/*
** Copyright (c) 2007 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the Simplified BSD License (also
** known as the "2-Clause License" or "FreeBSD License".)
** 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.
**
** Author contact information:
** drh@hwaci.com
** http://www.hwaci.com/drh/
**
*******************************************************************************
**
** This file contains code used to implement the "diff" command
*/
#include "config.h"
#include "diffcmd.h"
#include <assert.h>
/*
** Use the right null device for the platform.
*/
#if defined(_WIN32)
# define NULL_DEVICE "NUL"
#else
# define NULL_DEVICE "/dev/null"
#endif
/*
** Used when the name for the diff is unknown.
*/
#define DIFF_NO_NAME "(unknown)"
/*
** Use the "exec-rel-paths" setting and the --exec-abs-paths and
** --exec-rel-paths command line options to determine whether
** certain external commands are executed using relative paths.
*/
static int determine_exec_relative_option(int force){
static int relativePaths = -1;
if( force || relativePaths==-1 ){
int relPathOption = find_option("exec-rel-paths", 0, 0)!=0;
int absPathOption = find_option("exec-abs-paths", 0, 0)!=0;
#if defined(FOSSIL_ENABLE_EXEC_REL_PATHS)
relativePaths = db_get_boolean("exec-rel-paths", 1);
#else
relativePaths = db_get_boolean("exec-rel-paths", 0);
#endif
if( relPathOption ){ relativePaths = 1; }
if( absPathOption ){ relativePaths = 0; }
}
return relativePaths;
}
#if INTERFACE
/*
** An array of FileDirList objects describe the files and directories listed
** on the command line of a "diff" command. Only those objects listed are
** actually diffed.
*/
struct FileDirList {
int nUsed; /* Number of times each entry is used */
int nName; /* Length of the entry */
char *zName; /* Text of the entry */
};
#endif
/*
** Return true if zFile is a file named on the azInclude[] list or is
** a file in a directory named on the azInclude[] list.
**
** if azInclude is NULL, then always include zFile.
*/
static int file_dir_match(FileDirList *p, const char *zFile){
if( p==0 || strcmp(p->zName,".")==0 ) return 1;
if( filenames_are_case_sensitive() ){
while( p->zName ){
if( strcmp(zFile, p->zName)==0
|| (strncmp(zFile, p->zName, p->nName)==0
&& zFile[p->nName]=='/')
){
break;
}
p++;
}
}else{
while( p->zName ){
if( fossil_stricmp(zFile, p->zName)==0
|| (fossil_strnicmp(zFile, p->zName, p->nName)==0
&& zFile[p->nName]=='/')
){
break;
}
p++;
}
}
if( p->zName ){
p->nUsed++;
return 1;
}
return 0;
}
/*
** Print the "Index:" message that patches wants to see at the top of a diff.
*/
void diff_print_index(const char *zFile, u64 diffFlags){
if( (diffFlags & (DIFF_SIDEBYSIDE|DIFF_BRIEF|DIFF_NUMSTAT))==0 ){
char *z = mprintf("Index: %s\n%.66c\n", zFile, '=');
fossil_print("%s", z);
fossil_free(z);
}
}
/*
** Print the +++/--- filename lines for a diff operation.
*/
void diff_print_filenames(const char *zLeft, const char *zRight, u64 diffFlags){
char *z = 0;
if( diffFlags & DIFF_BRIEF ){
/* no-op */
}else if( diffFlags & DIFF_SIDEBYSIDE ){
int w = diff_width(diffFlags);
int n1 = strlen(zLeft);
int n2 = strlen(zRight);
int x;
if( n1==n2 && fossil_strcmp(zLeft,zRight)==0 ){
if( n1>w*2 ) n1 = w*2;
x = w*2+17 - (n1+2);
z = mprintf("%.*c %.*s %.*c\n",
x/2, '=', n1, zLeft, (x+1)/2, '=');
}else{
if( w<20 ) w = 20;
if( n1>w-10 ) n1 = w - 10;
if( n2>w-10 ) n2 = w - 10;
z = mprintf("%.*c %.*s %.*c versus %.*c %.*s %.*c\n",
(w-n1+10)/2, '=', n1, zLeft, (w-n1+1)/2, '=',
(w-n2)/2, '=', n2, zRight, (w-n2+1)/2, '=');
}
}else{
z = mprintf("--- %s\n+++ %s\n", zLeft, zRight);
}
fossil_print("%s", z);
fossil_free(z);
}
/*
** Show the difference between two files, one in memory and one on disk.
**
** The difference is the set of edits needed to transform pFile1 into
** zFile2. The content of pFile1 is in memory. zFile2 exists on disk.
**
** If fSwapDiff is 1, show the set of edits to transform zFile2 into pFile1
** instead of the opposite.
**
** Use the internal diff logic if zDiffCmd is NULL. Otherwise call the
** command zDiffCmd to do the diffing.
**
** When using an external diff program, zBinGlob contains the GLOB patterns
** for file names to treat as binary. If fIncludeBinary is zero, these files
** will be skipped in addition to files that may contain binary content.
*/
void diff_file(
Blob *pFile1, /* In memory content to compare from */
int isBin1, /* Does the 'from' content appear to be binary */
const char *zFile2, /* On disk content to compare to */
const char *zName, /* Display name of the file */
const char *zDiffCmd, /* Command for comparison */
const char *zBinGlob, /* Treat file names matching this as binary */
int fIncludeBinary, /* Include binary files for external diff */
u64 diffFlags, /* Flags to control the diff */
int fSwapDiff /* Diff from Zfile2 to Pfile1 */
){
if( zDiffCmd==0 ){
Blob out; /* Diff output text */
Blob file2; /* Content of zFile2 */
const char *zName2; /* Name of zFile2 for display */
/* Read content of zFile2 into memory */
blob_zero(&file2);
if( file_size(zFile2, ExtFILE)<0 ){
zName2 = NULL_DEVICE;
}else{
blob_read_from_file(&file2, zFile2, ExtFILE);
zName2 = zName;
}
/* Compute and output the differences */
if( diffFlags & DIFF_BRIEF ){
if( blob_compare(pFile1, &file2) ){
fossil_print("CHANGED %s\n", zName);
}
}else{
blob_zero(&out);
if( fSwapDiff ){
text_diff(&file2, pFile1, &out, 0, diffFlags);
}else{
text_diff(pFile1, &file2, &out, 0, diffFlags);
}
if( blob_size(&out) ){
if( diffFlags & DIFF_NUMSTAT ){
fossil_print("%s %s\n", blob_str(&out), zName);
}else{
diff_print_filenames(zName, zName2, diffFlags);
fossil_print("%s\n", blob_str(&out));
}
}
blob_reset(&out);
}
/* Release memory resources */
blob_reset(&file2);
}else{
int cnt = 0;
Blob nameFile1; /* Name of temporary file to old pFile1 content */
Blob cmd; /* Text of command to run */
if( !fIncludeBinary ){
Blob file2;
if( isBin1 ){
fossil_print("%s",DIFF_CANNOT_COMPUTE_BINARY);
return;
}
if( zBinGlob ){
Glob *pBinary = glob_create(zBinGlob);
if( glob_match(pBinary, zName) ){
fossil_print("%s",DIFF_CANNOT_COMPUTE_BINARY);
glob_free(pBinary);
return;
}
glob_free(pBinary);
}
blob_zero(&file2);
if( file_size(zFile2, ExtFILE)>=0 ){
blob_read_from_file(&file2, zFile2, ExtFILE);
}
if( looks_like_binary(&file2) ){
fossil_print("%s",DIFF_CANNOT_COMPUTE_BINARY);
blob_reset(&file2);
return;
}
blob_reset(&file2);
}
/* Construct a temporary file to hold pFile1 based on the name of
** zFile2 */
blob_zero(&nameFile1);
do{
blob_reset(&nameFile1);
blob_appendf(&nameFile1, "%s~%d", zFile2, cnt++);
}while( file_access(blob_str(&nameFile1),F_OK)==0 );
blob_write_to_file(pFile1, blob_str(&nameFile1));
/* Construct the external diff command */
blob_zero(&cmd);
blob_append(&cmd, zDiffCmd, -1);
if( fSwapDiff ){
blob_append_escaped_arg(&cmd, zFile2);
blob_append_escaped_arg(&cmd, blob_str(&nameFile1));
}else{
blob_append_escaped_arg(&cmd, blob_str(&nameFile1));
blob_append_escaped_arg(&cmd, zFile2);
}
/* Run the external diff command */
fossil_system(blob_str(&cmd));
/* Delete the temporary file and clean up memory used */
file_delete(blob_str(&nameFile1));
blob_reset(&nameFile1);
blob_reset(&cmd);
}
}
/*
** Show the difference between two files, both in memory.
**
** The difference is the set of edits needed to transform pFile1 into
** pFile2.
**
** Use the internal diff logic if zDiffCmd is NULL. Otherwise call the
** command zDiffCmd to do the diffing.
**
** When using an external diff program, zBinGlob contains the GLOB patterns
** for file names to treat as binary. If fIncludeBinary is zero, these files
** will be skipped in addition to files that may contain binary content.
*/
void diff_file_mem(
Blob *pFile1, /* In memory content to compare from */
Blob *pFile2, /* In memory content to compare to */
int isBin1, /* Does the 'from' content appear to be binary */
int isBin2, /* Does the 'to' content appear to be binary */
const char *zName, /* Display name of the file */
const char *zDiffCmd, /* Command for comparison */
const char *zBinGlob, /* Treat file names matching this as binary */
int fIncludeBinary, /* Include binary files for external diff */
u64 diffFlags /* Diff flags */
){
if( diffFlags & DIFF_BRIEF ) return;
if( zDiffCmd==0 ){
Blob out; /* Diff output text */
blob_zero(&out);
text_diff(pFile1, pFile2, &out, 0, diffFlags);
if( diffFlags & DIFF_NUMSTAT ){
fossil_print("%s %s\n", blob_str(&out), zName);
}else{
diff_print_filenames(zName, zName, diffFlags);
fossil_print("%s\n", blob_str(&out));
}
/* Release memory resources */
blob_reset(&out);
}else{
Blob cmd;
Blob temp1;
Blob temp2;
Blob prefix1;
Blob prefix2;
if( !fIncludeBinary ){
if( isBin1 || isBin2 ){
fossil_print("%s",DIFF_CANNOT_COMPUTE_BINARY);
return;
}
if( zBinGlob ){
Glob *pBinary = glob_create(zBinGlob);
if( glob_match(pBinary, zName) ){
fossil_print("%s",DIFF_CANNOT_COMPUTE_BINARY);
glob_free(pBinary);
return;
}
glob_free(pBinary);
}
}
/* Construct a prefix for the temporary file names */
blob_zero(&prefix1);
blob_zero(&prefix2);
blob_appendf(&prefix1, "%s-v1", zName);
blob_appendf(&prefix2, "%s-v2", zName);
/* Construct a temporary file names */
file_tempname(&temp1, blob_str(&prefix1));
file_tempname(&temp2, blob_str(&prefix2));
blob_write_to_file(pFile1, blob_str(&temp1));
blob_write_to_file(pFile2, blob_str(&temp2));
/* Construct the external diff command */
blob_zero(&cmd);
blob_append(&cmd, zDiffCmd, -1);
blob_append_escaped_arg(&cmd, blob_str(&temp1));
blob_append_escaped_arg(&cmd, blob_str(&temp2));
/* Run the external diff command */
fossil_system(blob_str(&cmd));
/* Delete the temporary file and clean up memory used */
file_delete(blob_str(&temp1));
file_delete(blob_str(&temp2));
blob_reset(&prefix1);
blob_reset(&prefix2);
blob_reset(&temp1);
blob_reset(&temp2);
blob_reset(&cmd);
}
}
/*
** Run a diff between the version zFrom and files on disk. zFrom might
** be NULL which means to simply show the difference between the edited
** files on disk and the check-out on which they are based.
**
** Use the internal diff logic if zDiffCmd is NULL. Otherwise call the
** command zDiffCmd to do the diffing.
**
** When using an external diff program, zBinGlob contains the GLOB patterns
** for file names to treat as binary. If fIncludeBinary is zero, these files
** will be skipped in addition to files that may contain binary content.
*/
static void diff_against_disk(
const char *zFrom, /* Version to difference from */
const char *zDiffCmd, /* Use this diff command. NULL for built-in */
const char *zBinGlob, /* Treat file names matching this as binary */
int fIncludeBinary, /* Treat file names matching this as binary */
u64 diffFlags, /* Flags controlling diff output */
FileDirList *pFileDir /* Which files to diff */
){
int vid;
Blob sql;
Stmt q;
int asNewFile; /* Treat non-existant files as empty files */
int isNumStat; /* True for --numstat */
asNewFile = (diffFlags & (DIFF_VERBOSE|DIFF_NUMSTAT))!=0;
isNumStat = (diffFlags & DIFF_NUMSTAT)!=0;
vid = db_lget_int("checkout", 0);
vfile_check_signature(vid, CKSIG_ENOTFILE);
blob_zero(&sql);
db_begin_transaction();
if( zFrom ){
int rid = name_to_typed_rid(zFrom, "ci");
if( !is_a_version(rid) ){
fossil_fatal("no such check-in: %s", zFrom);
}
load_vfile_from_rid(rid);
blob_append_sql(&sql,
"SELECT v2.pathname, v2.deleted, v2.chnged, v2.rid==0, v1.rid, v1.islink"
" FROM vfile v1, vfile v2 "
" WHERE v1.pathname=v2.pathname AND v1.vid=%d AND v2.vid=%d"
" AND (v2.deleted OR v2.chnged OR v1.mrid!=v2.rid)"
"UNION "
"SELECT pathname, 1, 0, 0, 0, islink"
" FROM vfile v1"
" WHERE v1.vid=%d"
" AND NOT EXISTS(SELECT 1 FROM vfile v2"
" WHERE v2.vid=%d AND v2.pathname=v1.pathname)"
"UNION "
"SELECT pathname, 0, 0, 1, 0, islink"
" FROM vfile v2"
" WHERE v2.vid=%d"
" AND NOT EXISTS(SELECT 1 FROM vfile v1"
" WHERE v1.vid=%d AND v1.pathname=v2.pathname)"
" ORDER BY 1 /*scan*/",
rid, vid, rid, vid, vid, rid
);
}else{
blob_append_sql(&sql,
"SELECT pathname, deleted, chnged , rid==0, rid, islink"
" FROM vfile"
" WHERE vid=%d"
" AND (deleted OR chnged OR rid==0)"
" ORDER BY pathname /*scan*/",
vid
);
}
db_prepare(&q, "%s", blob_sql_text(&sql));
blob_reset(&sql);
while( db_step(&q)==SQLITE_ROW ){
const char *zPathname = db_column_text(&q,0);
int isDeleted = db_column_int(&q, 1);
int isChnged = db_column_int(&q,2);
int isNew = db_column_int(&q,3);
int srcid = db_column_int(&q, 4);
int isLink = db_column_int(&q, 5);
const char *zFullName;
int showDiff = 1;
Blob fname;
if( !file_dir_match(pFileDir, zPathname) ) continue;
if( determine_exec_relative_option(0) ){
blob_zero(&fname);
file_relative_name(zPathname, &fname, 1);
}else{
blob_set(&fname, g.zLocalRoot);
blob_append(&fname, zPathname, -1);
}
zFullName = blob_str(&fname);
if( isDeleted ){
if( !isNumStat ){ fossil_print("DELETED %s\n", zPathname); }
if( !asNewFile ){ showDiff = 0; zFullName = NULL_DEVICE; }
}else if( file_access(zFullName, F_OK) ){
if( !isNumStat ){ fossil_print("MISSING %s\n", zPathname); }
if( !asNewFile ){ showDiff = 0; }
}else if( isNew ){
if( !isNumStat ){ fossil_print("ADDED %s\n", zPathname); }
srcid = 0;
if( !asNewFile ){ showDiff = 0; }
}else if( isChnged==3 ){
if( !isNumStat ){ fossil_print("ADDED_BY_MERGE %s\n", zPathname); }
srcid = 0;
if( !asNewFile ){ showDiff = 0; }
}else if( isChnged==5 ){
if( !isNumStat ){ fossil_print("ADDED_BY_INTEGRATE %s\n", zPathname); }
srcid = 0;
if( !asNewFile ){ showDiff = 0; }
}
if( showDiff ){
Blob content;
int isBin;
if( !isLink != !file_islink(zFullName) ){
diff_print_index(zPathname, diffFlags);
diff_print_filenames(zPathname, zPathname, diffFlags);
fossil_print("%s",DIFF_CANNOT_COMPUTE_SYMLINK);
continue;
}
if( srcid>0 ){
content_get(srcid, &content);
}else{
blob_zero(&content);
}
isBin = fIncludeBinary ? 0 : looks_like_binary(&content);
diff_print_index(zPathname, diffFlags);
diff_file(&content, isBin, zFullName, zPathname, zDiffCmd,
zBinGlob, fIncludeBinary, diffFlags, 0);
blob_reset(&content);
}
blob_reset(&fname);
}
db_finalize(&q);
db_end_transaction(1); /* ROLLBACK */
}
/*
** Run a diff between the undo buffer and files on disk.
**
** Use the internal diff logic if zDiffCmd is NULL. Otherwise call the
** command zDiffCmd to do the diffing.
**
** When using an external diff program, zBinGlob contains the GLOB patterns
** for file names to treat as binary. If fIncludeBinary is zero, these files
** will be skipped in addition to files that may contain binary content.
*/
static void diff_against_undo(
const char *zDiffCmd, /* Use this diff command. NULL for built-in */
const char *zBinGlob, /* Treat file names matching this as binary */
int fIncludeBinary, /* Treat file names matching this as binary */
u64 diffFlags, /* Flags controlling diff output */
FileDirList *pFileDir /* List of files and directories to diff */
){
Stmt q;
Blob content;
db_prepare(&q, "SELECT pathname, content FROM undo");
blob_init(&content, 0, 0);
while( db_step(&q)==SQLITE_ROW ){
char *zFullName;
const char *zFile = (const char*)db_column_text(&q, 0);
if( !file_dir_match(pFileDir, zFile) ) continue;
zFullName = mprintf("%s%s", g.zLocalRoot, zFile);
db_column_blob(&q, 1, &content);
diff_file(&content, 0, zFullName, zFile,
zDiffCmd, zBinGlob, fIncludeBinary, diffFlags, 0);
fossil_free(zFullName);
blob_reset(&content);
}
db_finalize(&q);
}
/*
** Show the difference between two files identified by ManifestFile
** entries.
**
** Use the internal diff logic if zDiffCmd is NULL. Otherwise call the
** command zDiffCmd to do the diffing.
**
** When using an external diff program, zBinGlob contains the GLOB patterns
** for file names to treat as binary. If fIncludeBinary is zero, these files
** will be skipped in addition to files that may contain binary content.
*/
static void diff_manifest_entry(
struct ManifestFile *pFrom,
struct ManifestFile *pTo,
const char *zDiffCmd,
const char *zBinGlob,
int fIncludeBinary,
u64 diffFlags
){
Blob f1, f2;
int isBin1, isBin2;
int rid;
const char *zName;
if( pFrom ){
zName = pFrom->zName;
}else if( pTo ){
zName = pTo->zName;
}else{
zName = DIFF_NO_NAME;
}
if( diffFlags & DIFF_BRIEF ) return;
diff_print_index(zName, diffFlags);
if( pFrom ){
rid = uuid_to_rid(pFrom->zUuid, 0);
content_get(rid, &f1);
}else{
blob_zero(&f1);
}
if( pTo ){
rid = uuid_to_rid(pTo->zUuid, 0);
content_get(rid, &f2);
}else{
blob_zero(&f2);
}
isBin1 = fIncludeBinary ? 0 : looks_like_binary(&f1);
isBin2 = fIncludeBinary ? 0 : looks_like_binary(&f2);
diff_file_mem(&f1, &f2, isBin1, isBin2, zName, zDiffCmd,
zBinGlob, fIncludeBinary, diffFlags);
blob_reset(&f1);
blob_reset(&f2);
}
/*
** Output the differences between two check-ins.
**
** Use the internal diff logic if zDiffCmd is NULL. Otherwise call the
** command zDiffCmd to do the diffing.
**
** When using an external diff program, zBinGlob contains the GLOB patterns
** for file names to treat as binary. If fIncludeBinary is zero, these files
** will be skipped in addition to files that may contain binary content.
*/
static void diff_two_versions(
const char *zFrom,
const char *zTo,
const char *zDiffCmd,
const char *zBinGlob,
int fIncludeBinary,
u64 diffFlags,
FileDirList *pFileDir
){
Manifest *pFrom, *pTo;
ManifestFile *pFromFile, *pToFile;
int asNewFlag = (diffFlags & (DIFF_VERBOSE|DIFF_NUMSTAT))!=0 ? 1 : 0;
pFrom = manifest_get_by_name(zFrom, 0);
manifest_file_rewind(pFrom);
pFromFile = manifest_file_next(pFrom,0);
pTo = manifest_get_by_name(zTo, 0);
manifest_file_rewind(pTo);
pToFile = manifest_file_next(pTo,0);
while( pFromFile || pToFile ){
int cmp;
if( pFromFile==0 ){
cmp = +1;
}else if( pToFile==0 ){
cmp = -1;
}else{
cmp = fossil_strcmp(pFromFile->zName, pToFile->zName);
}
if( cmp<0 ){
if( file_dir_match(pFileDir, pFromFile->zName) ){
if( (diffFlags & DIFF_NUMSTAT)==0 ){
fossil_print("DELETED %s\n", pFromFile->zName);
}
if( asNewFlag ){
diff_manifest_entry(pFromFile, 0, zDiffCmd, zBinGlob,
fIncludeBinary, diffFlags);
}
}
pFromFile = manifest_file_next(pFrom,0);
}else if( cmp>0 ){
if( file_dir_match(pFileDir, pToFile->zName) ){
if( (diffFlags & DIFF_NUMSTAT)==0 ){
fossil_print("ADDED %s\n", pToFile->zName);
}
if( asNewFlag ){
diff_manifest_entry(0, pToFile, zDiffCmd, zBinGlob,
fIncludeBinary, diffFlags);
}
}
pToFile = manifest_file_next(pTo,0);
}else if( fossil_strcmp(pFromFile->zUuid, pToFile->zUuid)==0 ){
/* No changes */
(void)file_dir_match(pFileDir, pFromFile->zName); /* Record name usage */
pFromFile = manifest_file_next(pFrom,0);
pToFile = manifest_file_next(pTo,0);
}else{
if( file_dir_match(pFileDir, pToFile->zName) ){
if( diffFlags & DIFF_BRIEF ){
fossil_print("CHANGED %s\n", pFromFile->zName);
}else{
diff_manifest_entry(pFromFile, pToFile, zDiffCmd, zBinGlob,
fIncludeBinary, diffFlags);
}
}
pFromFile = manifest_file_next(pFrom,0);
pToFile = manifest_file_next(pTo,0);
}
}
manifest_destroy(pFrom);
manifest_destroy(pTo);
}
/*
** Return the name of the external diff command, or return NULL if
** no external diff command is defined.
*/
const char *diff_command_external(int guiDiff){
const char *zDefault;
const char *zName;
if( guiDiff ){
#if defined(_WIN32)
zDefault = "WinDiff.exe";
#else
zDefault = 0;
#endif
zName = "gdiff-command";
}else{
zDefault = 0;
zName = "diff-command";
}
return db_get(zName, zDefault);
}
/*
** Show diff output in a Tcl/Tk window, in response to the --tk option
** to the diff command.
**
** If fossil has direct access to a Tcl interpreter (either loaded
** dynamically through stubs or linked in statically), we can use it
** directly. Otherwise:
** (1) Write the Tcl/Tk script used for rendering into a temp file.
** (2) Invoke "tclsh" on the temp file using fossil_system().
** (3) Delete the temp file.
*/
void diff_tk(const char *zSubCmd, int firstArg){
int i;
Blob script;
const char *zTempFile = 0;
char *zCmd;
blob_zero(&script);
blob_appendf(&script, "set fossilcmd {| \"%/\" %s --html -y -i -v",
g.nameOfExe, zSubCmd);
find_option("html",0,0);
find_option("side-by-side","y",0);
find_option("internal","i",0);
find_option("verbose","v",0);
/* The undocumented --script FILENAME option causes the Tk script to
** be written into the FILENAME instead of being run. This is used
** for testing and debugging. */
zTempFile = find_option("script",0,1);
for(i=firstArg; i<g.argc; i++){
const char *z = g.argv[i];
if( sqlite3_strglob("*}*",z) ){
blob_appendf(&script, " {%/}", z);
}else{
int j;
blob_append(&script, " ", 1);
for(j=0; z[j]; j++) blob_appendf(&script, "\\%03o", (unsigned char)z[j]);
}
}
blob_appendf(&script, "}\n%s", builtin_file("diff.tcl", 0));
if( zTempFile ){
blob_write_to_file(&script, zTempFile);
fossil_print("To see diff, run: tclsh \"%s\"\n", zTempFile);
}else{
#if defined(FOSSIL_ENABLE_TCL)
Th_FossilInit(TH_INIT_DEFAULT);
if( evaluateTclWithEvents(g.interp, &g.tcl, blob_str(&script),
blob_size(&script), 1, 1, 0)==TCL_OK ){
blob_reset(&script);
return;
}
/*
* If evaluation of the Tcl script fails, the reason may be that Tk
* could not be found by the loaded Tcl, or that Tcl cannot be loaded
* dynamically (e.g. x64 Tcl with x86 Fossil). Therefore, fallback
* to using the external "tclsh", if available.
*/
#endif
zTempFile = write_blob_to_temp_file(&script);
zCmd = mprintf("tclsh \"%s\"", zTempFile);
fossil_system(zCmd);
file_delete(zTempFile);
fossil_free(zCmd);
}
blob_reset(&script);
}
/*
** Returns non-zero if files that may be binary should be used with external
** diff programs.
*/
int diff_include_binary_files(void){
const char* zArgIncludeBinary = find_option("diff-binary", 0, 1);
/* Command line argument have priority on settings */
if( zArgIncludeBinary ){
return is_truth(zArgIncludeBinary);
}else{
return db_get_boolean("diff-binary", 1);
}
}
/*
** Returns the GLOB pattern for file names that should be treated as binary
** by the diff subsystem, if any.
*/
const char *diff_get_binary_glob(void){
const char *zBinGlob = find_option("binary", 0, 1);
if( zBinGlob==0 ) zBinGlob = db_get("binary-glob",0);
return zBinGlob;
}
/*
** COMMAND: diff
** COMMAND: gdiff
**
** Usage: %fossil diff|gdiff ?OPTIONS? ?FILE1? ?FILE2 ...?
**
** Show the difference between the current version of each of the FILEs
** specified (as they exist on disk) and that same file as it was checked
** out. Or if the FILE arguments are omitted, show the unsaved changes
** currently in the working check-out.
**
** If the "--from VERSION" or "-r VERSION" option is used it specifies
** the source check-in for the diff operation. If not specified, the
** source check-in is the base check-in for the current check-out.
**
** If the "--to VERSION" option appears, it specifies the check-in from
** which the second version of the file or files is taken. If there is
** no "--to" option then the (possibly edited) files in the current check-out
** are used.
**
** The "--checkin VERSION" option shows the changes made by
** check-in VERSION relative to its primary parent.
**
** The "-i" command-line option forces the use of the internal diff logic
** rather than any external diff program that might be configured using
** the "setting" command. If no external diff program is configured, then
** the "-i" option is a no-op. The "-i" option converts "gdiff" into "diff".
**
** The "-N" or "--new-file" option causes the complete text of added or
** deleted files to be displayed.
**
** The "--diff-binary" option enables or disables the inclusion of binary files
** when using an external diff program.
**
** The "--binary" option causes files matching the glob PATTERN to be treated
** as binary when considering if they should be used with external diff program.
** This option overrides the "binary-glob" setting.
**
** Options:
** --binary PATTERN Treat files that match the glob PATTERN as binary
** --branch BRANCH Show diff of all changes on BRANCH
** --brief Show filenames only
** --checkin VERSION Show diff of all changes in VERSION
** --command PROG External diff program - overrides "diff-command"
** --context|-c N Use N lines of context
** --diff-binary BOOL Include binary files when using external commands
** --exec-abs-paths Force absolute path names with external commands.
** --exec-rel-paths Force relative path names with external commands.
** --from|-r VERSION Select VERSION as source for the diff
** --internal|-i Use internal diff logic
** --numstat Show only the number of lines delete and added
** --side-by-side|-y Side-by-side diff
** --strip-trailing-cr Strip trailing CR
** --tk Launch a Tcl/Tk GUI for display
** --to VERSION Select VERSION as target for the diff
** --undo Diff against the "undo" buffer
** --unified Unified diff
** -v|--verbose Output complete text of added or deleted files
** -w|--ignore-all-space Ignore white space when comparing lines
** -W|--width <num> Width of lines in side-by-side diff
** -Z|--ignore-trailing-space Ignore changes to end-of-line whitespace
*/
void diff_cmd(void){
int isGDiff; /* True for gdiff. False for normal diff */
int isInternDiff; /* True for internal diff */
int verboseFlag; /* True if -v or --verbose flag is used */
const char *zFrom; /* Source version number */
const char *zTo; /* Target version number */
const char *zCheckin; /* Check-in version number */
const char *zBranch; /* Branch to diff */
const char *zDiffCmd = 0; /* External diff command. NULL for internal diff */
const char *zBinGlob = 0; /* Treat file names matching this as binary */
int fIncludeBinary = 0; /* Include binary files for external diff */
int againstUndo = 0; /* Diff against files in the undo buffer */
u64 diffFlags = 0; /* Flags to control the DIFF */
FileDirList *pFileDir = 0; /* Restrict the diff to these files */
if( find_option("tk",0,0)!=0 ){
diff_tk("diff", 2);
return;
}
isGDiff = g.argv[1][0]=='g';
isInternDiff = find_option("internal","i",0)!=0;
zFrom = find_option("from", "r", 1);
zTo = find_option("to", 0, 1);
zCheckin = find_option("checkin", 0, 1);
zBranch = find_option("branch", 0, 1);
againstUndo = find_option("undo",0,0)!=0;
diffFlags = diff_options();
verboseFlag = find_option("verbose","v",0)!=0;
if( !verboseFlag ){
verboseFlag = find_option("new-file","N",0)!=0; /* deprecated */
}
if( verboseFlag ) diffFlags |= DIFF_VERBOSE;
if( againstUndo && ( zFrom!=0 || zTo!=0 || zCheckin!=0 || zBranch!=0) ){
fossil_fatal("cannot use --undo together with --from, --to, --checkin,"
" or --branch");
}
if( zBranch ){
if( zTo || zFrom || zCheckin ){
fossil_fatal("cannot use --from, --to, or --checkin with --branch");
}
zTo = zBranch;
zFrom = mprintf("root:%s", zBranch);
}
if( zCheckin!=0 && ( zFrom!=0 || zTo!=0 ) ){
fossil_fatal("cannot use --checkin together with --from or --to");
}
if( zTo==0 || againstUndo ){
db_must_be_within_tree();
}else if( zFrom==0 ){
fossil_fatal("must use --from if --to is present");
}else{
db_find_and_open_repository(0, 0);
}
if( !isInternDiff ){
zDiffCmd = find_option("command", 0, 1);
if( zDiffCmd==0 ) zDiffCmd = diff_command_external(isGDiff);
}
zBinGlob = diff_get_binary_glob();
fIncludeBinary = diff_include_binary_files();
determine_exec_relative_option(1);
verify_all_options();
if( g.argc>=3 ){
int i;
Blob fname;
pFileDir = fossil_malloc( sizeof(*pFileDir) * (g.argc-1) );
memset(pFileDir, 0, sizeof(*pFileDir) * (g.argc-1));
for(i=2; i<g.argc; i++){
file_tree_name(g.argv[i], &fname, 0, 1);
pFileDir[i-2].zName = fossil_strdup(blob_str(&fname));
if( strcmp(pFileDir[i-2].zName,".")==0 ){
pFileDir[0].zName[0] = '.';
pFileDir[0].zName[1] = 0;
break;
}
pFileDir[i-2].nName = blob_size(&fname);
pFileDir[i-2].nUsed = 0;
blob_reset(&fname);
}
}
if ( zCheckin!=0 ){
int ridTo = name_to_typed_rid(zCheckin, "ci");
zTo = zCheckin;
zFrom = db_text(0,
"SELECT uuid FROM blob, plink"
" WHERE plink.cid=%d AND plink.isprim AND plink.pid=blob.rid",
ridTo);
if( zFrom==0 ){
fossil_fatal("check-in %s has no parent", zTo);
}
}
if( againstUndo ){
if( db_lget_int("undo_available",0)==0 ){
fossil_print("No undo or redo is available\n");
return;
}
diff_against_undo(zDiffCmd, zBinGlob, fIncludeBinary,
diffFlags, pFileDir);
}else if( zTo==0 ){
diff_against_disk(zFrom, zDiffCmd, zBinGlob, fIncludeBinary,
diffFlags, pFileDir);
}else{
diff_two_versions(zFrom, zTo, zDiffCmd, zBinGlob, fIncludeBinary,
diffFlags, pFileDir);
}
if( pFileDir ){
int i;
for(i=0; pFileDir[i].zName; i++){
if( pFileDir[i].nUsed==0
&& strcmp(pFileDir[0].zName,".")!=0
&& !file_isdir(g.argv[i+2], ExtFILE)
){
fossil_fatal("not found: '%s'", g.argv[i+2]);
}
fossil_free(pFileDir[i].zName);
}
fossil_free(pFileDir);
}
}
/*
** WEBPAGE: vpatch
** URL: /vpatch?from=FROM&to=TO
**
** Show a patch that goes from check-in FROM to check-in TO.
*/
void vpatch_page(void){
const char *zFrom = P("from");
const char *zTo = P("to");
login_check_credentials();
if( !g.perm.Read ){ login_needed(g.anon.Read); return; }
if( zFrom==0 || zTo==0 ) fossil_redirect_home();
cgi_set_content_type("text/plain");
diff_two_versions(zFrom, zTo, 0, 0, 0, DIFF_VERBOSE, 0);
}