/* * pactree.c - a simple dependency tree viewer * * Copyright (c) 2010-2011 Pacman Development Team <pacman-dev@archlinux.org> * * 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 2 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 <http://www.gnu.org/licenses/>. */ #include "config.h" #include <getopt.h> #include <stdio.h> #include <string.h> #include <alpm.h> #include <alpm_list.h> #define LINE_MAX 512 /* output */ struct graph_style { const char *provides; const char *tip1; const char *tip2; int indent; }; static struct graph_style graph_default = { " provides", "|--", "+--", 3 }; static struct graph_style graph_linear = { "", "", "", 0 }; /* color choices */ struct color_choices { const char *branch1; const char *branch2; const char *leaf1; const char *leaf2; const char *off; }; static struct color_choices use_color = { "\033[0;33m", /* yellow */ "\033[0;37m", /* white */ "\033[1;32m", /* bold green */ "\033[0;32m", /* green */ "\033[0m" }; static struct color_choices no_color = { "", "", "", "", "" }; /* globals */ alpm_handle_t *handle = NULL; alpm_list_t *walked = NULL; alpm_list_t *provisions = NULL; /* options */ struct color_choices *color = &no_color; struct graph_style *style = &graph_default; int graphviz = 0; int max_depth = -1; int reverse = 0; int unique = 0; int searchsyncs = 0; const char *dbpath = DBPATH; static char *strtrim(char *str) { char *pch = str; if(str == NULL || *str == '\0') { /* string is empty, so we're done. */ return str; } while(isspace((unsigned char)*pch)) { pch++; } if(pch != str) { memmove(str, pch, (strlen(pch) + 1)); } /* check if there wasn't anything but whitespace in the string. */ if(*str == '\0') { return str; } pch = (str + (strlen(str) - 1)); while(isspace((unsigned char)*pch)) { pch--; } *++pch = '\0'; return str; } static int register_syncs(void) { FILE *fp; char *ptr, *section = NULL; char line[LINE_MAX]; const alpm_siglevel_t level = ALPM_SIG_DATABASE | ALPM_SIG_DATABASE_OPTIONAL; fp = fopen(CONFFILE, "r"); if(!fp) { return 1; } while(fgets(line, LINE_MAX, fp)) { strtrim(line); if(line[0] == '#' || !strlen(line)) { continue; } if((ptr = strchr(line, '#'))) { *ptr = '\0'; strtrim(line); } if(line[0] == '[' && line[strlen(line) - 1] == ']') { free(section); section = strndup(&line[1], strlen(line) - 2); if(section && strcmp(section, "options") != 0) { alpm_db_register_sync(handle, section, level); } } } free(section); fclose(fp); return 0; } static int parse_options(int argc, char *argv[]) { int opt, option_index = 0; char *endptr = NULL; static struct option opts[] = { {"dbpath", required_argument, 0, 'b'}, {"color", no_argument, 0, 'c'}, {"depth", required_argument, 0, 'd'}, {"graph", no_argument, 0, 'g'}, {"help", no_argument, 0, 'h'}, {"linear", no_argument, 0, 'l'}, {"reverse", no_argument, 0, 'r'}, {"sync", no_argument, 0, 'S'}, {"unique", no_argument, 0, 'u'}, {0, 0, 0, 0} }; while((opt = getopt_long(argc, argv, "b:cd:ghlrsu", opts, &option_index))) { if(opt < 0) { break; } switch(opt) { case 'b': dbpath = optarg; break; case 'c': color = &use_color; break; case 'd': /* validate depth */ max_depth = (int)strtol(optarg, &endptr, 10); if(*endptr != '\0') { fprintf(stderr, "error: invalid depth -- %s\n", optarg); return 1; } break; case 'g': graphviz = 1; break; case 'l': style = &graph_linear; break; case 'r': reverse = 1; break; case 's': searchsyncs = 1; break; case 'u': unique = 1; style = &graph_linear; break; case 'h': case '?': default: return 1; } } if(!argv[optind]) { return 1; } return 0; } static void usage(void) { fprintf(stderr, "pactree v" PACKAGE_VERSION "\n" "Usage: pactree [options] PACKAGE\n\n" " -b, --dbpath <path> set an alternate database location\n" " -c, --color colorize output\n" " -d, --depth <#> limit the depth of recursion\n" " -g, --graph generate output for graphviz's dot\n" " -l, --linear enable linear output\n" " -r, --reverse show reverse dependencies\n" " -s, --sync search sync DBs instead of local\n" " -u, --unique show dependencies with no duplicates (implies -l)\n\n" " -h, --help display this help message\n"); } static void cleanup(void) { alpm_list_free(walked); alpm_list_free(provisions); alpm_release(handle); } /* pkg provides provision */ static void print_text(const char *pkg, const char *provision, int depth) { int indent_sz = (depth + 1) * style->indent; if(!pkg && !provision) { /* not much we can do */ return; } if(!pkg && provision) { /* we failed to resolve provision */ printf("%s%*s%s%s%s [unresolvable]%s\n", color->branch1, indent_sz, style->tip1, color->leaf1, provision, color->branch1, color->off); } else if(provision && strcmp(pkg, provision) != 0) { /* pkg provides provision */ printf("%s%*s%s%s%s%s %s%s%s\n", color->branch2, indent_sz, style->tip2, color->leaf1, pkg, color->leaf2, style->provides, color->leaf1, provision, color->off); } else { /* pkg is a normal package */ printf("%s%*s%s%s%s\n", color->branch1, indent_sz, style->tip1, color->leaf1, pkg, color->off); } } static void print_graph(const char *parentname, const char *pkgname, const char *depname) { if(depname) { printf("\"%s\" -> \"%s\" [color=chocolate4];\n", parentname, depname); if(pkgname && strcmp(depname, pkgname) != 0 && !alpm_list_find_str(provisions, depname)) { printf("\"%s\" -> \"%s\" [arrowhead=none, color=grey];\n", depname, pkgname); provisions = alpm_list_add(provisions, (char *)depname); } } else if(pkgname) { printf("\"%s\" -> \"%s\" [color=chocolate4];\n", parentname, pkgname); } } /* parent depends on dep which is satisfied by pkg */ static void print(const char *parentname, const char *pkgname, const char *depname, int depth) { if(graphviz) { print_graph(parentname, pkgname, depname); } else { print_text(pkgname, depname, depth); } } static void print_start(const char *pkgname, const char *provname) { if(graphviz) { printf("digraph G { START [color=red, style=filled];\n" "node [style=filled, color=green];\n" " \"START\" -> \"%s\";\n", pkgname); } else { print_text(pkgname, provname, 0); } } static void print_end(void) { if(graphviz) { /* close graph output */ printf("}\n"); } } static alpm_pkg_t *get_pkg_from_dbs(alpm_list_t *dbs, const char *needle) { alpm_list_t *i; alpm_pkg_t *ret; for(i = dbs; i; i = alpm_list_next(i)) { ret = alpm_db_get_pkg(alpm_list_getdata(i), needle); if(ret) { return ret; } } return NULL; } /** * walk dependencies in reverse, showing packages which require the target */ static void walk_reverse_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, int depth) { alpm_list_t *required_by, *i; if(!pkg || ((max_depth >= 0) && (depth == max_depth + 1))) { return; } walked = alpm_list_add(walked, (void *)alpm_pkg_get_name(pkg)); required_by = alpm_pkg_compute_requiredby(pkg); for(i = required_by; i; i = alpm_list_next(i)) { const char *pkgname = alpm_list_getdata(i); if(alpm_list_find_str(walked, pkgname)) { /* if we've already seen this package, don't print in "unique" output * and don't recurse */ if(!unique) { print(alpm_pkg_get_name(pkg), pkgname, NULL, depth); } } else { print(alpm_pkg_get_name(pkg), pkgname, NULL, depth); walk_reverse_deps(dblist, get_pkg_from_dbs(dblist, pkgname), depth + 1); } } FREELIST(required_by); } /** * walk dependencies, showing dependencies of the target */ static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, int depth) { alpm_list_t *i; if((max_depth >= 0) && (depth == max_depth + 1)) { return; } walked = alpm_list_add(walked, (void *)alpm_pkg_get_name(pkg)); for(i = alpm_pkg_get_depends(pkg); i; i = alpm_list_next(i)) { alpm_depend_t *depend = alpm_list_getdata(i); alpm_pkg_t *provider = alpm_find_dbs_satisfier(handle, dblist, depend->name); if(provider) { const char *provname = alpm_pkg_get_name(provider); if(alpm_list_find_str(walked, provname)) { /* if we've already seen this package, don't print in "unique" output * and don't recurse */ if(!unique) { print(alpm_pkg_get_name(pkg), provname, depend->name, depth); } } else { print(alpm_pkg_get_name(pkg), provname, depend->name, depth); walk_deps(dblist, provider, depth + 1); } } else { /* unresolvable package */ print(alpm_pkg_get_name(pkg), NULL, depend->name, depth); } } } int main(int argc, char *argv[]) { int freelist = 0, ret = 0; enum _alpm_errno_t err; const char *target_name; alpm_pkg_t *pkg; alpm_list_t *dblist = NULL; if(parse_options(argc, argv) != 0) { usage(); ret = 1; goto finish; } handle = alpm_initialize(ROOTDIR, dbpath, &err); if(!handle) { fprintf(stderr, "error: cannot initialize alpm: %s\n", alpm_strerror(err)); ret = 1; goto finish; } if(searchsyncs) { if(register_syncs() != 0) { fprintf(stderr, "error: failed to register sync DBs\n"); ret = 1; goto finish; } dblist = alpm_option_get_syncdbs(handle); } else { dblist = alpm_list_add(dblist, alpm_option_get_localdb(handle)); freelist = 1; } /* we only care about the first non option arg for walking */ target_name = argv[optind]; pkg = alpm_find_dbs_satisfier(handle, dblist, target_name); if(!pkg) { fprintf(stderr, "error: package '%s' not found\n", target_name); ret = 1; goto finish; } print_start(alpm_pkg_get_name(pkg), target_name); if(reverse) { walk_reverse_deps(dblist, pkg, 1); } else { walk_deps(dblist, pkg, 1); } print_end(); if(freelist) { alpm_list_free(dblist); } finish: cleanup(); return ret; } /* vim: set ts=2 sw=2 noet: */