cli: Create a CLI to generate an executable from pipa code.

This commit introduces a full-featured CLI that allows you to compile a
file, set the gas and linker path, and define the executable output.

Signed-off-by: Carlos Maniero <carlosmaniero@gmail.com>
Reviewed-by: Johnny Richard <johnny@johnnyrichard.com>
Link: https://lists.sr.ht/~johnnyrichard/pipalang-devel/patches/40642

2 files changed, 162 insertions, 5 deletions

diff --git a/pipa b/pipa
new file mode 100755
index 0000000..d197ade
--- /dev/null
+++ b/pipa
@@ -0,0 +1,160 @@
+#!/bin/sh
+# Copyright (C) 2023 Carlos Maniero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+AS="as"
+LD="ld"
+SCRIPT_DIR=$(dirname "$0")
+PIPAC_PATH="$SCRIPT_DIR/pipac"
+SILENT=0
+
+ERROR_PREFIX="[ERROR]"
+WELCOME_MESSAGE="Welcome to Pipa Compiler"
+PIPA_LOGO=""
+COMPILING_MESSAGE="Compiling:"
+BUILT_MESSAGE="Built:"
+COMPILATION_ERROR_MESSAGE="Compilation error:"
+
+if [ -t 1 ] && [ "$(tput colors)" -ge 8 ]; then
+  ERROR_PREFIX="\033[31m$ERROR_PREFIX\033[0m"
+  PIPA_LOGO="🪁"
+  WELCOME_MESSAGE="\033[1m$PIPA_LOGO $WELCOME_MESSAGE\033[0m"
+  COMPILING_MESSAGE="\033[1m$PIPA_LOGO $COMPILING_MESSAGE\033[0m"
+  BUILT_MESSAGE="\033[1m✅ $BUILT_MESSAGE\033[0m"
+fi
+
+check_deps() {
+  if [ ! -e "$PIPAC_PATH" ]; then
+    printf "$ERROR_PREFIX pipac not found at $PIPAC_PATH. Consider running make command.\n"
+    exit 1
+  fi
+  if [ ! -e "$AS" ] && ! which "$AS" >/dev/null; then
+    printf "$ERROR_PREFIX $AS not found.\n\n"
+    printf "Install it or provide the path with --as <as-path>\n"
+    exit 1
+  fi
+  if [ ! -e "$LD" ] && ! which "$LD" >/dev/null; then
+    printf "$ERROR_PREFIX $LD not found.\n\n"
+    printf "Install it or provide the path with --ld <ld-path>\n"
+    exit 1
+  fi
+}
+
+print_help() {
+  printf "$WELCOME_MESSAGE\n"
+  printf "Usage:\n"
+  printf "$0 [options] <filename.pipa>  Compile filename.pipa\n\n"
+  printf "Options:\n"
+  printf -- "--as     The path of gas compiler.    Default: as\n"
+  printf -- "--help   Prints this prompt.\n"
+  printf -- "--ld     The path of linker compiler. Default: ld\n"
+  printf -- "--out    The executable name.         Default: filename without extension.\n"
+  printf -- "--silent Hide logs. Errors are sill displayed.\n"
+  exit 0
+}
+
+# FIXME: Allow the filename to came before the options
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --silent)
+      SILENT=1
+      shift 1
+      ;;
+    --as)
+      if [ ! -n "$2" ]; then
+        printf "$ERROR_PREFIX no argument passed for --as\n" >&2
+        exit 1
+      fi
+      AS="$2"
+      shift 2
+      ;;
+    --ld)
+      if [ ! -n "$2" ]; then
+        printf "$ERROR_PREFIX no argument passed for --ld\n" >&2
+        exit 1
+      fi
+      LD="$2"
+      shift 2
+      ;;
+    --out)
+      if [ ! -n "$2" ]; then
+        printf "$ERROR_PREFIX no argument passed for --out\n" >&2
+        exit 1
+      fi
+      OUT="$2"
+      shift 2
+      ;;
+    --help)
+      print_help
+      ;;
+    *)
+      break
+      ;;
+  esac
+done
+
+check_deps
+
+FILE_NAME="$1"
+
+log() {
+  if [ "$SILENT" -eq 0 ]; then
+    printf "$1\n"
+  fi
+}
+
+cleanup() {
+  rm -f "$OUT.s"
+  rm -f "$OUT.o"
+}
+
+if [ ! -n "$FILE_NAME" ]; then
+  printf "$ERROR_PREFIX no input file.\n" >&2
+  exit 1
+fi
+
+if [ ! -e "$FILE_NAME" ]; then
+  printf "$ERROR_PREFIX filename not found.\n" >&2
+  exit 1
+fi
+
+log "$COMPILING_MESSAGE $FILE_NAME"
+
+if ! [ -n "${OUT+x}" ]; then
+  OUT="${FILE_NAME%.*}"
+fi
+
+
+if ! $PIPAC_PATH "$FILE_NAME" > "$OUT.s"; then
+  printf "$ERROR_PREFIX $COMPILATION_ERROR_MESSAGE unable to generate assembly.\n"
+  cleanup
+  exit 1
+fi
+
+if ! $AS -o "$OUT.o" "$OUT.s" --64; then
+  printf "$ERROR_PREFIX $COMPILATION_ERROR_MESSAGE unable to compile gas.\n"
+  cleanup
+  exit 1
+fi
+
+if ! $LD -o "$OUT" "$OUT.o"; then
+  printf "$ERROR_PREFIX $COMPILATION_ERROR_MESSAGE unable to link the application.\n"
+  cleanup
+  exit 1
+fi
+
+cleanup
+
+log "$BUILT_MESSAGE $OUT"
diff --git a/test/integration_test.c b/test/integration_test.c
index 0ef3f5d..b6c0f36 100644
--- a/test/integration_test.c
+++ b/test/integration_test.c
@@ -22,15 +22,12 @@
 void
 assert_exit_status(char* filename, int expected_exit_status)
 {
-  char command[255] = "../pipac ";
+  char command[255] = "../pipa --silent --out /tmp/pipa_program ";
   strcat(command, filename);
-  strcat(command, " > /tmp/pipa_example.s");
 
   system(command);
 
-  system("as -o /tmp/pipa_example.o /tmp/pipa_example.s --64");
-  system("ld -o /tmp/pipa_example /tmp/pipa_example.o");
-  int status = system("/tmp/pipa_example");
+  int status = system("/tmp/pipa_program");
 
   if (WIFEXITED(status)) {
     int exit_status = WEXITSTATUS(status);