Commit 98b24aa47f98d9c70d1e152228ac89dd41e0f637 | zig

author	Andrew Kelley <andrew@ziglang.org> 2021-03-04 17:37:53-07:00
committer	Andrew Kelley <andrew@ziglang.org> 2021-03-04 17:37:53-07:00
log	98b24aa47f98d9c70d1e152228ac89dd41e0f637
tree	ac089158784ff211ad44a726b801519e4fdac126
parent	ffb2568a9f0d038a94a23bfe776602ac9099e2a0

stage2: support environment variables for verbose options

The presence of ZIG_VERBOSE_LINK now enables --verbose-link.
The presence of ZIG_VERBOSE_CC now enables --verbose-cc.

These are useful when debugging usage of `zig cc` which does not have
CLI flags for these options, since they are not valid C compiler flags.

1 files changed, 11 insertions(+), 2 deletions(-)

src
- main.zig

src/main.zig+11-2

 @@ -448,6 +448,15 @@ const Emit = union(enum) {
     }
 };
+fn optionalBoolEnvVar(arena: *Allocator, name: []const u8) !bool {
+    if (std.process.getEnvVarOwned(arena, name)) |value| {
+        return true;
+    } else |err| switch (err) {
+        error.EnvironmentVariableNotFound => return false,
+        else => |e| return e,
+    }
+}
 fn optionalStringEnvVar(arena: *Allocator, name: []const u8) !?[]const u8 {
     if (std.process.getEnvVarOwned(arena, name)) |value| {
         return value;
 @@ -482,8 +491,8 @@ fn buildOutputType(
     var single_threaded = false;
     var function_sections = false;
     var watch = false;
-    var verbose_link = false;
+    var verbose_link = try optionalBoolEnvVar(arena, "ZIG_VERBOSE_LINK");
-    var verbose_cc = false;
+    var verbose_cc = try optionalBoolEnvVar(arena, "ZIG_VERBOSE_CC");
     var verbose_tokenize = false;
     var verbose_ast = false;
     var verbose_ir = false;