feat(build): add build instructions in README and convert sources to .c.md format

- Add detailed build and bootstrap instructions to README.md.
 - Convert all source and header files from .c/.h to .c.md/.h.md.
 - Add bootstrap.sh script for automated building across version history.
 - Update Makefile and sources.mk to reflect new markdown-based source organization.

Makefile

@@ -1,32 +1,48 @@
 NAME = c-md
-VERSION = 1.0.0
-TEST_BIN= c-md.test
-
+VERSION = 2.0.0
 .DEFAULT_GOAL := all
+
+TEST_BIN= c-md.test
+CMD = ./$(NAME)
+
 MAKEFLAGS += --no-print-directory
 include sources.mk
 
 CC = clang
-CPPFLAGS = -std=c99 -I includes
+CPPFLAGS = -std=c99
 CFLAGS = -Wall -Wextra -Werror -pipe
 LDFLAGS =
 TEST_LDFLAGS = -lcriterion
 
+BUILD_DIR = .build
+OBJ_DIR = $(BUILD_DIR)/objs
+MAP_DIR = $(BUILD_DIR)/maps
 
-OBJ_DIR = .build
+GEN_SRCS = $(MD_SRCS:$(SRC_DIR)/%.c.md=$(BUILD_DIR)/srcs/%.c)
+GEN_HDRS = $(MD_HDRS:$(INC_DIR)/%.h.md=$(BUILD_DIR)/$(INC_DIR)/%.h)
 
-OBJS = $(SRCS:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
+OBJS = $(GEN_SRCS:$(BUILD_DIR)/srcs/%.c=$(OBJ_DIR)/%.o)
 DEPS = $(OBJS:.o=.d)
 
+.SECONDARY: $(GEN_SRCS) $(GEN_HDRS)
+
 .PHONY: all
 all: $(NAME)
 
-$(NAME): $(OBJS)
-	$(CC) $(LDFLAGS) -o $@ $^
+$(NAME): $(GEN_HDRS) $(OBJS)
+	$(CC) $(LDFLAGS) -o $@ $(OBJS)
 
-$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
+$(BUILD_DIR)/srcs/%.c: $(SRC_DIR)/%.c.md
+	@mkdir -p $(dir $@) $(dir $(MAP_DIR)/$*.map)
+	$(CMD) -i $< -o $@ -m $(MAP_DIR)/$*.map
+
+$(BUILD_DIR)/$(INC_DIR)/%.h: $(INC_DIR)/%.h.md
+	@mkdir -p $(dir $@) $(dir $(MAP_DIR)/$*.h.map)
+	$(CMD) -e c -i $< -o $@ -m $(MAP_DIR)/$*.h.map
+
+$(OBJ_DIR)/%.o: $(BUILD_DIR)/srcs/%.c $(GEN_HDRS)
 	@mkdir -p $(dir $@)
-	$(CC) $(CPPFLAGS) $(CFLAGS) -MMD -MP -c $< -o $@
+	$(CC) $(CPPFLAGS) $(CFLAGS) -I $(BUILD_DIR)/$(INC_DIR) -MMD -MP -c $< -o $@
 
 -include $(DEPS)
 
@@ -37,13 +53,12 @@ test: $(TEST_BIN)
 
 $(TEST_BIN): $(TESTS) $(filter-out $(OBJ_DIR)/main.o,$(OBJS))
 	@mkdir -p $(dir $@)
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(TEST_LDFLAGS) $^ -o $@
-
+	$(CC) $(CPPFLAGS) $(CFLAGS) -I $(BUILD_DIR)/$(INC_DIR) $(TEST_LDFLAGS) $^ -o $@
 
 
 .PHONY: clean
 clean:
-	$(RM) -r $(OBJ_DIR)
+	$(RM) -r $(BUILD_DIR)
 
 .PHONY: fclean
 fclean: clean
@@ -53,4 +68,3 @@ fclean: clean
 .PHONY: re
 re: fclean
 	$(MAKE) all
-

README.md

@@ -106,6 +106,35 @@ For file `main.c.md` with `-e c`:
 
 Multiple matching code blocks are concatenated with a blank line separator.
 
+## Building
+
+c-md is self-hosted
+(dogfooding)[https://en.wikipedia.org/wiki/Self-hosting_(compilers)]. The
+source code is written in `.c.md` format and requires c-md itself to build.
+
+### First Build (Bootstrap)
+
+After cloning or after `make fclean`, run the bootstrap script:
+
+```bash
+./bootstrap.sh
+make
+```
+
+The bootstrap script builds c-md by traversing major version tags,
+starting from v1.0.0 (plain C sources) up to the current version.
+
+### Regular Build
+
+Once c-md is available:
+
+```bash
+make          # build from .c.md sources
+make clean    # remove build artifacts
+make fclean   # remove everything including binary
+make re       # rebuild from scratch
+```
+
 ## Line Mapping
 
 The transpiler generates `.map` files that track the correspondence between
@@ -117,7 +146,7 @@ source lines (`.c.md`) and output lines (`.c`). This enables:
 
 ## Status
 
-**v1.0.0** - Initial stable release
+**v2.0.0** - Initial stable release self-hosted.
 
 ## License
 

bootstrap.sh

@@ -0,0 +1,103 @@
+#!/usr/bin/env sh
+# bootstrap.sh - Build c-md by traversing major version tags
+#
+# This script builds c-md from scratch by going through each major version
+# tag in order. Each version is built using the binary from the previous
+# version, starting from v1.0.0 which uses plain C sources.
+#
+# Use this script after a fresh clone or after 'make fclean'.
+
+set -e
+
+TMP_BIN="/tmp/c-md-bootstrap-$$"
+CURRENT=""
+STASH_NEEDED=0
+
+cleanup() {
+    # Restore original branch if we switched
+    if [ -n "$CURRENT" ]; then
+        CURRENT_BRANCH=$(git branch --show-current)
+        if [ "$CURRENT_BRANCH" != "$CURRENT" ]; then
+            echo "Restoring original branch..."
+            git switch "$CURRENT" --quiet 2>/dev/null || git checkout "$CURRENT" --quiet 2>/dev/null || true
+        fi
+    fi
+
+    # Restore stashed changes
+    if [ "$STASH_NEEDED" -eq 1 ]; then
+        echo "Restoring stashed changes..."
+        git stash pop --quiet 2>/dev/null || echo "Warning: Could not restore stashed changes"
+    fi
+
+    rm -f "$TMP_BIN"
+}
+
+trap cleanup EXIT INT TERM
+
+get_highest_major_tags() {
+  git tag -l 'v*' \
+      | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' \
+      | sort -V \
+      | awk -F. '
+    {
+        m=substr($1, 2)+0;
+        tag = $0
+        tags[m] = tag  # Overwrite; since input is sorted, last wins (highest)
+    } END {
+        for (m in tags) print tags[m]
+    }' \
+    | sort -V
+}
+
+echo "Bootstrapping c-md..."
+
+CURRENT=$(git branch --show-current)
+if [ -n "$(git status --porcelain)" ]; then
+    echo "Stashing local changes..."
+    git stash --include-untracked --quiet
+    STASH_NEEDED=1
+fi
+
+TAGS=$(get_highest_major_tags)
+
+if [ -z "$TAGS" ]; then
+    echo "No version tags found. Building current version from C sources..."
+    make --quiet
+    echo "Bootstrap complete. Binary ready at ./c-md"
+    exit 0
+fi
+
+echo "Found major versions: $(echo $TAGS | tr '\n' ' ')"
+
+for TAG in $TAGS; do
+    echo "Building $TAG..."
+    git switch --detach "$TAG" --quiet
+
+    if [ -f "$TMP_BIN" ]; then
+        cp "$TMP_BIN" ./c-md
+    fi
+
+    make --quiet
+    cp c-md "$TMP_BIN"
+    make fclean --quiet
+done
+
+echo "Restoring current branch..."
+git switch "$CURRENT" --quiet
+
+if [ "$STASH_NEEDED" -eq 1 ]; then
+    echo "Restoring stashed changes..."
+    git stash pop --quiet
+    STASH_NEEDED=0
+fi
+
+echo "Building current version..."
+cp "$TMP_BIN" ./c-md
+make --quiet
+cp c-md "$TMP_BIN"
+make fclean --quiet
+mv "$TMP_BIN" ./c-md
+
+echo ""
+echo "Bootstrap complete. Binary ready at ./c-md"
+echo "Run 'make' to rebuild from sources."

includes/cli.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef CLI_H
 # define CLI_H
 
@@ -19,3 +20,4 @@ void
 cli_print_help(const char *progname);
 
 #endif
+```

includes/internal/map_internal.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef MAP_INTERNAL_H
 # define MAP_INTERNAL_H
 
@@ -17,3 +18,4 @@ int8_t
 write_ranges(FILE *f, t_map *map);
 
 #endif
+```

includes/internal/transpile_internal.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef TRANSPILE_INTERNAL_H
 # define TRANSPILE_INTERNAL_H
 
@@ -35,3 +36,4 @@ int8_t
 handle_code_line(t_state *s, char *line);
 
 #endif
+```

includes/io.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef IO_H
 # define IO_H
 
@@ -17,3 +18,4 @@ void
 io_close(t_io *io);
 
 #endif
+```

includes/map.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef MAP_H
 # define MAP_H
 
@@ -33,3 +34,4 @@ void
 map_free(t_map *map);
 
 #endif
+```

includes/transpile.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef TRANSPILE_H
 # define TRANSPILE_H
 
@@ -9,3 +10,4 @@ int8_t
 transpile(FILE *in, FILE *out, const char *ext, t_map *map);
 
 #endif
+```

includes/utils.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef UTILS_H
 # define UTILS_H
 
@@ -20,3 +21,4 @@ const char *
 infer_ext_from_filename(const char *path);
 
 #endif
+```

includes/validator.h.md

@@ -1,3 +1,4 @@
+```c
 #ifndef VALIDATOR_H
 # define VALIDATOR_H
 
@@ -8,3 +9,4 @@ int8_t
 validator_validate_args(t_args *args);
 
 #endif
+```

sources.mk

@@ -1,21 +1,31 @@
 
 SRC_DIR = srcs
-SRCS = $(SRC_DIR)/main.c \
-	   $(SRC_DIR)/io/streams.c \
-	   $(SRC_DIR)/utils/io/read_line.c \
-	   $(SRC_DIR)/utils/string/starts_with.c \
-	   $(SRC_DIR)/utils/string/extract_fence_ext.c \
-	   $(SRC_DIR)/utils/string/extract_file_ext.c \
-	   $(SRC_DIR)/utils/string/infer_ext_from_filename.c \
-	   $(SRC_DIR)/transpile/state.c \
-	   $(SRC_DIR)/transpile/fence.c \
-	   $(SRC_DIR)/transpile/code.c \
-	   $(SRC_DIR)/transpile/core.c \
-	   $(SRC_DIR)/map/core.c \
-	   $(SRC_DIR)/map/io.c \
-	   $(SRC_DIR)/cli/cli.c \
-	   $(SRC_DIR)/cli/help.c \
-	   $(SRC_DIR)/validator/validator.c
+MD_SRCS = $(SRC_DIR)/main.c.md \
+		  $(SRC_DIR)/io/streams.c.md \
+		  $(SRC_DIR)/utils/io/read_line.c.md \
+		  $(SRC_DIR)/utils/string/starts_with.c.md \
+		  $(SRC_DIR)/utils/string/extract_fence_ext.c.md \
+		  $(SRC_DIR)/utils/string/extract_file_ext.c.md \
+		  $(SRC_DIR)/utils/string/infer_ext_from_filename.c.md \
+		  $(SRC_DIR)/transpile/state.c.md \
+		  $(SRC_DIR)/transpile/fence.c.md \
+		  $(SRC_DIR)/transpile/code.c.md \
+		  $(SRC_DIR)/transpile/core.c.md \
+		  $(SRC_DIR)/map/core.c.md \
+		  $(SRC_DIR)/map/io.c.md \
+		  $(SRC_DIR)/cli/cli.c.md \
+		  $(SRC_DIR)/cli/help.c.md \
+		  $(SRC_DIR)/validator/validator.c.md
+
+INC_DIR = includes
+MD_HDRS = $(INC_DIR)/cli.h.md \
+		  $(INC_DIR)/io.h.md \
+		  $(INC_DIR)/map.h.md \
+		  $(INC_DIR)/transpile.h.md \
+		  $(INC_DIR)/utils.h.md \
+		  $(INC_DIR)/validator.h.md \
+		  $(INC_DIR)/internal/map_internal.h.md \
+		  $(INC_DIR)/internal/transpile_internal.h.md
 
 TESTS_DIR = tests
 TESTS = $(TESTS_DIR)/test_integration.c \

srcs/cli/cli.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stddef.h>
 #include <getopt.h>
 #include <string.h>
@@ -110,3 +111,4 @@ handle_map(t_args *args, const char *value)
 {
 	args->map_path = value;
 }
+```

srcs/cli/help.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdio.h>
 
 #include "cli.h"
@@ -19,3 +20,4 @@ cli_print_help(const char *progname)
 	fprintf(stderr, "  %s -i main.c.md -o main.c\n", progname);
 	fprintf(stderr, "  %s -e h -i file.md -o file.h -m file.map\n", progname);
 }
+```

srcs/io/streams.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdio.h>
 
 #include "io.h"
@@ -30,3 +31,4 @@ io_close(t_io *io)
 	if (NULL != io->out && io->out != stdout)
 		fclose(io->out);
 }
+```

srcs/main.c.md

@@ -1,4 +1,6 @@
+```c
 #include <stdio.h>
+#include <stdint.h>
 
 #include "cli.h"
 #include "validator.h"
@@ -65,3 +67,4 @@ run(t_args *args)
 	io_close(&io);
 	return (ret);
 }
+```

srcs/map/core.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdlib.h>
 
 #include "map.h"
@@ -53,3 +54,4 @@ map_grow(t_map *map)
 	map->capacity = new_cap;
 	return (0);
 }
+```

srcs/map/io.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdio.h>
 
 #include "map.h"
@@ -53,3 +54,4 @@ map_write(t_map *map, const char *path, const char *source, const char *target)
 	fclose(f);
 	return (ret);
 }
+```

srcs/transpile/code.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdio.h>
 
 #include "internal/transpile_internal.h"
@@ -10,3 +11,4 @@ handle_code_line(t_state *s, char *line)
 	s->dst_line++;
 	return (0);
 }
+```

srcs/transpile/core.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdlib.h>
 
 #include "transpile.h"
@@ -36,3 +37,4 @@ transpile(FILE *in, FILE *out, const char *ext, t_map *map)
 	free(line);
 	return (ret);
 }
+```

srcs/transpile/fence.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ -48,3 +49,4 @@ handle_fence_close(t_state *s)
 	}
 	return (0);
 }
+```

srcs/transpile/state.c.md

@@ -1,3 +1,4 @@
+```c
 #include "internal/transpile_internal.h"
 
 void
@@ -14,3 +15,4 @@ state_init(t_state *s, FILE *in, FILE *out, const char *ext, t_map *map)
 	s->in_block = 0;
 	s->first_block = 1;
 }
+```

srcs/utils/io/read_line.c.md

@@ -1,3 +1,4 @@
+```c
 #define _POSIX_C_SOURCE 200809L
 
 #include <stdlib.h>
@@ -22,3 +23,4 @@ read_line(FILE *f)
 	}
 	return (line);
 }
+```

srcs/utils/string/extract_fence_ext.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
@@ -30,3 +31,4 @@ extract_fence_ext(const char *fence)
 	ext[len] = '\0';
 	return (ext);
 }
+```

srcs/utils/string/extract_file_ext.c.md

@@ -1,3 +1,4 @@
+```c
 #include <string.h>
 
 #include "utils.h"
@@ -12,3 +13,4 @@ extract_file_ext(const char *path)
 		return (NULL);
 	return (dot + 1);
 }
+```

srcs/utils/string/infer_ext_from_filename.c.md

@@ -1,3 +1,4 @@
+```c
 #include <string.h>
 
 #include "utils.h"
@@ -35,3 +36,4 @@ infer_ext_from_filename(const char *path)
 	ext_buffer[ext_len] = '\0';
 	return (ext_buffer);
 }
+```

srcs/utils/string/starts_with.c.md

@@ -1,3 +1,4 @@
+```c
 #include <string.h>
 #include <stdint.h>
 
@@ -11,3 +12,4 @@ starts_with(const char *str, const char *prefix)
 	prefix_len = strlen(prefix);
 	return (0 == strncmp(str, prefix, prefix_len));
 }
+```

srcs/validator/validator.c.md

@@ -1,3 +1,4 @@
+```c
 #include <stddef.h>
 
 #include "validator.h"
@@ -20,3 +21,4 @@ validator_validate_args(t_args *args)
 	}
 	return (0);
 }
+```