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From 9c1f015c21211c5df5822f70d3d5be81bd54fee2 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Wed, 22 Jan 2020 11:50:03 -0800
Subject: [PATCH 4/4] tool: Implement compdb
This tool outputs a JSON compilation database[0], which is used for
integration with certain IDEs (for example, GNOME Builder).
Fixes #33.
[0] https://clang.llvm.org/docs/JSONCompilationDatabase.html
---
samu.1 | 21 +++++++++++--
tool.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 117 insertions(+), 3 deletions(-)
diff --git a/samu.1 b/samu.1
index a4f3f70..0f10e93 100644
--- a/samu.1
+++ b/samu.1
@@ -1,4 +1,4 @@
-.Dd July 3, 2019
+.Dd January 22, 2019
.Dt SAMU 1
.Os
.Sh NAME
@@ -20,6 +20,12 @@
.Fl t Cm clean
.Op Fl gr
.Op Ar target...
+.Nm
+.Op Fl C Ar dir
+.Op Fl f Ar buildfile
+.Fl t Cm compdb
+.Op Fl x
+.Op Ar rule...
.Sh DESCRIPTION
.Nm
loads a build manifest from
@@ -48,6 +54,12 @@ Targets built with
rules are only removed if
.Fl g
is specified.
+.Pp
+If the
+.Cm compdb
+tool is used, a compilation database
+.Lk ( https://clang.llvm.org/docs/JSONCompilationDatabase.html )
+is printed instead.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl C
@@ -106,9 +118,10 @@ only print a diagnostic message.
.It Fl t
Instead of building, invoke a subtool.
All arguments and flags after the subtool are interpreted by the subtool.
-Currently,
+The currently supported subtools are
.Cm clean
-is the only subtool.
+and
+.Cm compdb .
.It Fl g
When cleaning, also clean outputs of
.Sy generator
@@ -117,6 +130,8 @@ actions.
.Ar targets
are interpreted as rules, and all outputs of actions with the specified rule
types will be cleaned instead.
+.It Fl x
+When printing a compilation database, replace @$rspfile with $rspfile_content (with <blank> in place of <newline>).
.El
.Sh ENVIRONMENT
.Bl -tag -width SAMUFLAGS
diff --git a/tool.c b/tool.c
index aae97c0..f77931e 100644
--- a/tool.c
+++ b/tool.c
@@ -1,7 +1,10 @@
+#define _POSIX_C_SOURCE 200809L
#include <errno.h>
+#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
+#include <unistd.h>
#include "arg.h"
#include "env.h"
#include "graph.h"
@@ -123,8 +126,104 @@ clean(int argc, char *argv[])
return ret;
}
+static void
+printjson(const char *s, size_t n, bool join)
+{
+ size_t i;
+ char c;
+
+ for (i = 0; i < n; ++i) {
+ c = s[i];
+ switch (c) {
+ case '"':
+ case '\\':
+ putchar('\\');
+ break;
+ case '\n':
+ if (join)
+ c = ' ';
+ break;
+ case '\0':
+ return;
+ }
+ putchar(c);
+ }
+}
+
+static int
+compdb(int argc, char *argv[])
+{
+ char dir[PATH_MAX], *p;
+ struct edge *e;
+ struct string *cmd, *rspfile, *content;
+ bool expandrsp = false, first = true;
+ int i;
+ size_t off;
+
+ ARGBEGIN {
+ case 'x':
+ expandrsp = true;
+ break;
+ default:
+ fprintf(stderr, "usage: %s ... -t compdb [-x] rules...\n", argv0);
+ return 2;
+ } ARGEND
+
+ if (!getcwd(dir, sizeof(dir)))
+ fatal("getcwd:");
+
+ putchar('[');
+ for (e = alledges; e; e = e->allnext) {
+ if (e->nin == 0)
+ continue;
+ for (i = 0; i < argc; ++i) {
+ if (strcmp(e->rule->name, argv[i]) == 0) {
+ if (first)
+ first = false;
+ else
+ putchar(',');
+
+ printf("\n {\n \"directory\": \"");
+ printjson(dir, -1, false);
+
+ printf("\",\n \"command\": \"");
+ cmd = edgevar(e, "command", true);
+ rspfile = expandrsp ? edgevar(e, "rspfile", true) : NULL;
+ p = rspfile ? strstr(cmd->s, rspfile->s) : NULL;
+ if (!p || p == cmd->s || p[-1] != '@') {
+ printjson(cmd->s, cmd->n, false);
+ } else {
+ off = p - cmd->s;
+ printjson(cmd->s, off - 1, false);
+ content = edgevar(e, "rspfile_content", true);
+ printjson(content->s, content->n, true);
+ off += rspfile->n;
+ printjson(cmd->s + off, cmd->n - off, false);
+ }
+
+ printf("\",\n \"file\": \"");
+ printjson(e->in[0]->path->s, -1, false);
+
+ printf("\",\n \"output\": \"");
+ printjson(e->out[0]->path->s, -1, false);
+
+ printf("\",\n }");
+ break;
+ }
+ }
+ }
+ puts("\n]");
+
+ fflush(stdout);
+ if (ferror(stdout))
+ fatal("write failed");
+
+ return 0;
+}
+
static const struct tool tools[] = {
{"clean", clean},
+ {"compdb", compdb},
};
const struct tool *
--
2.24.0
|
