Added variable support

1 files changed, 35 insertions, 3 deletions

diff --git a/src/hush.c b/src/hush.c
index 557ae1e..0d25244 100644
--- a/src/hush.c
+++ b/src/hush.c
@@ -14,6 +14,7 @@
 #include "config.h"
 #include "lexer.h"
 #include "command.h"
+#include "variables.h"
 
 FILE *open_input(int argc, char **argv) {
   FILE *input_file = (argc > 1) ? fopen(argv[1], "r") : stdin;
@@ -34,10 +35,38 @@ static size_t get_command_len(char *cmdstr) {
   return len;
 }
 
+void variable_substitution(command *cmds) {
+  for (command *cmd = cmds; cmd; cmd = cmd->next) {
+    fprintf(stderr, "Before substitution\n");
+    print_commands(stderr, cmd);
+    for (size_t i=0; i < MAX_ARGUMENT_CNT + 1; i++) {
+      if (is_variable(cmd->args[i])) { 
+        cmd->args[i] = get_variable(cmd->args[i]);
+      }
+    }
+
+    if (is_variable(cmd->outfile)) {
+      cmd->outfile = get_variable(cmd->outfile);
+    }
+
+    if (is_variable(cmd->infile)) {
+      cmd->infile = get_variable(cmd->infile);
+    }
+
+    fprintf(stderr, "After substitution\n");
+    print_commands(stderr, cmd);
+  }
+}
+
 int main(int argc, char **argv) {
   FILE *input_file = open_input(argc, argv);
   char buffer[MAX_LINE_LEN];
 
+  if (!init_variable_store()) {
+    fprintf(stderr, "ERROR: Failed to initialize variable store\n");
+    exit(EXIT_FAILURE);
+  }
+
   fprintf(stdout, "$ ");
   while (fgets(buffer, MAX_LINE_LEN, input_file)) {
     char *cmdstr = trim(buffer);
@@ -68,7 +97,9 @@ int main(int argc, char **argv) {
     // print_parsed_command(stdout, parsed_cmd);
 
     if (parsed_cmd->type == TKN_VARKEY) {
-      /* handle variable creation */
+      if (!add_variable(parsed_cmd->text, parsed_cmd->next->text)) {
+        fprintf(stderr, "ERROR: Failed to create variable\n");
+      }
       goto free_tokens;
     }
 
@@ -79,6 +110,7 @@ int main(int argc, char **argv) {
       goto free_tokens;
     }
 
+    variable_substitution(cmds);
 
     for (command *cmd = cmds; cmd; cmd = cmd->next) {
       pid_t result = execute_command(cmd);
@@ -91,9 +123,7 @@ int main(int argc, char **argv) {
 
     for (command *cmd = cmds; cmd; cmd = cmd->next) {
       if (cmd->pid > 0) {
-        fprintf(stderr, "Waiting for %d\n", cmd->pid);
         waitpid(cmd->pid, NULL, 0);
-        fprintf(stderr, "%d completed\n", cmd->pid);
       }
     }
 
@@ -107,4 +137,6 @@ int main(int argc, char **argv) {
   draw_prompt:
     fprintf(stdout, "$ ");
   }
+
+  destroy_variable_store();
 }