Make git-mailinfo a builtin

[jc: with a bit of constness tightening]

Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Makefile

@@ -151,7 +151,7 @@ PROGRAMS = \
 	git-checkout-index$X git-clone-pack$X \
 	git-convert-objects$X git-fetch-pack$X git-fsck-objects$X \
 	git-hash-object$X git-index-pack$X git-local-fetch$X \
-	git-mailinfo$X git-merge-base$X \
+	git-merge-base$X \
 	git-merge-index$X git-mktag$X git-mktree$X git-pack-objects$X git-patch-id$X \
 	git-peek-remote$X git-prune-packed$X git-receive-pack$X \
 	git-send-pack$X git-shell$X \
@@ -166,7 +166,7 @@ PROGRAMS = \
 BUILT_INS = git-log$X git-whatchanged$X git-show$X \
 	git-count-objects$X git-diff$X git-push$X git-mailsplit$X \
 	git-grep$X git-add$X git-rm$X git-rev-list$X \
-	git-check-ref-format$X git-rev-parse$X \
+	git-check-ref-format$X git-rev-parse$X git-mailinfo$X \
 	git-init-db$X git-tar-tree$X git-upload-tar$X git-format-patch$X \
 	git-ls-files$X git-ls-tree$X git-get-tar-commit-id$X \
 	git-read-tree$X git-commit-tree$X git-write-tree$X \
@@ -223,7 +223,7 @@ BUILTIN_OBJS = \
 	builtin-rm.o builtin-init-db.o builtin-rev-parse.o \
 	builtin-tar-tree.o builtin-upload-tar.o \
 	builtin-ls-files.o builtin-ls-tree.o builtin-write-tree.o \
-	builtin-read-tree.o builtin-commit-tree.o \
+	builtin-read-tree.o builtin-commit-tree.o builtin-mailinfo.o \
 	builtin-apply.o builtin-show-branch.o builtin-diff-files.o \
 	builtin-diff-index.o builtin-diff-stages.o builtin-diff-tree.o \
 	builtin-cat-file.o builtin-mailsplit.o
@@ -379,9 +379,7 @@ ifdef NEEDS_LIBICONV
 	else
 		ICONV_LINK =
 	endif
-	LIB_4_ICONV = $(ICONV_LINK) -liconv
-else
-	LIB_4_ICONV =
+	LIBS += $(ICONV_LINK) -liconv
 endif
 ifdef NEEDS_SOCKET
 	LIBS += -lsocket
@@ -564,10 +562,6 @@ $(SIMPLE_PROGRAMS) : git-%$X : %.o
 	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
 		$(LIB_FILE) $(SIMPLE_LIB)
 
-git-mailinfo$X: mailinfo.o $(LIB_FILE)
-	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
-		$(LIB_FILE) $(SIMPLE_LIB) $(LIB_4_ICONV)
-
 git-local-fetch$X: fetch.o
 git-ssh-fetch$X: rsh.o fetch.o
 git-ssh-upload$X: rsh.o

builtin-mailinfo.c

@@ -12,11 +12,12 @@
 #endif
 #include "git-compat-util.h"
 #include "cache.h"
+#include "builtin.h"
 
-static FILE *cmitmsg, *patchfile;
+static FILE *cmitmsg, *patchfile, *fin, *fout;
 
 static int keep_subject = 0;
-static char *metainfo_charset = NULL;
+static const char *metainfo_charset = NULL;
 static char line[1000];
 static char date[1000];
 static char name[1000];
@@ -648,7 +649,7 @@ static void handle_info(void)
 	cleanup_space(email);
 	cleanup_space(sub);
 
-	printf("Author: %s\nEmail: %s\nSubject: %s\nDate: %s\n\n",
+	fprintf(fout, "Author: %s\nEmail: %s\nSubject: %s\nDate: %s\n\n",
 	       name, email, sub, date);
 }
 
@@ -685,7 +686,7 @@ static int handle_commit_msg(int *seen)
 			continue;
 
 		fputs(line, cmitmsg);
-	} while (fgets(line, sizeof(line), stdin) != NULL);
+	} while (fgets(line, sizeof(line), fin) != NULL);
 	fclose(cmitmsg);
 	cmitmsg = NULL;
 	return 0;
@@ -706,7 +707,7 @@ static void handle_patch(void)
 		decode_transfer_encoding(line);
 		fputs(line, patchfile);
 		patch_lines++;
-	} while (fgets(line, sizeof(line), stdin) != NULL);
+	} while (fgets(line, sizeof(line), fin) != NULL);
 }
 
 /* multipart boundary and transfer encoding are set up for us, and we
@@ -719,7 +720,7 @@ static int handle_multipart_one_part(int *seen)
 {
 	int n = 0;
 
-	while (fgets(line, sizeof(line), stdin) != NULL) {
+	while (fgets(line, sizeof(line), fin) != NULL) {
 	again:
 		n++;
 		if (is_multipart_boundary(line))
@@ -740,7 +741,7 @@ static void handle_multipart_body(void)
 	int part_num = 0;
 
 	/* Skip up to the first boundary */
-	while (fgets(line, sizeof(line), stdin) != NULL)
+	while (fgets(line, sizeof(line), fin) != NULL)
 		if (is_multipart_boundary(line)) {
 			part_num = 1;
 			break;
@@ -749,7 +750,7 @@ static void handle_multipart_body(void)
 		return;
 	/* We are on boundary line.  Start slurping the subhead. */
 	while (1) {
-		int hdr = read_one_header_line(line, sizeof(line), stdin);
+		int hdr = read_one_header_line(line, sizeof(line), fin);
 		if (!hdr) {
 			if (handle_multipart_one_part(&seen) < 0)
 				return;
@@ -781,10 +782,45 @@ static void handle_body(void)
 	}
 }
 
+int mailinfo(FILE *in, FILE *out, int ks, const char *encoding,
+	     const char *msg, const char *patch)
+{
+	keep_subject = ks;
+	metainfo_charset = encoding;
+	fin = in;
+	fout = out;
+
+	cmitmsg = fopen(msg, "w");
+	if (!cmitmsg) {
+		perror(msg);
+		return -1;
+	}
+	patchfile = fopen(patch, "w");
+	if (!patchfile) {
+		perror(patch);
+		fclose(cmitmsg);
+		return -1;
+	}
+	while (1) {
+		int hdr = read_one_header_line(line, sizeof(line), fin);
+		if (!hdr) {
+			if (multipart_boundary[0])
+				handle_multipart_body();
+			else
+				handle_body();
+			handle_info();
+			break;
+		}
+		check_header_line(line);
+	}
+
+	return 0;
+}
+
 static const char mailinfo_usage[] =
 	"git-mailinfo [-k] [-u | --encoding=<encoding>] msg patch <mail >info";
 
-int main(int argc, char **argv)
+int cmd_mailinfo(int argc, const char **argv, char **envp)
 {
 	/* NEEDSWORK: might want to do the optional .git/ directory
 	 * discovery
@@ -805,27 +841,6 @@ int main(int argc, char **argv)
 
 	if (argc != 3)
 		usage(mailinfo_usage);
-	cmitmsg = fopen(argv[1], "w");
-	if (!cmitmsg) {
-		perror(argv[1]);
-		exit(1);
-	}
-	patchfile = fopen(argv[2], "w");
-	if (!patchfile) {
-		perror(argv[2]);
-		exit(1);
-	}
-	while (1) {
-		int hdr = read_one_header_line(line, sizeof(line), stdin);
-		if (!hdr) {
-			if (multipart_boundary[0])
-				handle_multipart_body();
-			else
-				handle_body();
-			handle_info();
-			break;
-		}
-		check_header_line(line);
-	}
-	return 0;
+
+	return !!mailinfo(stdin, stdout, keep_subject, metainfo_charset, argv[1], argv[2]);
 }

builtin.h

@@ -1,6 +1,8 @@
 #ifndef BUILTIN_H
 #define BUILTIN_H
 
+#include <stdio.h>
+
 #ifndef PATH_MAX
 # define PATH_MAX 4096
 #endif
@@ -51,4 +53,7 @@ extern int write_tree(unsigned char *sha1, int missing_ok, const char *prefix);
 
 extern int cmd_mailsplit(int argc, const char **argv, char **envp);
 extern int split_mbox(const char **mbox, const char *dir, int allow_bare, int nr_prec, int skip);
+
+extern int cmd_mailinfo(int argc, const char **argv, char **envp);
+extern int mailinfo(FILE *in, FILE *out, int ks, const char *encoding, const char *msg, const char *patch);
 #endif

git.c

@@ -180,7 +180,8 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "cat-file", cmd_cat_file },
 		{ "rev-parse", cmd_rev_parse },
 		{ "write-tree", cmd_write_tree },
-		{ "mailsplit", cmd_mailsplit }
+		{ "mailsplit", cmd_mailsplit },
+		{ "mailinfo", cmd_mailinfo }
 	};
 	int i;