Allow reading in STRING prompts.

README.md

@@ -1,9 +1,7 @@
 # bootstrap
 
 TODO:
-- [ ] Make free-ing data consistent with null pointers.
 - [ ] Add documentation throughout (ownership, docstrings, etc.).
-- [ ] Organize variables in each function to the top?
 
 CLI utility for initializing projects in reproducible ways.
 

include/evaluator.h

@@ -7,7 +7,7 @@
 
 int evaluate_run_sh(
   const struct Config *const config,
-  const struct DynArray *const prompts,
+  const struct DynArray *const fields,
   struct Error **error
 );
 

include/validator.h

@@ -11,7 +11,9 @@ enum FieldType {
 
 struct Field {
   enum FieldType type;
+  // OWNERSHIP: Does not take ownership.
   const char *key;
+  // OWNERSHIP: Does not take ownership.
   const char *prompt;
 };
 

main.c

@@ -46,14 +46,10 @@ static int run(const char *root_dir, const char *target) {
   }
 
 cleanup_prompts:
-  if (prompts) {
-    dyn_array_free(prompts);
-  }
+  dyn_array_free(prompts);
 
 cleanup_parsed:
-  if (parsed) {
-    cJSON_Delete(parsed);
-  }
+  cJSON_Delete(parsed);
 
 cleanup_config:
   config_free(config);

specs/test/spec.json

@@ -0,0 +1,6 @@
+{
+  "display": {
+    "type": "STRING",
+    "prompt": "This is a prompt"
+  }
+}

src/config.c

@@ -14,6 +14,8 @@ struct Error *config_load(
   const char *target,
   struct Config **config
 ) {
+  assert(target);
+
   if (cwd == 0) {
     return ERROR_NEW(ERROR_CONFIG_ENV_CWD_INVALID, "Could not retrieve $CWD.");
   }
@@ -22,11 +24,9 @@ struct Error *config_load(
       ERROR_CONFIG_ENV_ROOT_DIR_INVALID, "No specified root directory."
     );
   }
-  assert(target);
 
-  // Check if the specified directory exists.
   const char *segments[] = {root_dir, target};
-  char *filepath =
+  const char *filepath =
     join_path_segments(sizeof(segments) / sizeof(char *), segments);
 
   struct stat sb;
@@ -58,7 +58,7 @@ struct Error *config_load(
   (*config)->target = target;
 
 cleanup:
-  free(filepath);
+  free((void *)filepath);
   return error;
 }
 

src/evaluator.c

@@ -1,13 +1,19 @@
 #include "evaluator.h"
 
+#include <assert.h>
+#include <ctype.h>
 #include <errno.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/stat.h>
 
 #include "path.h"
 #include "string_buf.h"
+#include "validator.h"
 
 static struct Error *find_run_sh(const struct Config *const config) {
+  assert(config);
+
   struct stat sb;
   const char *segments[] = {config->root_dir, config->target, "run.sh"};
   char *filepath =
@@ -35,9 +41,41 @@ static struct Error *find_run_sh(const struct Config *const config) {
   return 0;
 }
 
+static const char *prompt_field(struct Field *field) {
+  assert(field);
+
+  switch (field->type) {
+  case FT_STRING:
+    printf("%s> ", field->prompt);
+    char *input = calloc(1, 256);
+    if (fgets(input, 256, stdin)) {
+      size_t len = strlen(input);
+      if (len > 0 && input[len - 1] == '\n') {
+        input[len - 1] = '\0';
+      }
+      return input;
+    } else {
+      free(input);
+      return 0;
+    }
+  }
+}
+
+static void push_env(
+  struct StringBuf *env, const char *key, const char *value
+) {
+  assert(env);
+  for (const char *c = key; *c; ++c) {
+    string_buf_cappend(env, toupper(*c));
+  }
+  string_buf_sappend(env, "='");
+  string_buf_sappend(env, value);
+  string_buf_sappend(env, "' ");
+}
+
 int evaluate_run_sh(
   const struct Config *const config,
-  const struct DynArray *const prompts,
+  const struct DynArray *const fields,
   struct Error **error
 ) {
   *error = find_run_sh(config);
@@ -45,15 +83,28 @@ int evaluate_run_sh(
     return EXIT_FAILURE;
   }
 
-  if (prompts) {
-    for (int i = 0; i < prompts->size; ++i) {
+  struct StringBuf *env_buf = string_buf_new(512);
+  push_env(env_buf, "OUT", config->cwd);
+
+  if (fields) {
+    for (int i = 0; i < fields->size; ++i) {
+      struct Field *field = fields->buf[i];
+      const char *response = prompt_field(field);
+      if (!response) {
+        *error = ERROR_NEW(
+          ERROR_EVALUATOR_RESPONSE_INVALID, "Could not read in response."
+        );
+        string_buf_free(env_buf);
+        return EXIT_FAILURE;
+      }
+      push_env(env_buf, field->key, response);
     }
-    // TODO: Display prompts and collect answers.
   }
 
   const char *segments[] = {config->root_dir, config->target, "run.sh"};
-  char *filepath =
+  const char *filepath =
     join_path_segments(sizeof(segments) / sizeof(char *), segments);
+  const char *env = string_buf_convert(env_buf);
 
   struct StringBuf *command_buf = string_buf_new(1024);
   string_buf_sappend(command_buf, "cd ");
@@ -61,13 +112,12 @@ int evaluate_run_sh(
   string_buf_cappend(command_buf, '/');
   string_buf_sappend(command_buf, config->target);
   string_buf_sappend(command_buf, " && ");
-  string_buf_sappend(command_buf, "OUT=");
-  string_buf_sappend(command_buf, config->cwd);
-  string_buf_cappend(command_buf, ' ');
+  string_buf_sappend(command_buf, env);
   string_buf_sappend(command_buf, filepath);
   const char *command = string_buf_convert(command_buf);
 
-  free(filepath);
+  free((void *)env);
+  free((void *)filepath);
 
   int exit_code = system(command);
   free((void *)command);

src/string_buf.c

@@ -15,7 +15,6 @@ struct StringBuf *string_buf_new(size_t capacity) {
 
 size_t string_buf_size(struct StringBuf *sb) {
   assert(sb);
-
   return sb->size;
 }
 
@@ -55,15 +54,15 @@ void string_buf_sappend(struct StringBuf *sb, const char s[static 1]) {
 
 const char *string_buf_convert(struct StringBuf *sb) {
   assert(sb);
-
   const char *buf = sb->buf;
   free(sb);
   return buf;
 }
 
 void string_buf_free(struct StringBuf *sb) {
-  assert(sb);
-
+  if (!sb) {
+    return;
+  }
   free((void *)sb->buf);
   free(sb);
   sb = 0;

src/validator.c

@@ -14,6 +14,7 @@ static struct Error *read_field(const cJSON *const field, struct Field **out) {
 
   struct Error *error = 0;
   *out = malloc(sizeof(struct Field));
+  (*out)->key = field->string;
 
   const cJSON *type = cJSON_GetObjectItemCaseSensitive(field, "type");
   if (!cJSON_IsString(type)) {
@@ -94,9 +95,7 @@ struct Error *validate_spec_json(
   return 0;
 
 cleanup:
-  if (*fields) {
-    dyn_array_free(*fields);
-    *fields = 0;
-  }
+  dyn_array_free(*fields);
+  *fields = 0;
   return error;
 }