JUSTOCASOU

minimake/Makefile

@@ -7,7 +7,7 @@ DBG_LDFLAGS= -fsanitize=address
 
 
 SRC_DIR = src
-LIB_SRCS = lines/lines.c hash_maps/hash_maps.c lists/lists.c
+LIB_SRCS = lines/lines.c hash_maps/hash_maps.c lists/lists.c files/files.c
 MAIN_SRCS = main.c minimake.c
 
 # SRCS = $(patsubst %,$(SRC_DIR)/%, $(MAIN_SRCS))

minimake/src/files/files.c

@@ -0,0 +1,99 @@
+#include "files.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+// #include "../lines/lines.h"
+
+char *get_makefile(struct list *files)
+{
+    struct list *file = files;
+    int found = 0;
+
+    // Test file presence
+    while (file != NULL && !found)
+    {
+        FILE *test = fopen(file->data, "r");
+        if (test != NULL)
+        {
+            fclose(test);
+            found = 1;
+        }
+        else
+        {
+            file = file->next;
+        }
+    }
+
+    char *res = NULL;
+    if (found)
+        res = file->data;
+
+    return res;
+}
+
+ssize_t get_file_lastmodiftime(char *filename)
+{
+    struct stat stat;
+    if (lstat(filename, &stat) == -1)
+        return -1;
+    return stat.st_mtime;
+}
+
+// Calls a shell that will run the given command
+// It will first print the command to run unless the it starts with '@'
+// Returns the return code o the command or -1 if a syscall fails
+int run_command(char *command)
+{
+    if (command[0] == '@')
+        command++;
+    else
+    {
+        puts(command);
+    }
+
+    // Just in case
+    fflush(stdout);
+    fflush(stderr);
+
+    // char *executable;
+    // size_t args_offset = readword(command, strlen(command), &executable);
+
+    int id = fork();
+    if (id < 0)
+    {
+        perror("fork");
+        return -1;
+    }
+
+    if (id == 0)
+    {
+        int res = 0;
+        wait(&res);
+        // printf("Got return code: %d\n", res);
+        return res;
+    }
+    else
+    {
+        int res = execl("/bin/sh", "(make)", "-c", command, NULL);
+        return res;
+    }
+}
+
+// Returns 1 if file exists (and is readable), 0 otherwise
+int file_exists(char *filename)
+{
+    if (filename == NULL)
+        return 0;
+
+    FILE *test = fopen(filename, "r");
+    if (test == NULL)
+        return 0;
+
+    fclose(test);
+    return 1;
+}

minimake/src/files/files.h

@@ -0,0 +1,14 @@
+#ifndef FILES_H
+#define FILES_H
+
+#define _XOPEN_SOURCE 500
+
+#include "../lists/lists.h"
+#include <sys/types.h>
+
+char* get_makefile(struct list *files);
+ssize_t get_file_lastmodiftime(char* filename);
+int run_command(char *command);
+int file_exists(char *filename);
+
+#endif // FILES_H

minimake/src/main.c

@@ -5,6 +5,7 @@
 #include <stdio.h>
 #include <string.h>
 
+#include "files/files.h"
 #include "lists/lists.h"
 #include "minimake.h"
 
@@ -58,10 +59,12 @@ static int handle_args(int argc, char **argv, struct list **minimake_files,
             else if (strcmp(argv[i], "-f") == 0)
             {
                 flags |= FLAGS_CUSTOM_FILE;
-                if (i + 1 == argc || argv[i + 1][0] == '-')
+                i++;
+
+                if (i == argc || argv[i][0] == '-')
                     errx(INVALID_ARG, "No file specified after '-f'");
 
-                files = list_prepend(files, argv[i + 1]);
+                files = list_prepend(files, argv[i]);
             }
             // Print
             else if (strcmp(argv[i], "-p") == 0)
@@ -92,33 +95,6 @@ static int handle_args(int argc, char **argv, struct list **minimake_files,
     return flags;
 }
 
-char *get_makefile(struct list *files)
-{
-    struct list *file = files;
-    int found = 0;
-
-    // Test file presence
-    while (file != NULL && !found)
-    {
-        FILE *test = fopen(file->data, "r");
-        if (test != NULL)
-        {
-            fclose(test);
-            found = 1;
-        }
-        else
-        {
-            file = file->next;
-        }
-    }
-
-    char *res = NULL;
-    if (found)
-        res = file->data;
-
-    return res;
-}
-
 int main(int argc, char **argv)
 {
     struct list *files;
@@ -129,8 +105,8 @@ int main(int argc, char **argv)
     if (filename == NULL)
         errx(GENERIC_ERR, "No Makefile found");
 
-    make(filename, flags, argv[0]);
+    int res = make(filename, rules, argv[0], flags);
     list_destroy(files);
     list_destroy(rules);
-    return 0;
+    return res;
 }

minimake/src/minimake.c

@@ -10,6 +10,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include "files/files.h"
 #include "hash_maps/hash_maps.h"
 #include "lines/lines.h"
 #include "lists/lists.h"
@@ -459,21 +460,103 @@ void make_parse(char *path)
 
 // ==== Runtime ====
 
-// static void make_run(void)
-// {}
+// Expands and run a specified rule
+static int run_rule(struct rule *rule)
+{
+    struct list *commands = rule->recipe;
+    struct list *dependencies = rule->dependencies;
+
+    // Expand dependencies variables
+    // TODO
+
+    // Build dependencies
+    while (dependencies != NULL)
+    {
+        // Check file existence
+        if (!file_exists(dependencies->data))
+        {
+            // Check rule existence instead
+            struct rule *dep_rule = hashmap_get(rules, dependencies->data);
+            if (dep_rule != NULL)
+            {
+                int res = run_rule(dep_rule);
+                if (res != 0) // Exit on error
+                    return res;
+            }
+            else
+            {
+                drop(GENERIC_ERR, "No rule to make target '%s'",
+                     dependencies->data);
+            }
+        }
+    }
+
+    while (commands != NULL)
+    {
+        // Expand command variables
+        // TODO
+
+        // Run
+        int res = run_command(commands->data);
+        if (res != 0) // Exit on error
+            return res;
+
+        commands = commands->next;
+    }
+
+    return 0;
+}
+
+// Run the given rules after parsing
+int make_run(struct list *given_rules)
+{
+    if (given_rules == NULL)
+    {
+        // No rule specified => run first rule found in the Makefile
+        if (rules_list == NULL)
+            drop(GENERIC_ERR, "No targets");
+
+        struct rule *full_rule = hashmap_get(rules, rules_list->data);
+        if (full_rule == NULL)
+            drop(GENERIC_ERR,
+                 "Internal error: Could not retrieve target '%s' in database",
+                 rules_list->data);
+
+        return run_rule(full_rule);
+    }
+    else
+    {
+        while (given_rules != NULL)
+        {
+            struct rule *full_rule = hashmap_get(rules, given_rules->data);
+            if (full_rule == NULL)
+                drop(GENERIC_ERR, "No rule to make target '%s'",
+                     given_rules->data);
+
+            int res = run_rule(full_rule);
+            if (res != 0)
+                return res;
+
+            given_rules = given_rules->next;
+        }
+        return 0;
+    }
+}
 
 // ==== MAKE ====
 
-void make(char *path, int flags, char *argv0)
+int make(char *path, struct list *rules, char *exec_name, int flags)
 {
-    program_name = argv0;
+    program_name = exec_name;
 
     make_parse(path);
 
     if (flags & FLAGS_PRINT)
         dump_database();
 
+    int status = make_run(rules);
     free_all();
+    return status;
 }
 
 // Prints an error message before exiting gracefully (by freeing all variables)
@@ -482,9 +565,9 @@ void drop(int status, char *format, ...)
     // Print
     va_list args;
     va_start(args, format);
-    fprintf(stderr, "%s: ", program_name);
+    fprintf(stderr, "%s: *** ", program_name);
     vfprintf(stderr, format, args);
-    fprintf(stderr, "\n");
+    fprintf(stderr, ".  Stop.\n");
     va_end(args);
 
     free_all();

minimake/src/minimake.h

@@ -10,8 +10,8 @@
 #define FLAGS_PRINT 2
 
 // Default values
-#define DEFAULT_MAKEFILE "Makefile"
-#define DEFAULT_MAKEFILE_2 "makefile"
+#define DEFAULT_MAKEFILE "makefile"
+#define DEFAULT_MAKEFILE_2 "Makefile"
 #define BUFFER_SIZE 1024
 #define HASHMAP_SIZE 32
 
@@ -38,8 +38,9 @@ struct rule
     struct list *recipe;
 };
 
-void make(char *path, int flags, char* program_name);
+int make(char *path, struct list* rules, char *argv0, int flags);
 void make_parse(char *path);
+int make_run(struct list *rules);
 void drop(int status, char *format, ...);
 void dump_database(void);
 size_t expand_variable(struct line *line, size_t index, char **value);

minimake/tests/Makefile.test3

@@ -0,0 +1 @@
+VAR = 1

minimake/tests/Makefile.test4

@@ -0,0 +1,5 @@
+rule1:
+	echo Toto
+
+rule2:
+	@echo Toto