;
+    if (1 > ctx->max_count) {
+      ctx->max_count = 1;
+      ctx->primary_lang = lang;
+    }
+    ctx->count_nr++;
+  }
+}
+
+static int count_files_cb(const struct object_id *oid, struct strbuf *base,
+                          const char *pathname, unsigned mode, void *cbdata) {
+  struct lang_detect_context *ctx = cbdata;
+  const char *lang;
+
+  /* Skip directories */
+  if (S_ISDIR(mode))
+    return READ_TREE_RECURSIVE;
+
+  /* Skip hidden files */
+  if (pathname[0] == '.')
+    return 0;
+
+  lang = get_lang_from_ext(pathname);
+  count_language(ctx, lang);
+
+  return 0;
+}
+
+void detect_repo_languages(struct cgit_repo *repo) {
+  struct object_id oid;
+  struct commit *commit;
+  struct tree *tree;
+  struct pathspec paths = {.nr = 0};
+  struct lang_detect_context ctx;
+
+  if (!repo->defbranch)
+    return;
+
+  memset(&ctx, 0, sizeof(ctx));
+
+  /* Get the commit for the default branch */
+  if (repo_get_oid(the_repository, repo->defbranch, &oid))
+    return;
+
+  commit = lookup_commit_reference(the_repository, &oid);
+  if (!commit)
+    return;
+
+  if (repo_parse_commit(the_repository, commit))
+    return;
+
+  tree = repo_get_commit_tree(the_repository, commit);
+  if (!tree)
+    return;
+
+  /* Walk the tree and count file extensions */
+  read_tree(the_repository, tree, &paths, count_files_cb, &ctx);
+
+  /* Store results in repo */
+  if (ctx.primary_lang) {
+    repo->primary_lang = xstrdup(ctx.primary_lang);
+    repo->lang_confidence =
+        ctx.total_files > 0 ? (100 * ctx.max_count) / ctx.total_files : 0;
+  }
+}
-- 
cgit v1.3-7-ge9ab