platform: read config file line by line

issue #2

src/cdo.c

@@ -5,6 +5,7 @@
 #include "cmd.h"
 #include "tools/log.h"
 #include "platform/operations.h"
+#include "platform/base.h"
 
 static void __attribute__((constructor)) init_cdo(void) {
   atexit(exit_cmd);
@@ -15,6 +16,8 @@ static void __attribute__((constructor)) init_cdo(void) {
 int main (int argc, char *argv[]) {
   struct ArgList* args = parse_args(argc, argv);
   const char* relative_project_path = extract_value_from_arg(args, ARG_PROJECT);
-  LOG_INFO("Project full path: %s", convert_relative_to_full_path(relative_project_path));
+  const char* full_path = convert_relative_to_full_path(relative_project_path);
+  LOG_INFO("Project full path: %s", full_path);
+  identify_platfrom_from_project(full_path);
   return 0;
 }

src/platform/base.c

@@ -0,0 +1,57 @@
+#include "base.h"
+#include "../tools/buffer.h"
+#include "../tools/log.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+const char* SUPPORTED_PLATFORM_NAMES [] = {
+    "github.com",
+    "gitlab.com"
+};
+
+PlaformId identify_platfrom_from_project(const char* project_path) {
+    if (project_path == NULL) {
+       LOG_ERROR_EXIT("No path supplied for project.");
+    }
+    Buffer* git_config_path_buffer = buffer_create(strlen(project_path));
+    buffer_append(git_config_path_buffer, project_path);
+    buffer_append(git_config_path_buffer, PATH_TO_GIT_CONFIG_RELATIVE_TO_PROJ);
+    LOG_DEBUG("Constructed git config file path: %s", git_config_path_buffer->data);
+
+    FILE* git_config_fp = fopen(git_config_path_buffer->data, "r");
+    if (git_config_fp == NULL) {
+        LOG_ERROR_EXIT("Could not open file %s. ERRNO %d; %s",
+                        git_config_path_buffer->data,
+                        errno,
+                        strerror(errno));
+    }
+    struct stat statbuf;
+    if (stat(git_config_path_buffer->data, &statbuf) == -1) {
+        LOG_ERROR_EXIT("Could not stat file %s.ERRNO %d; %s",
+                        git_config_path_buffer->data,
+                        errno,
+                        strerror(errno));
+    }
+    off_t file_size = statbuf.st_size;
+    buffer_free(git_config_path_buffer);
+    // TODO: Remove magic number from creating buffer for git config line
+    Buffer* line_buffer = buffer_create(128);
+    for (off_t i = 0; i < file_size; i++) {
+        unsigned char current_char = fgetc(git_config_fp);
+        if (current_char == '\n') {
+            buffer_append_c(line_buffer, '\0');
+            LOG_INFO("%s", line_buffer->data);
+            line_buffer->size = 0;
+        } else {
+            buffer_append_c(line_buffer, current_char);
+        }
+    }
+    fclose(git_config_fp);
+    buffer_free(line_buffer);
+    return PL_UNRECOGNIZED;
+}

src/platform/base.h

@@ -0,0 +1,16 @@
+#ifndef __PLATFORM_BASE_H__
+#define __PLATFORM_BASE_H__
+
+#define PATH_TO_GIT_CONFIG_RELATIVE_TO_PROJ "/.git/config"
+
+typedef enum PlaformId {
+    PL_GITHUB,
+    PL_GITLAB,
+    PL_UNRECOGNIZED
+} PlaformId;
+
+extern const char* SUPPORTED_PLATFORM_NAMES [];
+
+PlaformId identify_platfrom_from_project(const char* project_path);
+
+#endif /*__PLATFORM_BASE_H__*/

src/platform/operations.c

@@ -44,7 +44,3 @@ const char* convert_relative_to_full_path(const char* relative_path) {
     return full_path;
 }
 
-
-const char* get_platform_name_from_project(const char* project_path) {
-    return NULL;
-}

src/platform/operations.h

@@ -1,10 +1,6 @@
 #ifndef __PLATFORM_OPERATIONS_H__
 #define __PLATFORM_OPERATIONS_H__
 
-#define PATH_TO_GIT_CONFIG_RELATIVE_TO_PROJ ".git/config"
-
 const char* convert_relative_to_full_path(const char* relative_path);
-const char* get_platform_name_from_project(const char* project_path);
-
 
 #endif /*__PLATFORM_OPERATIONS_H__*/

src/tools/buffer.c

@@ -23,6 +23,15 @@ void buffer_append(Buffer* buffer, const char* str) {
     buffer->size += len;
 }
 
+void buffer_append_c(Buffer* buffer, char c) {
+    if (buffer->size + 1 >= buffer->capacity) {
+        buffer->capacity *= 2;
+        buffer->data = (char*)cdo_realloc(buffer->data, buffer->capacity);
+    }
+    *(buffer->data + buffer->size) = c;
+    buffer->size++;
+}
+
 void buffer_flush(Buffer* buffer) {
     printf("%s", buffer->data);
     buffer_free(buffer);

src/tools/buffer.h

@@ -11,6 +11,7 @@ typedef struct {
 
 Buffer* buffer_create(size_t capacity);
 void buffer_append(Buffer* buffer, const char* str);
+void buffer_append_c(Buffer* buffer, char c);
 void buffer_flush(Buffer* buffer);
 void buffer_free(Buffer* buffer);