Add run compiler command

'zig run file.zig' builds a file and stores the artifacts in the global
cache. On successful compilation the binary is executed.

'zig run file.zig -- a b c' does the same, but passes the arguments a,
b and c as runtime arguments to the program. Everything after an '--' are
treated as runtime arguments.

On a posix system, a shebang can be used to run a zig file directly. An
example shebang would be '#!/usr/bin/zig run'. You may not be able pass
extra compile arguments currently as part of the shebang. Linux for example
treats all arguments after the first as a single argument which will result
in an 'invalid command'.

Currently there is no customisability for the cache path as a compile
argument. For a posix system you can use `TMPDIR=. zig run file.zig` to
override, in this case using the current directory for the run cache.

The input file is always recompiled, even if it has changed. This is
intended to be cached but further discussion/thought needs to go into
this.

Closes #466.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/codegen.cpp b/src/codegen.cpp
index 0ebdf7fa3d..bdd28b86fd 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -6286,7 +6286,7 @@ static ImportTableEntry *add_special_code(CodeGen *g, PackageTableEntry *package
         zig_panic("unable to open '%s': %s", buf_ptr(&path_to_code_src), err_str(err));
     }
     Buf *import_code = buf_alloc();
-    if ((err = os_fetch_file_path(abs_full_path, import_code))) {
+    if ((err = os_fetch_file_path(abs_full_path, import_code, false))) {
         zig_panic("unable to open '%s': %s", buf_ptr(&path_to_code_src), err_str(err));
     }
 
@@ -6374,7 +6374,7 @@ static void gen_root_source(CodeGen *g) {
     }
 
     Buf *source_code = buf_alloc();
-    if ((err = os_fetch_file_path(rel_full_path, source_code))) {
+    if ((err = os_fetch_file_path(rel_full_path, source_code, true))) {
         zig_panic("unable to open '%s': %s", buf_ptr(rel_full_path), err_str(err));
     }
 
@@ -6439,7 +6439,7 @@ static void gen_global_asm(CodeGen *g) {
     int err;
     for (size_t i = 0; i < g->assembly_files.length; i += 1) {
         Buf *asm_file = g->assembly_files.at(i);
-        if ((err = os_fetch_file_path(asm_file, &contents))) {
+        if ((err = os_fetch_file_path(asm_file, &contents,  false))) {
             zig_panic("Unable to read %s: %s", buf_ptr(asm_file), err_str(err));
         }
         buf_append_buf(&g->global_asm, &contents);