feat: ports - git port

2026-08-09 10:47:07 +02:00
parent cfb8d91442
commit 6f3cf99667
34 changed files with 2255 additions and 2 deletions
@@ -0,0 +1,71 @@
+/*
+ * montauk-paths.h -- teach git what an absolute path looks like on MontaukOS.
+ *
+ * FORCE-INCLUDED into every translation unit (-include, see the port
+ * Makefile), because it has to win the #ifndef guards in git-compat-util.h.
+ *
+ * MontaukOS paths are drive-prefixed: "0:/users/dan/repo". getcwd() returns
+ * one of those, and the kernel's path resolver (kernel/src/Api/Path.hpp)
+ * accepts three forms -- "N:/abs", "/abs" (the current drive's root) and
+ * "rel/ative" against the process cwd.
+ *
+ * Without this header git's is_absolute_path() is just is_dir_sep(path[0]),
+ * so every MontaukOS absolute path reads as RELATIVE and git helpfully
+ * prepends the cwd to it: "0:/users/dan/repo/0:/users/dan/repo". That breaks
+ * setup_git_directory(), real_path() and every worktree path it stores.
+ *
+ * The fix reuses git's existing Windows abstraction rather than inventing
+ * one: has_dos_drive_prefix / skip_dos_drive_prefix / offset_1st_component
+ * are exactly the hooks the DOS "C:/" case goes through, and a MontaukOS
+ * drive differs only in being a digit run rather than a letter. The bodies
+ * below mirror compat/win32/path-utils.c, minus the UNC handling, which has
+ * no MontaukOS equivalent.
+ */
+#ifndef _MONTAUK_GIT_PATHS_H_
+#define _MONTAUK_GIT_PATHS_H_
+
+/*
+ * "12:" as well as "0:" -- ParseDrivePrefix() accepts a multi-digit drive
+ * number, so this must too, or a two-digit drive would silently be treated
+ * as a relative path.
+ */
+static inline int montauk_has_drive_prefix(const char *path)
+{
+	int i = 0;
+
+	if (!path)
+		return 0;
+	while (path[i] >= '0' && path[i] <= '9')
+		i++;
+	return i > 0 && path[i] == ':';
+}
+#define has_dos_drive_prefix montauk_has_drive_prefix
+
+static inline int montauk_skip_drive_prefix(char **path)
+{
+	int i = 0;
+
+	if (!montauk_has_drive_prefix(*path))
+		return 0;
+
+	while ((*path)[i] >= '0' && (*path)[i] <= '9')
+		i++;
+	*path += i + 1;   /* the digits and the ':' */
+	return 1;
+}
+#define skip_dos_drive_prefix montauk_skip_drive_prefix
+
+/*
+ * Length of the leading "root" of the path: the drive prefix plus one
+ * separator if present. Mirrors win32_offset_1st_component().
+ */
+static inline int montauk_offset_1st_component(const char *path)
+{
+	char *pos = (char *)path;
+
+	montauk_skip_drive_prefix(&pos);
+	return (int)(pos - path) + (*pos == '/');
+}
+#define offset_1st_component montauk_offset_1st_component
+
+#endif /* _MONTAUK_GIT_PATHS_H_ */